Answer: .00829 atm
Explanation:
1 atm is = 101325 Pa
Take 840 Pa and divide by 101325
840 Pa = .00829 atm
Which of the substances have a standard enthalpy of formation (NHf) equal to zero?a. C (diamond).b. F2(g).c. NH3(g)d. Hg (l).
From the given list of compounds, [tex]F_2[/tex](g) and Hg(l) are at their standard state and therefore have a standard enthalpy of formation equal to zero.
The enthalpy change required to produce one mole of a compound from an element in its standard state is known as the standard enthalpy of formation. The standard states represent the shape an element would take at 1 bar of pressure and 25 °C. Since the energy would be different for the ridiculous reaction carried out with the diamond form of carbon, carbon is designated as graphite. Under normal circumstances, hydrogen exists as a molecular gas, thus this form is necessary for the typical reaction.
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What periodic trend does the atomic radius follow?
OA. It stays the same across the table.
OB. It decreases from top to bottom.
C. It increases from left to right.
OD. It decreases from left to right.
Answer:
OD. It decreases from left to right.
Explanation:
Radius decreases from left to right since proton counts increase but your shell stays same (same energy level)
Answer:
OD. It decreases from left to right.
Explanation:
pls tell me if wrong have a good day/night<3
what is the cause of the strange thermal properties of water? group of answer choices the molecule is very polar and so has multiple strong hydrogen bonds that hold the molecules together very strongly the fact that there are is a huge amount of it on earth and that it is gathered into the oceans the covalent bonds making up the water molecule which bind the atoms together very strongly
The thermal characteristics of water, so mystifying and exceptional, are brought about by the awe-inspiring power of hydrogen bonds between the water molecules.
Its distinct positive and negative poles foster the formation of bonds that are incredibly more robust than the average intermolecular interactions.
This hydrogen bonding not only leads to a high boiling and melting point but also results in a significant heat capacity and remarkable surface tension.
The abundance of water on our planet, collected into massive oceans, magnifies these extraordinary qualities, rendering water an indispensable component of life as we know it.
This hydrogen bonding mechanism, which underlies the strange thermal properties of water, continues to captivate scientists and spark wonder in the minds of all who study it.
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what type of reaction combines a carbon-hydrogen compound with oxygen to form carbon dioxide and water?
The process of a hydrocarbon reacting chemically with oxygen to produce carbon dioxide, water, and heat is known as hydrocarbon combustion. Molecules with both hydrogen and carbon make up hydrocarbons.
What kind of process produces the byproducts of water and carbon dioxide?When oxygen gas (O2) combines with specific types of chemicals, a combustion reaction happens. The other compound fuel is commonly known as. Burning is a more common term for combustion processes. Water and carbon dioxide are two of the most frequent byproducts of combustion reactions.
A combustion is a form of reaction, right?A fuel and an oxidant, often atmospheric oxygen, engage in a high-temperature exothermic (heat-releasing) redox (oxygen-adding) chemical reaction during combustion that results in oxidized, frequently gaseous products in a mixture known as smoke.
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conclusions: in winter, you can buy a variety of salts to use on your sidewalk. two of the most popular choices are nacl and cacl2. which of the two salts is more effective? justify your answer.
Total 2 ions in water,
The greater the number of dissolved ions in water, the greater the disorder of the puddle, and the lower the freezing point.
when we spread cacl2 is a better road salt than Nacl because it makes more ions per formula unit of the salt dissolved.
A chemical response is a manner that leads to the chemical transformation of 1 set of chemical substances to any other. Classically, chemical reactions embody modifications that handiest involve the positions of electrons inside the forming and breaking of chemical bonds among atoms, without exchange to the nuclei (no change to the factors gift), and may regularly be described with the aid of a chemical equation. Nuclear chemistry is a sub-area of chemistry that involves the chemical reactions of risky and radioactive elements where both electronic and nuclear modifications can arise.
The substance (or materials) initially worried in a chemical reaction are called reactants or reagents. Chemical reactions are commonly characterized by using a chemical trade, and they yield one or greater merchandise, which usually have residences exclusive from the reactants. Reactions often encompass a sequence of man or woman sub-steps, so-referred to as fundamental reactions, and the statistics on the correct path of movement are part of the response mechanism.
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which of the following statements about subatomic particles are true? i. protons and neutrons have charges of opposite signs but the same magnitude. ii. protons and neutrons have about the same mass. iii. a neutral atom always has the same number of neutrons and electrons.
The following statements about subatomic particles are true:
i. Protons and neutrons have charges of opposite signs but the same magnitude.ii. Protons and neutrons have about the same mass. iii. A neutral atom always has the same number of protons and electrons.The answer to the question is that protons and neutrons have charges of opposite signs but the same magnitude, protons and neutrons have about the same mass, and a neutral atom always has the same number of protons and electrons.
Protons have a positive charge of +1, while neutrons have no charge. Electrons have a negative charge of -1. Neutral atoms contain an equal number of protons and electrons, so that the overall charge of the atom is zero.
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons, and thus have different atomic masses.
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graphite and diamond are polymorphs in that they have the same chemical compositions but different crystalline structures true false
The given statement is true. Graphite and diamond are both pure carbon, but they have different crystalline structures and thus different physical properties such as hardness and electrical conductivity.
The crystalline form of carbon element is graphite. It is consists of stacked layers of graphene. Graphite is the most stable form of carbon under some standard conditions. Graphite is soft and has good electrical conductivity.
Diamond is a solid form of carbon element with its atoms will arranged in a crystal structure called as diamond cubic. Another solid form of carbon called as graphite and it is the chemically stable form of carbon at room temperature as well as pressure, but diamond is metastable and it will converts to it at a negligible rate under those conditions. Diamond is the hardest known substance and an insulator.
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you titrate a 200 ml hbr solution with 0.5 m koh. if it takes 150 ml of koh to reach the equivalence point, what was the concentration of the original acid solution?
HBr's initial concentration was 0.375 M.
What is HBr solution?With the chemical formula HBr, HBr is a potent, colourless, and volatile inorganic acid that is also known as hydrobromic acid. It is an extremely caustic and reactive chemical that rapidly dissolves in water to produce a very acidic solution.
How do you determine it?The volume and molarity of the KOH solution injected during the titration can be used to compute the concentration of the initial HBr solution. The number of moles of KOH added is equal to the number of moles of HBr in the starting solution and is calculated by multiplying the amount of KOH used in the titration (150 ml) by its molarity (0.5 M).
Therefore, 0.5 M * 150 ml = 75.0 moles can be used to compute the moles of HBr. Since the HBr solution's initial volume was 200 ml, the concentration can be determined by dividing the HBr molecular weight by the volume, which equals 75.0 moles / 200 ml = 0.375 M.
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Enzymes lower the activation energy required for a reaction without altering the cellular _______________, which would harm the cell.
a. Oxidants
b. Temperature
c. CO2
d. Triglycerides
Enzymes improve metabolic activity and protect the cell from harm by lowering the activation energy required for a process without altering the cellular temperature. The best choice is B.
What happens when the activation energy of enzymes is reduced?By reducing energy and stabilizing the very energetic unstable transition state, enzymes (blue line) alter the creation of the transition state. This not only speeds up the reaction time but also makes the reverse reaction more likely.
What causes a reaction's activation energy to decrease?Lower activation energies are possible with enzymes. The activation energy required to change a reagent into a product is decreased by enzymes.
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what is the molarity of a 11.0 % by mass glucose (c6h12o6) solution? (the density of the solution is 1.03 g/ml .)
11.0 grams of glucose in 100 grams of solution.
Grams of H2O = 100 – 11.0 = 89 H2O
11.0 grams glucose x 1 mole glucose/ 180 grams = 0.0611 moles glucose
1.03 grams solution/ 1 mL solution x 1000 mL liter = 1030 grams solution/liter
[11.0 grams glucose/100 grams solution] x 1030 grams/liter =113.3 grams glucose/1 liter
113.3 grams glucose/1 liter x 1 mole glucose/180 g = 0.629 M
Molarity = 0.629
molality = moles of glucose/kilogram H2O
0.0611 moles/ 89 g H2O x 1000 g/1kilogram = 0.686 molality
A solution of glucose (C6H12O6) that is 11.0% by mass has a molarity of 11.0 grams of glucose per 100 grams of solution has 0.686 molality.
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Full question:
A) What is the molarity of a 10.5% by mass glucose (C6H12O6) solution (density of solution is 1.03 g/mL).
B) What is the molality of the above glucose solution
which of the following would decrease salinity by decreasing the amount of dissolved material in the ocean? group of answer choices evaporation precipitation sea spray a large volcanic eruption
Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean.
Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean. When it rains, freshwater from the atmosphere mixes with the saltwater in the ocean, diluting the concentration of salt in the water. This can lead to a decrease in the overall salinity of the ocean.
Evaporation would have the opposite effect, as it removes water from the ocean and leaves behind a higher concentration of dissolved salts. Sea spray and a large volcanic eruption could also potentially impact the salinity of the ocean, but the overall effect would depend on the specific details of the event.
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Complete Question :
Which of the following would decrease salinity by decreasing the amount of dissolved material in the ocean?
A. evaporation
B. a large volcanic eruption
C. sea spray
D. precipitation
what is the temperature change if the system is a monatomic gas?
The law VP= constant states that one mole of an ideal monatomic gas at temperature T0 expands slowly.
When an ideal monatomic gas changes from one state to another, its temperature doubles but its pressure increases by about two times. The process's entropy change will be (R=2 cal/mol K). Examples of monatomic gases are helium, radon, and neon, which are considered noble gases. Because monoatomic gases lack any rotational or vibrational energy, their thermodynamic behavior is much simpler than that of polyatomic gases. The only chemical elements that, at standard temperature and pressure (STP), we can claim are stable for single-atom molecules are the noble gases.When an ideal monatomic gas changes from one state to another, its pressure increases by around two times while its temperature doubles. The process's change in entropy will be (R=2 cal/mol K).
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Which of the following would be the best way to model the Milky Way Galaxy?
It would be preferable to design the Milky Way Galaxy as a huge barred spiral galaxy.
The Milky Way is what?The Milky Way makes it possible to examine a medium-sized spiral galaxy's functioning in great detail. Similar to how the sun provides the basis for our complete study of stars, it serves as the basis for our knowledge of what occurs within galaxies.
Can humans emigrate from the Milky Way?The technology needed to move between galaxies is much beyond what humanity is now capable of, and it is currently solely the stuff of science fiction. Theoretically speaking, however, there is nothing that demonstrates definitively that interstellar travel is not feasible.
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if a compound has four degrees of unsaturation and shows signals in its 1h nmr spectrum between 7.0 - 8.0 ppm, what structural feature is likely to be present in the compound?
Both compounds will exhibit five signals if a chemical exhibits signals in its 1h nmr spectrum between 7.0 and 8.0 ppm and has four degrees of unsaturation.
There are four distinct signals in the 1H NMR spectrum in all. In the 2,2-dibromopropane proton NMR spectrum, there will only be one singlet as a result. Therefore, the appropriate response is option d. One way to estimate the overall amount of hydrogens in a sample is to divide the integrated strength of a signal in a 1H NMR spectrum by the number of hydrogens that gave rise to the signal (this does not apply to 13C NMR). Two signals can be seen in the H NMR spectra of butane. The molecule has a plane of symmetry.
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. what quantity of energy in kj does it take to convert 0.250 kg of solid methanol (ch3oh) at 120 k to gaseous methanol at 400 k?
The total energy required to convert 0.250 kg of solid methanol to gaseous methanol is 0.066 kJ + 47.49 kJ + 3.41 kJ = 51.00 kJ.
To convert 0.250 kg of solid methanol to gaseous methanol, we need to perform three separate energy exchanges: 1) melting the solid to liquid, 2) heating the liquid to its boiling point, and 3) converting the liquid to gas.
First, we need to melt the solid methanol at 120.0 K to liquid methanol at 176.0 K. This requires an energy transfer of 0.250 kg * 2.2 kJ/mol / (32.04 g/mol) = 0.066 kJ.
Next, we need to heat the liquid methanol from 176.0 K to 338.0 K. This requires an energy transfer of 0.250 kg * (81.3 J/mol K) * (338.0 K - 176.0 K) / (32.04 g/mol) = 47.49 kJ.
Finally, we need to convert the liquid methanol to gas at 338.0 K to 400.0 K. This requires an energy transfer of 0.250 kg * 35.2 kJ/mol / (32.04 g/mol) = 3.41 kJ.
The total energy required to convert 0.250 kg of solid methanol to gaseous methanol is 0.066 kJ + 47.49 kJ + 3.41 kJ = 51.00 kJ.
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Complete question:
What quantity of energy in kJ does it take to convert 0.250 kg of solid methanol at 120.0 K to gaseous methanol at 400.0 K? Molar mass of methanol = 32.04 g/mol
Melting point - 176.0 K
Boiling point - 338.0 K
Heat of fusion - 2.2 kJ/mol
Heat of vaporization - 35.2 kJ/mol
Specific heat (solid) - 105 J/mol K
Specific heat (liquid) - 81.3 J/mol K
Specific heat (gas) - 48.0 J/mol K
imagine, you are boiling an egg. what would be the best method for raising the boiling point of water in a kettle by a few degrees celsius to have it done sooner?
Adding a solute to water can be an effective way to raise its boiling point and speed up the boiling process.
What is the method of raising boiling point?
To raise the boiling point of water in a kettle by a few degrees Celsius and have the boiling process done sooner, you could add a solute that can increase the boiling point of water. Some common solutes used for this purpose are salt (sodium chloride), sugar, and baking soda (sodium bicarbonate).
When a solute is added to water, it disrupts the hydrogen bonding between water molecules and requires more heat to convert the solution into steam. This increase in the energy required to boil the solution results in a higher boiling point.
For example, adding salt to water can increase its boiling point by about 1°C for each 58 g of salt per liter of water. However, it is important to note that adding too much solute can also reduce the solubility of the solute, and the solute may precipitate out of solution if the concentration becomes too high.
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In 1863 John Newlands presented a paper, classifying the 56 discovered elements into 11 groups based on similar physical properties. He noted that pairs of similar elements existed which differed by some multiple of eight in atomic weight. In 1864 Newlands published his version of the periodic table and proposed the Law of Octaves, stating that any given element exhibits analogous behavior to the eighth element following it in the table. Dimitri Mendeleev noticed patterns in the properties and atomic weights of halogens, alkali metals and alkaline metals. He also observed similarities between the series CI-K-Ca, Br-Rb-Sr and I-Cs-Ba. In an effort to extend this pattern to other elements, Mendeleev created a card for each element, containing the element's symbol, atomic weight, and chemical and physical properties. As Mendeleev arranged the cards in order of ascending atomic weight, grouping elements of similar properties together, the periodic table was formed. Although Mendeleev's table demonstrated the periodic nature of elements, during the next century, scientists accurately explained why the properties of the elements recur periodically.
Rutherford discovered nuclear charge and this charge, later termed the atomic number, was used to number the elements within the periodic table. Finally variations of the same elements, or isotopes having the same number of protons and electrons but differing numbers of neutrons, were discovered. How did later discoveries change the model of Mendeleev's periodic table to what we accept today?
how mayn grams of sodium acetate mustbe added to 1.00 l of a .200 m acetic acid solutioj to form a buffer of 4.20
18.04g of sodium acetate must be added to 1.00L of a .200M acetic acid solution to form a buffer of 4.20.
The formula for sodium acetate (NaC2H3O2) is Na+ + C2H3O2-.
To calculate the amount of sodium acetate needed to form a buffer of 4.2, we need to use the Henderson-Hasselbalch equation:
pH = pKa + log([base]/[acid]) where [base] is the concentration of the base (sodium acetate) and [acid] is the concentration of the acid (acetic acid).
Given that the acetic acid concentration is 0.200 M,
we can solve for the concentration of sodium acetate needed to achieve a pH of 4.2 when pKa of acetic acid = 4.75 then:
4.2 = 4.75 + log([base]/0.200)
log([base]) = -0.55
[base] = 0.22 M
Now, we can calculate the amount of sodium acetate needed to achieve this concentration in 1.00 L of solution:
0.22 mol/L × 1.00 L = 0.22 mol
Then, we can convert this amount of moles to grams using the molar mass of sodium acetate.
Molar mass of sodium acetate = 82g/mole
Mass of sodium acetate required = 0.22 x 82 = 18.04g
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if you have 1.0 mol of each of the following compounds, which will have the greatest mass? A. NO
B. NO2
C. N2O
D. N2O5
N2O5 has the highest mass if you combine 1.0 mol each of the preceding chemicals, according to the supplied statement.
What purpose does N2O5 serve?Dinitrogen pentoxide (N2O) applications
used in high-fuel rockets as a powerful oxidizer. used throughout fluids that are not dependent on water to make it easier to nitrate compounds that are extremely sensitive to water. Nitrating agent used in contemporary synthetic organic chemistry.
Why is N2O5 so acidic?Since the oxides in an item's higher oxidation number are more acidic than those in its lower oxidation state, dinitrogen result in higher levels the most caustic oxide compared to no2 and nitrogen tetraoxide. N 2 O 5 becomes the most acidic dioxide as a result.
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2. a mixture contains 0.4 grams of ammonium chloride, 1.0 grams of salt, and 1.6 grams of sand. what is the percentage by mass of each component of the mixture?
The percentage by mass of ammonium chloride is 13.33%. The percentage by mass of salt is 33.33%. The percentage by mass of sand is 53.33%.
Percentage Composition of a MixtureA mixture is made up of different components and it is important to determine the proportion of each component in the mixture. This can be determined by calculating the percentage by mass of each component. The percentage by mass of a component is found by dividing the mass of the component by the total mass of the mixture and multiplying the result by 100. The total mass of the mixture is calculated by summing up the masses of all the components. In this way, we can determine the proportion of each component in the mixture, expressed as a percentage of the total mass. This information can be useful in various fields such as chemistry, pharmacy, and food science, to name a few.
To find the percentage by mass of each component in the mixture, we need to divide the mass of each component by the total mass of the mixture and multiply by 100.
The total mass of the mixture is 0.4 grams + 1.0 grams + 1.6 grams = 3.0 grams.
The percentage by mass of ammonium chloride is (0.4 grams / 3.0 grams) * 100 = 13.33%.
The percentage by mass of salt is (1.0 grams / 3.0 grams) * 100 = 33.33%.
The percentage by mass of sand is (1.6 grams / 3.0 grams) * 100 = 53.33%.
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you have 76.6 grams of silver and have raised it to its melting point. how much additional heat is required to melt the silver?
No additional heat is required to melt the silver as it has already been raised to its melting point.
What is the melting of silver?The melting point of silver is 961.8 °C. Hence, all that is needed is to keep the silver at that temperature until it has completely melted.
The calculation involves determining the temperature at which the silver needs to be heated to in order to melt it. This can be done by calculating the energy required to raise the silver's temperature from its initial state to its melting point.
The energy required is calculated using the formula:
[tex]Energy = Mass * Specific Heat Capacity * Change in Temperature[/tex]
The equation would be:
[tex]Energy = 76.6 grams * 0.235 J/g°C * (961.8 °C - Initial Temperature)[/tex]
The initial temperature will depend on the temperature of the environment the silver is in before it is heated. It can be used to determine how much energy must be added to the silver in order to raise it to its melting point.
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Whats wrong with the KCl in the water
The presence of KCl in water is not inherently problematic, but it can cause issues depending on the specific circumstances and the intended use of the water.
Theoretically, there shouldn't be anything inherently "wrong" with potassium chloride (KCl) in water. KCl is a common salt that is soluble in water, meaning it dissolves in water to form a clear, homogeneous solution. The solubility of KCl in water depends on various factors such as temperature, pressure, and the presence of other dissolved substances. However, in certain specific circumstances, the presence of KCl in water can lead to issues.
For example, if the concentration of KCl in water is too high, it can cause the water to become saturated and can lead to the precipitation of solid KCl. This can cause scaling and deposit buildup on surfaces and equipment, leading to operational problems in industrial processes. The dissolution of KCl in water is a simple chemical process that results in the formation of a clear, homogeneous solution.
The reaction is not spontaneous and does not produce an explosion and can be safely carried out under normal conditions. It's important to note that while some chemical reactions can be exothermic and release heat, the dissolution of KCl in water is not one of them.
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8. metallic gold reacts in a 1:1 stoichiometric ratio with metallic cesium to form the salt csau. this material is transparent with mechanical properties similar to that of table salt. the other two group 11 elements, silver and copper do not react with cesium in this manner. a. explain why gold is the only group 11 element with an isolable 1- anion. b. based on the reason you cited for part a, would you expect uranium metal to also have a high enough electrophilicity to form anions? why or why not. c. csau has the same lattice type as csi meaning that the x-ray diffraction pattern of csau has reflections in similar patterns to those of csi, but the diffraction patterns are slightly different. what are differences in the diffraction patterns between these two materials? why?
A. Gold is the only group 11 element that forms a stable 1- anion because it has the highest electrophilicity among the group 11 elements. Electrophilicity is the measure of an element's ability to attract electrons, and gold has the highest electrophilicity due to its electron configuration and its high electron affinity, which is the energy released when an electron is added to a neutral atom. Gold's high electrophilicity allows it to react with cesium, which is a highly electropositive metal, and form anionic species, such as CSau^-.
B. Based on the reason cited for part A, we would not expect uranium metal to form anions. Uranium has a lower electrophilicity than gold and its electron affinity is also lower, meaning it would be less likely to attract electrons from other elements and form anions.
C. The differences in the diffraction patterns between CSi and CSau are due to the fact that the two materials have different crystal structures. CSi has a sodium chloride-type crystal structure, while CSau has a cesium chloride-type crystal structure. This difference in crystal structure results in slight differences in the spacing between the atoms in the two materials, which leads to differences in the diffraction patterns. The diffraction pattern of a material provides information about its crystal structure, so the slight differences in the diffraction patterns between CSi and CSau are a result of the difference in their crystal structures.
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Sulfuric acid reacts with most bases to give the corresponding?
Sulfuric acid reacts with most bases to give the corresponding sulfate. For example, reacting sulfuric acid with sodium hydroxide will produce sodium sulfate and water. The reaction can be represented as follows:
H2SO4 + 2NaOH → Na2SO4 + 2H2O.
These reactions show that sulfuric acid reacts with most bases to produce the corresponding sulfate salt and water. As the acidity of sulfuric acid increases, it becomes more reactive and more likely to produce the corresponding sulfate salt when reacting with a base.
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which of the following is a component of pancreatic juice? (read choices carefully) group of answer choices bicarbonate (to increase ph) gastric protease hydrochloric acid (to decrease ph) hydrochloric acid (to increase ph) bicarbonate (to decrease ph)
Answer:
Bicarbonate (to decrease pH).
given that a mineral has one plane of cleavage and splits into sheets, is the mineral mica, pyroxene, amphibole, halite, or calcite?
The mineral that is described here is Mica.
What is a mineral?We would have to note that when we are talking about a mineral in this case, we are going to deal with a kind of substance that is composed of several atoms and is filled with various uses as a precious material.
In this case we are told that a mineral has one plane of cleavage and splits into sheets. We know that mica is a mineral that could have cleavages as has been described in the question that we are supposed to deal with here.
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which particle is not used in calculating the atomic mass?
The smallest and least massive atomic particle is the electron, which is negatively charged.Due to the electron's extremely small mass, it is not counted inside the element's atomic number.
What particle does not add to mass?Although they are very small and possess a mass of 1/1850 of that of a protons or neutron, electrons carry a negative charge.Since they are so tiny, they do not, in reality, add to the weight of the atom.
What three particles make up an atom?These particles are frequently referred to it as subatomic particles since they are the building blocks of atoms.There are protons, neutrons, and electrons, three types of subatomic particles.Protons and electrons, two of a subatomic particles, each have an electrical charge of one or the other.
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if 1.44 moles of hcl is consumed in the chemical reaction above, how many grams of hcl are consumed? molar mass of hcl is 36.46 g/mol.
If 1.44 moles of HCl is consumed in the chemical reaction, 52.4064 grams of HCl are consumed.
The number of grams of HCl consumed can be calculated by multiplying the number of moles of HCl chemical by its molar mass. The molar mass of HCl is 36.46 g/mol.
So, to find the number of grams of HCl consumed, we can use the following formula:
= grams of HCl
= moles of HCl × molar mass of HCl
Putting the values, we get:
= Grams of HCl
= 1.44 moles × 36.46 g/mol
= 52.4064 g
Therefore, 1.44 moles of HCl is equivalent to 52.4064 grams of HCl.
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if you have 10.0 grams of a mixture of salt and water and you find that there are 1.3 grams of salt in the mix, what is the percent composition of salt in the original mixture? what is the percent composition of the water?
If 10.0 grams of mixture of salt and water and you find that there are 1.3 grams of salt in the mix, the percent composition of salt is 13 %. The percent composition of the water is 87 %.
The total mass of the mixture = 10 grams
The mass of the salt = 1.3 grams
The percent composition of salt = ( mass of salt/mas of solution ) × 100%
The percent composition of salt = ( 1.3 / 10 ) × 100 %
The percent composition of salt = 13 %
The mass of the water = 10 - 1.3 = 8.7 grams
The percent composition of water = ( 8.7 / 10 ) × 100 %
The percent composition of water = 87 %
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estimate the age of an artifact that has 73% of the amount of c-14 (relative to c-12) compared to living organisms. The half life of C-14 is 5730 years. Remember that all radioactive processes follow first order kinetics.
A) 1500 years
b) 2000 years
c) 2600 years
d) 3200 years