A reduced atomic radius is the result of the electron cloud being drawn closer to the nucleus due to a larger effective nuclear charge's stronger attraction to the electrons.
By atomic, what do you mean?Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. the meanings of atomic. adjective. containing, involving, or pertaining to atoms.
Is atomic a sort of word?Atomic is an adjective, as was said above. Use of the adjective: Atomic hydrogen is released in a stream. We created a little nuclear bomb in the basement. The hairs of a bedbug are virtually atomic, to use an adjective.
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in a double replacement reaction the reactants are usually a. positively charged ions only b. positively and negatively charged ions c. negatively charged only d. metals and halogens
In a double replacement reaction the reactants are usually positively charged ions only.
What are ions?An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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which substance is lowest in unsaturated fats? which substance is lowest in unsaturated fats? salmon corn oil beef canola oil
Unsaturated fats are least abundant in beef oil. Monounsaturated and polyunsaturated fats are good fats that help reduce the risk of heart disease.
How do saturated and unsaturated fat differ from one another?In contrast to unsaturated fatty acids, which have at least one double bond in the fatty acid chain, saturated fatty acids have no double bonds between the individual carbon atoms. Unsaturated fats are often liquid and come from plants, whereas saturated fats are normally solid at room temperature and come from animal sources.
The benefits of unsaturated fat.Unsaturated fats, which are liquid at room temperature, are regarded as healthy fats because they can lower blood cholesterol levels, reduce inflammation, maintain healthy cardiac rhythms, among other positive effects.
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the ph of the stomach can influence the ionization of drugs such as aspirin (aka acetylsalicylic acid or hasp). given that at equilibrium the ph of a 0.1 m aspirin is 2.24, what is the pka of aspirin?
The ph of the stomach can influence the ionization of drugs such as aspirin (aka acetylsalicylic acid or hasp). given that at equilibrium the ph of a 0.1 m aspirin is 2.24. So the pKa of aspirin is approximately +∞.
The pKa of aspirin can be calculated from the pH of a 0.1 M solution of aspirin at equilibrium using the following equation:
pKa = pH + log([A-]/[HA])
where,
[A-] and [HA] = the concentrations of the aspirin ionized (A-) and non-ionized (HA) forms, respectively.
At a pH of 2.24, the concentration of the ionized form of aspirin is much higher than that of the non-ionized form,
so we can assume that
[A-] ≈ 0.1 M
[HA] ≈ 0.
Substituting these values into the equation, we get:
pKa = 2.24 + log(0.1/0) = 2.24 + log(infinity) = 2.24 + +∞ = +∞
So the pKa of aspirin is approximately +∞.
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suppose you have 100.00 ml of a solution of a dye and transfer 2.00 ml of the solution to a 100.00ml volumetric flask. after adding water to the 100.00 ml mark, you take 5.00 ml of that solution and again dilute to 100.00 ml. if you find the dye concentration in the final diluted sample is 0.000158 m, what was the dye concentration in the original solution.
Consequently, the dye's contact time in the 100.00 ml. was 0.171 M.
What is a solutions in the context of chemistry?A homogenous mix comprising two or more parts with particles less than 1 nm is referred to as a solution. Solutions can take various forms, including soda water, salt and sugar solutions, and others.
Let's name the initial solution's percentage "C1."
The intensity of the reaction solution is when 2.00 ml of initial sample is moved to a 100.00 ml of volumetric flask to 100.00 with water.
(2.00 ml) / (100.00 ml + 2.00 ml) * C1 =
0.0195 * C1.
When 5.00 ml of this solution is then diluted to 100.00 ml, the concentration of the final solution is
(5.00 ml) / (100.00 ml + 5.00 ml) * (0.0195 * C1) =
0.0476 * 0.0195 * C1 =
0.000158 M.
So, we can find the original concentration, C1, by rearranging the above equation:
C1 = (0.000158 M) / (0.0476 * 0.0195)
= 0.000158 M / 0.000913
= 0.171 M.
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to what volume should you dilute 130 ml of an 7.90 m cucl2 solution so that 50.0 ml of the diluted solution contains 4.53 g cucl2 ?
To dilute 130 mL of 7.90 M CuCl2 to 1257 mL to obtain a solution that contains 4.53 g of CuCl2 in 50.0 mL of solution.
What is molarity?
Molarity is a unit of concentration that is widely used in chemistry. It is defined as the number of moles of solute per liter (L) of solution.
Calculation
To dilute 130 mL of a 7.90 M CuCl2 solution so that 50.0 mL of the diluted solution contains 4.53 g CuCl2, you need to determine the moles of CuCl2 in 50.0 mL of the diluted solution and then calculate the final volume of the solution.
First, convert 4.53 g of CuCl2 to moles:
4.53 g / (111.00 g/mol) = 0.0407 moles
Next, calculate the molarity of the diluted solution:
0.0407 moles / 0.05 L = 0.814 M
Finally, multiply the initial volume (130 mL) by the ratio of the initial molarity (7.90 M) to the final molarity (0.814 M) to find the final volume:
130 mL * (7.90 M / 0.814 M) = 130 mL * 9.68 = 1257 mL
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The products of the reaction between zinc and sulfuric acid are zinc sulfate, hydrogen sulfide, and water. Balance the equation using the electron-transfer method.
Answer:
Hello
The balanced equation for the reaction between zinc and sulfuric acid using the electron-transfer method is:
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2S(g) + H2O(l)
In this reaction, zinc metal (Zn) donates electrons to the sulfate ion (SO4^2-) to form zinc sulfate, while hydrogen ions (H^+) from the sulfuric acid reduce sulfuric acid (SO4^2-) to form hydrogen sulfide gas (H2S). The hydrogen ions also combine with hydroxide ions (OH^-) from the water to form water molecules (H2O).
1) 5 small and 4 large cups of coffee cost $22.
2 small and 1 large cups of coffee cost $7.
58 + 4( ) = 22
2(58 + 4L = 22)
5(28 + 1L = 7)
Small
coffee =
Large
coffee =
large = ?
$2
22) → →
O
O
$3
O
O
$4
O
small = ??
Small coffees cost $
Large coffees cost $
$5 $6
O
O
O
O
2 points
$7
O
O
how will you confirm the presence of hco3- in baking soda?
An acid can be added to a solution to indicate the occurrence of sodium bicarbonate.. The acid will convert the bicarbonate ion (HCO−3) ( H C O 3 − ) to carbonic acid (H2CO3) ( H 2 C O 3 ) .
What is sodium bicarbonate used for?An acid used to treat acid indigestion and heartburn is sodium bicarbonate. Your doctor may occasionally recommend that you take bicarbonate of soda to lessen the acidity of either blood or urine.
Is sodium bicarbonate harmful to humans?Although bicarbonate isn't usually considered to be one of the most toxic compounds, excessive exposure can have some adverse health effects, such as sneezing and coughing when a lot of powder has been inhaled.
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PLEASE HELP ON THESE TWO QUESTIONS ILL GIVE 65 POINTS PLESEEE HELPPP
Answer:
spring tide
Explanation:
https://oceanservice.noaa.gov/education/tutorial_tides/media/supp_tide06a.html#:~:text=When%20the%20sun%2C%20moon%2C%20and,both%20commonly%20called%20spring%20tides.
A 300 kg car is moving with an acceleration of 10 m/s/s. What is the force of this car?
Answer:
3000 N
Explanation:
The force of the car can be calculated using Newton's second law of motion, which states that the force acting on an object is equal to its mass multiplied by acceleration.
So, the force of the car can be calculated as follows:
Force = Mass * Acceleration
Force = 300 kg * 10 m/s^2
Force = 3000 N
Therefore, the force of the car is 3000 N.
use the law of conservation of mass to answer the questions. consider a hypothetical reaction in which a and b are reactants and c and d are products. if 25 g of a completely reacts with 26 g of b to produce 17 g of c, how many grams of d will be produced?
we can use this principle law of conservation of mass: 25 g + 26 g = 17 g + x g, where x represents the mass of d produced. Solving for x, we find that x = 34 g, so 34 g of d are produced.
The law of conservation of mass states that mass is conserved in a chemical reaction, meaning that the total mass of reactants must equal the total mass of products.
In a chemical reaction, the law of conservation of mass states that the total mass of reactants must equal the total mass of products. Using this principle, we can solve for the unknown mass of a product in a reaction. In this hypothetical reaction, 25 g of a and 26 g of b react to produce 17 g of c and some amount of d. We can write an equation to represent the relationship between the masses of reactants and products: 25 g + 26 g = 17 g + x g, where x represents the mass of d produced. To find the value of x, we can solve the equation: 25 g + 26 g = 17 g + x g, so x = 25 g + 26 g - 17 g = 34 g. Therefore, 34 g of d are produced in this reaction.
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a solution is made by mixing of acetone and of methanol . calculate the mole fraction of acetone in this solution. round your answer to significant digits.
The mole fraction of acetone in this solution is 0.31 to 2 significant digits. The mole fraction of a solute in a solution can be calculated as the number of moles of the solute divided by the total number of moles of both solute and solvent in the solution.
First, we need to calculate the number of moles of acetone and methanol:
moles of acetone = 90 g / (58.08 g/mol) = 1.54 mol
moles of methanol = 108 g / (32.04 g/mol) = 3.36 mol
Next, we add up the moles of both solute and solvent:
total moles = 1.54 mol + 3.36 mol = 4.90 mol
Finally, we can calculate the mole fraction of acetone as follows:
mole fraction of acetone = (1.54 mol of acetone) / (4.90 mol) = 0.31
So the mole fraction of acetone in this solution is 0.31 to 2 significant digits.
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Complete question:
A solution is made by mixing 90. g of acetone ((CH₃)₂CO) and 108. g of methanol (CH₃OH). Calculate the mole fraction of acetone in this solution. Round your answer to 2 significant digits. X?
one cheeseburger has 340 kcal and 25 grams of fat. what percentage of total kcal comes from fat? (round to the nearest whole number)
Percentage of total kcal ( total calories ) comes from fat is 66%
To determine the percentage of total calories that come from fat in a cheeseburger, we first need to calculate the number of calories from fat. Fat has 9 calories per gram, so 25 grams of fat would provide 25 x 9 = 225 calories.
Next, we divide the number of calories from fat by the total number of calories in the cheeseburger and multiply by 100 to find the percentage:
(225 / 340) * 100% = 66.18%
Rounding to the nearest whole number, we can say that 66% of the total calories in a cheeseburger come from fat.
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4. On the night of Diwali, sometimes we have difficulty in breathing. Why?
Answer:
because of the unwanted air it realises
Explanation:
on the night of diwali,sometimes we have difficulty in breathing because of the harmful airs it realises.
Which statement best describes John Dalton’s use of creativity in his work?
He reinterpreted and retested Joseph Proust’s results.
He used a philosophy to conduct his experiment.
He recorded his results as four parts of the atomic theory.
He rejected Democritus’s idea that matter was composed of atoms.
The best statement that describes John Dalton’s use of creativity is that He recorded his results as four parts of the atomic theory, option C.
Who is John Dalton?John Dalton was an English chemist and physicist who lived in the late 18th and early 19th centuries. He is best known for his pioneering work in atomic theory, which he formulated in the early 19th century. According to Dalton's theory, matter is composed of tiny indivisible particles called atoms, which can combine to form molecules.
John Dalton recorded his results as four parts of the atomic theory to describe the fundamental nature of matter. He proposed that all elements are made of tiny indivisible particles called atoms, which are unique to each element.
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How many moles 3 M NaOH were used? Recall that 30.0 mL 3 M NaOH were
used? Show work!
Moles NaOH =???
Please I need help
The moles of NaOH can be calculated using the formula:
moles = concentration (M) x volume (L)
First, convert the volume from milliliters to liters:
30.0 mL = 30.0 mL / 1000 mL/L = 0.03 L
Then, use the formula to calculate the moles:
moles = 3 M x 0.03 L = 0.09 moles
So, 0.09 moles of 3 M NaOH were used.
qual masses of he and ne are placed in a sealed container. what is the partial pressure of he if the total pressure in the container is 6 atm?
If equal masses of He and Ne are placed in a sealed container, the partial pressure of He in the container would be 3 atm, as the total pressure is 6 atm and the partial pressure of Ne would be 3 atm as well.
The partial pressure of a gas in a container is determined by the amount of the gas present in the container and its temperature. In a sealed container, the amount of gas present is fixed, so the pressure of each gas is determined solely by its temperature. In the case of equal amounts of He and Ne, the partial pressure of He would be equal to the partial pressure of Ne, resulting in a total pressure of 6 atm.
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which sample contains a total of 6.0 × 1023 atoms?
In this case, sodium is the right answer since has molecular concentration of 23g per tone. Therefore, if there were 23g of it, one would have mole of it, which is 6.0 grams or 2 times 10 towards 23rd atoms.
What occurs when you consume too much sodium?And when your person attempts to dilute more sodium with water, it increases the volume of your blood and makes you retain fluid. Consequently, the excessive thirst, bloating, and increased blood pressure. If you regularly ingest too much salt, this process also stresses your heart, arteries, and kidneys.
Is salt healthy or unhealthy?A crucial ingredient for wellness is sodium. It is essential for the health of your nerves, muscles, and body's fluid equilibrium.
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If 15.0 liters of neon at 25.0oc is allowed to expand to 45.0 liters, what must the new temperature be in celsius to maintain constant pressure? (3 sig figs for answer)
Answer:
621.3°C
Explanation:
To find the new temperature of the neon gas after it expands from 15.0 liters to 45.0 liters, you can use the Ideal Gas Law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. If the pressure is constant, then P remains constant, so the relationship between volume and temperature can be expressed as:
V1/T1 = V2/T2
where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature.
Substituting the initial values:
V1 = 15.0 liters
T1 = 25.0°C + 273.15 = 298.15 K
And the final values:
V2 = 45.0 liters
We can solve for T2:
T2 = T1 * (V2/V1) = 298.15 K * (45.0 liters / 15.0 liters) = 894.5 K
Finally, we can convert T2 back to Celsius:
T2 = 894.5 K - 273.15 = 621.3°C
In conclusion, if 15.0 liters of neon at 25.0°C is allowed to expand to 45.0 liters, the new temperature must be 621.3°C in order to maintain constant pressure.
What is the legacy of J. J. Thomson's experiment that led to the identification of the electron?
Please help
The legacy of J. J. Thomson's experiment that led to the identification of the electron was that he was involved in the experiment using cathode material which provided the particles and its emission means that particle was a fundamental part of all atom.
What is an Atom?This is referred to as a particle of matter that uniquely defines a chemical element and it consists of a central nucleus that is surrounded by one or more negatively charged electrons.
Thomson concluded that the particle was a fundamental part of all atom because of the electron which was emitted in the experiment.
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sealed heparinized arterial blood was left at room temperature for one hour. which of the following alterations are most likely to occur? group of answer choices po2 decrease, pco2 decrease, ph decrease po2 decrease, pco2 increase, ph decrease po2 increase, pco2 increase, ph increase po2 increase, pco2 increase, ph decrease
Heparinized arterial blood that was sealed was kept at room temperature for an hour. decreases in pO2, increases in pCO2, and decreases in pH are the most expected alterations.
When a full blood sample is kept at room temperature, red blood cells will continue to engage in glycolysis and other oxidative metabolic processes in vitro. While a low PaCO2 indicates alveolar hyperventilation, an increased PaCO2 indicates alveolar hypoventilation. The pH will be changed by abrupt changes in PaCO2. In general, a respiratory acidosis is indicated by a low pH and a high PaCO2, whereas a metabolic acidosis is indicated by a low pH and a low PaCO2. Under typical physiological circumstances, the partial pressure of arterial carbon dioxide primarily regulates minute ventilation, or the number of liters of air exchanged in the lungs per minute (PaCO2).
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what are unshared pairs of electrons according to lewis theory
A pair of electron that isn't shared by the other atoms in a covalently connection is referred to as a lone pair in chemistry and is also known as an unshared pair. Atoms' outermost electron shell contains lone pairs.
What are three electron-related facts?The negatively charged particles known as electrons revolve about the outside of the nucleus. For scientists, it might be challenging to monitor them because of how quickly they spin. They are the tiniest elements in an atom and are drawn to the protons' positive charge.
What is an electron example?The electron, the smallest constituent part of an atom, has a repulsive force. Protons and electrons are present in an atom in a neutral state in an equal number.
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suppose you begin preparing an experimental set-up, but find that one of your glass items has a crack in it. what should you do?
What you have to do to do an experiment, but find that one of your glass objects is cracked, then replace the cracked glass objects with new ones to avoid experimental errors.
Experiment explanationExperiment is a study conducted to find the result of something that is done intentionally by researchers.
Experimental research is also called an experiment which comes from the Latin "ex-periri" which means to test. Experimental research is an action and observation carried out to check hypotheses or identify causal relationships between symptoms. So, it can be said that the experiment is one of the research methods. In carrying out experimental research, you need to understand all matters relating to each experimental component, both components related to the types of variables, the nature of the experiment, characteristics, objectives, experimental requirements, experimental research steps to the form of experimental research design.
The purpose of experimental research is to find or determine the effect of an action on a particular group. Then, the results were compared with other groups that received different actions.
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the molar heat of vaporizationof water is 40.79 kj at 100oc. what is the heat of vaporization of 1 g of water?
The heat of vaporization of 1 g of water is 109J[tex]mol^-1k^-1[/tex].
It's far defined as the quantity of warmth required to elevate the temperature of one g of the substance thru 1 diploma Celcius. Molar warmness capacity: it's miles described as the amount of heat required to elevate the temperature of one mole of the substance thru 1 diploma celsius.
The molar warmth ability of a chemical substance is the amount of energy that should be delivered, inside the shape of warmth, to at least one mole of the substance so that it will cause an increase of 1 unit in its temperature. as an alternative, it's miles the heating ability of a pattern of the substance divided via the quantity of substance of the pattern; or also the precise heat potential of the substance instances its molar mass. The SI unit of molar warmth capacity is joule per kelvin consistent with mole, J⋅okay−1⋅mol−1.
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an atom has 20 protons, 20 neutrons, and 20 electrons. what atom is being described? an atom has 20 protons, 20 neutrons, and 20 electrons. what atom is being described? neodymium (atomic number 60) zirconium (atomic number 40) calcium (atomic number 20) neon (atomic number 10)
The very common form of calcium has 20 protons, 20 neutrons, and 20 electrons. This indicates that there are 20 protons in each calcium atom. and will have 20 electrons.
What does it mean to have a calcium atom?The chemical element calcium has the atomic number 20 and the symbol Ca. Calcium is a reactive metal that reacts with air to form a dark oxide-nitride layer because it is an alkaline earth metal. It has the most similar chemical and physical properties to its heavier homologues, strontium and barium. Calcium is a solid at room temperature and is categorized as an alkaline earth metal.
Atom :A chemical element is uniquely defined by its atom, a particle of matter. An atom has a central nucleus that is surrounded by one or more electrons with a negative charge. Protons and neutrons, two relatively heavy particles, are found in the positively charged nucleus.
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which molecules listed below are isomers? which molecules listed below are isomers? lactose and maltose glucose and fructose sucrose and glucose glucose and sucrose
Glucose and fructose are produced by degrading larger sugar molecules into disaccharides or polysaccharides. In contrast, the simplest form of fructose can be found in fruits and some vegetables.
What is the combined product of glucose and fructose?Because sucrose is a molecule of sugar that is composed of both glucose and fructose, it is referred to as a disaccharide. Sugar can be found naturally in whole foods as well as in processed foods that have added sugar.
Glucose or fructose, which sugar is better for you?It has little effect on health whether an added sugar contains more or less fructose than glucose. People with diabetes who need to control their blood glucose might be an exception, in which case a sugar with more fructose but less glucose might be preferable.)
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an electron in a 3s orbital penetrates into the region occupied by core electrons more than electrons in a 3p orbital?
Answer:
Explanation:
The penetration of an electron into the region occupied by core electrons is determined by the electron configuration and the energy of the orbital.
Electrons in 3s orbitals are lower in energy than electrons in 3p orbitals and are therefore closer to the nucleus. As a result, electrons in 3s orbitals penetrate more deeply into the region occupied by core electrons. This means that electrons in 3s orbitals are more strongly attracted to the positively charged nucleus, and have a higher probability of being found closer to the nucleus compared to electrons in 3p orbitals.
In contrast, electrons in 3p orbitals are higher in energy and have a more diffuse distribution, meaning they are less likely to penetrate into the region occupied by core electrons and are more likely to be found farther away from the nucleus.
In conclusion, electrons in a 3s orbital penetrate more deeply into the region occupied by core electrons than electrons in a 3p orbital.
If the temperature of a gas in a container is doubled on the Kelvin scale, what will happen to the pressure of the gas?
Explanation:
Pressure and temperature will both increase or decrease simultaneously as long as the volume is held constant. If temperature were to double the pressure would likewise double.
what is the vapor pressure of a solution of 0.114 mol of cholesterol in 6.72 mol of toluene at 32 degree c? at this temperature, the vapor pressure of pure toluene is 41 torr.
The vapor pressure of a solution of 0.114 mol of cholesterol in 6.72 mol of toluene at 32 degree is 40.6Torr.
The Raoult's Law equation may be used to determine the solution's vapour pressure:
Vapor Pressure of Solution = (Mol Fraction Cholesterol * Vapor Pressure Cholesterol) + (Mol Fraction Toluene * Vapor Pressure Toluene)
Mol Fraction Cholesterol =[tex]\frac{0.114}{ (0.114 + 6.72) }= 0.016[/tex]
Vapor Pressure Cholesterol = 0 (Cholesterol has no vapor pressure)
Mol Fraction Toluene =[tex]\frac {6.72}{(0.114 + 6.72)} = 0.984[/tex]
Vapor Pressure Toluene = 41 Torr
Vapor Pressure of Solution =[tex](0.016 * 0) + (0.984 * 41) = 40.6 Torr[/tex]
Therefore vapour pressure of solution is 40.6Torr.
Any of the lipids, a group of specific chemical compounds, include cholesterol. It is a sterol, which is a subclass of lipid. Toluene, sometimes called toluol, is an aromatic hydrocarbon that has been replaced. It is a colourless, insoluble in water liquid with a paint thinner-like odour.
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Calculate the mass of copper(II) sulfate produced. Show work!
CuO + H₂SO4 → CuSO4 + H₂O
FW CuSO4 159.602 g
g CuSO4=
=
Please I need it quickly pls
Explanation:
(1mol CuSO4/1mol CuO) x (159.602g CuSO4/1mol CuSO4) = 159.602g CuSO4