The molar mass of magnesium sulfate heptahydrate, mgso4·7h2o is 246 g/mol.
Molar mass simple: What is it?The mass in grams of one mole of a substance is known as its molar mass. The symbol for molar mass is g/mol, or grams per mole.
Why is it referred to as molar mass?The total mass of all the atoms that make up a mole of a specific molecule, measured in grams, is known as the molar mass or molecular weight. The measurement is made in grams per mole.
What does MgSO4 7H2O's molecular formula look like?Magnesium sulfate heptahydrate, often known as epsomite, is a mineral with the chemical formula MgSO47H2O. Epsomite often takes the form of vast encrustations, however the orthorhombic system can occasionally produce acicular or fibrous crystals.
Molar mass of MgSO₄⋅ 7H₂O:
Molar mass = 24.305 + 32.065 + 16×4 + 7 (1.008×2 +16)
Molar mass = 24.305 + 32.065 + 64 + 7 (18.016)
Molar mass = 24.305 + 32.065 + 64 + 126.112
Molar mass = 246.482 g /mol
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which scientist is responsible for the theory that explains why properties of elements recur in a periodic fashion
The scientist responsible for the theory that explains why properties of elements recur in a periodic fashion is Dmitri Mendeleev.
According to Dmitri Mendeleev and Lothar Meyer, who separately formulated the periodic law, "when the elements are organised in order of increasing atomic mass, certain sets of properties recur periodically." John Newlands noticed a pattern when he arranged the elements according to their atomic mass, or weight. He discovered that every eighth element appeared to have the same qualities. The periodic law and a periodic table provided by Mendeleev served as the basis for the creation of the present periodic table. Mendeleev claimed that an element's periodic characteristics are a periodic function of its atomic number.
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groups of atoms with characteristic chemical features and properties are called
Answer:
functional group
Explanation:
acetylene is a fuel used in welding torches. calculate the heat released in the reaction for the combustion of acetylene
Acetylene and oxygen are converted throughout the process into carbon dioxide and water vapour, producing 566 kJ of heat for each mole of acetylene burned.
The heat released throughout the process may be calculated using the change in enthalpy, often known as the heat of reaction or the enthalpy of reaction. Using the enthalpy values of the products and reactants, one can determine the change in enthalpy, which is determined by the difference between the enthalpies of the products and the reactants. The balanced chemical equation for the burning of acetylene is 2 C2H2 + 5O2 4 CO2 + 2 H2O, and the change in enthalpy, or heat released, is -566 kJ/mol. This indicates that the process transforms acetylene and oxygen into carbon dioxide and water vapour, releasing 566 kJ of heat for every mole of acetylene burnt.
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we can only do ideal calculations when we are at standard temperature and pressure.
False. Not only at standard temperatures and pressures, but also at any other temperature and pressure, ideal computations can be performed.
What are the typical pressure and temperature?STP, or standard temperature and pressure, refers to the nominal atmospheric conditions at sea level. The temperatures and pressures are 0 ° Celsius and 1 atmosphere, respectively.
What purpose does STP serve in chemistry?The term for standard temperature & pressure in chemistry is STP. STP is most frequently used when calculating gas properties, like gas density. A standard pressure equals 1 atm, and the standard temperature equals 273 K (0° C or 32° F).
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The complete question is-
We can only do ideal calculations when we are at standard temperature and pressure.
Group of answer choices
A) True
B) False
the total number of protons and neutrons for an atom equals the ______.
Answer:
Your answer is: Mass Number
Explanation:
CaCl2 is a salt that forms as the result of what type of bond?
Ionic bonds, which hold the ions together, result in an ionic compound. In most cases, ionic compounds are created between metal and nonmetal components.
CaCl2 is a form of salt, right?A calcium salt, an inorganic chloride, and an inorganic calcium salt all make up calcium dichloride. It functions as fertilizer. The ionic compound calcium chloride is created when calcium and chlorine interact. It is highly water soluble and liquescent.
How is the CaCl2 bond created?Calcium chloride (CaCl2) is mostly created when hydrochloric acid reacts with limestone (CaCO3) (HCl). You can write the chemical equation like this. It is also created as a key by-product in the Solvay process, which involves reacting limestone with NaCl solution to make soda ash Na2CO3.
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The isomerization of cyclopropane to propylene is a first-order process with a half-life of 19 minutes at 500 °C. The time it takes for the partial pressure of cyclopropane to decrease from 1.0 atmosphere to 0.125 atmospheres at 500 °C is closest to... (A) 38 minutes (B) 57 minutes (C) 76 minutes (D) 152 minutes (E) 190 minutes
t = 57 min., Therefore, we can say that it takes 57 minutes for cyclopropane's partial pressure to drop from 1 atm to 0.125 atm at 500°C.
Is the first-order isomerization of cyclopropane to propylene?Propene (CH3CH=CH2) is produced by the isomerization of cyclopropane, which is a first-order process. A sample of cyclopropane converts to propene in 79 minutes at 760 K.
Isomerization: first-order reaction or not?The reaction is a first-order reaction because it is an isomerization reaction, and its rate constant is expressed in terms of minutes. The sum of the powers or exponents that the concentration terms are raised in the rate law expression can be used to define the order of a reaction.
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4 NH3 +502 → 4 NO + 6 H₂O
a) What is the mole ratio of O₂ to NH3?
b) What is the mole ratio of NO to NH3?
c) How many moles of NH3 are produced from 0.542 moles of H₂O?
d) How many moles of NO are needed to react with 3.4 moles of O₂?
e) How many grams of O₂ are needed to produce 1.25 moles of NH3?
The mole ratio O₂ to NH[tex]_3[/tex] in the reaction 4 NH[tex]_3[/tex]+50[tex]_2[/tex] → 4 NO + 6 H₂O is 5:4. Mole is one of the International System of Units.
What is mole?A mole is merely a measuring unit. In reality, it is one of the International System of Units' seven foundation units (SI). When basically determines are insufficient, new units are created.
Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading. As a result, scientists devised the mole could bridge the divide between extremely small and extremely huge numbers. The mole ratio O₂ to NH[tex]_3[/tex] in the reaction 4 NH[tex]_3[/tex]+50[tex]_2[/tex] → 4 NO + 6 H₂O is 5:4.
Therefore, the mole ratio O₂ to NH[tex]_3[/tex] in the reaction 4 NH[tex]_3[/tex]+50[tex]_2[/tex] → 4 NO + 6 H₂O is 5:4.
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What question did Mendeleev use to guide his science inquiry
Mendeleev used the question "What is the underlying pattern that governs the properties and relationships of elements?" to guide his scientific inquiry and eventually lead to the creation of the periodic table of elements.
What is a periodic table?According to their atomic number, electron configurations, and chemical properties, elements are arranged in the periodic table. To display the recurring patterns of an element's chemical and physical properties, it is arranged in rows and columns. Each element has a distinctive symbol that denotes its atomic number, and the elements are listed in ascending order of atomic number. A crucial tool for chemists, the periodic table is used to forecast the properties of new elements as well as the chemical behavior of existing elements. A periodic table is a crucial tool for scientists working in the fields of chemistry, physics, and other sciences.
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what type of digestion uses the various secretions of the gi tract to break down foods?
Chemical digestion reduces food into smaller molecules that the body may absorb using the various GI tract secretions.
What is GI tract?The system of organs in the body that digests and absorbs food is known as the GI tract, or gastrointestinal tract. The mouth, oesophagus, stomach, small intestine, large intestine, rectum, and anus are all parts of the GI tract.
The two forms of digestion that take place in the gastrointestinal system are mechanical and chemical. By chewing and grinding, food is physically broken down during mechanical digestion.
Gastric juices, pancreatic juices, bile, and intestinal juices are among the secretions involved in chemical digestion. The hydrochloric acid and the pepsin enzyme found in the stomach's gastric secretions help break down proteins into smaller peptides. Trypsin and chymotrypsin, two enzymes that continue the breakdown of proteins, as well as lipases and amylases that break down lipids and carbs, are all present in pancreatic secretions.
Bile, which is created by the liver and kept in the gallbladder, emulsifies lipids and aids in balancing the stomach's acidic chyme. The final step in the breakdown of carbs, proteins, and lipids into their smallest absorbable units is completed by additional enzymes found in digestive fluids.
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the atmospheric pressure of the day is 1,086.9 torr and the temperature of the water is 27 c. what is the pressure of the hydrogen gas? express your answer in torr
The pressure of the hydrogen gas is 79.37 torr.the atmospheric pressure of the day is 1,086.9 torr and the temperature of the water is 27 c.
The pressure of the hydrogen gas can be calculated using the ideal gas law, which states that Pressure = (Number of moles x Gas Constant x Temperature) / Volume. In this case, the number of moles would be 1, the gas constant would be 0.08206 L atm mol-1 K-1, the temperature would be 300K, and the volume would be 1L.
p= nrt/v
= 1* 0.08206 L atm mol-1 K-1*300K/1L
= 79.37 torr
PV = nRT, can be used, 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. In order to find the pressure of hydrogen gas, information about its volume, amount, and temperature must also be known.
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which is true about the structure of the atom? select the correct answer below: most of the mass is outside the nucleus. most of the atom is empty space. electrons are found inside the nucleus. neutrons are found outside the nucleus.
Most of the atom is empty space is true about the structure of the atom. Option B is correct.
Atomic structure will refers to the structure of an atom which is comprising a nucleus (centre) in which the protons (positively charged) as well as neutrons (neutral) are present. The negatively charged particles known as electrons which revolve around the centre of the nucleus.
The majority of the mass of an atom is concentrated in its nucleus, which is comprised of protons and neutrons. Electrons occupy the space around the nucleus, forming a cloud-like electron cloud that takes up much more space than the nucleus. Neutrons are found inside the nucleus, along with protons.
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--The given question is incorrect, the correct question is
"which is true about the structure of the atom? select the correct answer below: A) most of the mass is outside the nucleus. B) most of the atom is empty space. C) electrons are found inside the nucleus. D) neutrons are found outside the nucleus."--
a mixture of argon and mercury vapor used in advertising signs emits light of wavelength 670 nm. calculate the energy change resulting from the emission of 1.00 mol of photons at this wavelength.
The energy change resulting from the emission of 1.00 mol of photons at a wavelength of 670 nm is 2.45 x 10^5 J.
The Energy Change of Photon EmissionThe energy change resulting from the emission of photons can be calculated using Planck's equation, E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength of the light. By substituting the values for these variables and multiplying them by Avogadro's number, we can find the energy change resulting from the emission of a certain amount of photons at a specific wavelength. In the case of a mixture of argon and mercury vapor used in advertising signs that emits light at a wavelength of 670 nm, the energy change resulting from the emission of 1.00 mol of photons is 2.45 x 10^5 J. This calculation highlights the relationship between the energy of photons and their wavelength and demonstrates how the energy of a specific photon emission can be determined.
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what are the weathering products of these common minerals: quartz, feldspar, amphibole, pyroxene, biotite, muscovite?
The weathering products of the following minerals are:
Quartz: silica gel; Feldspar: clay minerals (such as kaolinite); Amphibole: iron and magnesium-rich clay minerals; Pyroxene: iron and magnesium-rich clay minerals; Biotite: iron and magnesium-rich clay minerals; Muscovite: aluminum-rich clay minerals.
Weathering is the process by which rocks and minerals are naturally broken down and altered due to exposure to environmental factors such as water, air, and temperature changes. Over time, these minerals can undergo chemical reactions that cause them to change into new substances.
Quartz: Quartz is one of the most abundant minerals on Earth and is relatively resistant to weathering. However, over time, water and other natural forces can cause it to break down into silica gel, a soft, sponge-like material.
Feldspar: Feldspar is a common mineral found in many types of rock, including granite and basalt. When exposed to weathering, feldspar breaks down into clay minerals, such as kaolinite, which are rich in aluminum and silicon.
Amphibole: Amphiboles are a group of minerals that contain iron, magnesium, and other elements. When exposed to weathering, amphiboles break down into iron and magnesium-rich clay minerals, which can then mix with other minerals and organic materials to form soils.
Pyroxene: Pyroxenes are a group of minerals that are similar in composition to amphiboles, and they also break down into iron and magnesium-rich clay minerals when exposed to weathering.
Biotite: Biotite is a type of mica mineral that is commonly found in many types of rock, including granite and basalt. When exposed to weathering, biotite breaks down into iron and magnesium-rich clay minerals, which can then mix with other minerals and organic materials to form soils.
Muscovite: Muscovite is a type of mica mineral that is abundant in many types of rock, including granite and gneiss. When exposed to weathering, muscovite breaks down into aluminum-rich clay minerals, which can then mix with other minerals and organic materials to form soils.
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"Which one of the following can be classified as a strong electrolyte?
A) C₆H₁₂O₆
B) CH₃OH
C) NH₄NO₃
D) HC₂H₃O₂
E) H₂O"
Explanation:
C) NH₄NO₃ can be classified as a strong electrolyte
a reactant decomposes with a half-life of 103 s when its initial concentration is 0.336 m. when the initial concentration is 0.573 m, this same reactant decomposes with the same half-life of 103 s. what is the order of the reaction? 2 1 0 what is the value and unit of the rate constant for this reaction?
The half-life of a reaction is independent of the initial concentration and remains constant for a given reaction, hence the half-life of 103s is the same for both initial concentrations.
Determining the Order and Rate Constant of a Chemical ReactionA chemical reaction's rate can be described by its order and rate constant. The order of a reaction refers to the power to which the concentration of each reactant is raised in the rate equation. For example, if a reaction is first order, the rate is proportional to the concentration of one of the reactants raised to the power of 1. On the other hand, if the reaction is in zero order, the rate is independent of the concentration of the reactants. To determine the order of a reaction, you would need to examine the effect of changing the concentration of the reactants on the rate of the reaction
The rate constant, on the other hand, is a measure of the speed of the reaction and has units of reciprocal time (e.g. per second). It is determined from the rate equation and can be used to predict the rate of the reaction under different conditions. To find the rate constant, you would need to measure the rate of the reaction at a specific temperature and concentration.
It is important to note that the half-life of a reaction is independent of the initial concentration and remains constant for a given reaction. The half-life of a reaction is defined as the time taken for the concentration of a reactant to decrease to half its initial value.
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Water consists of one oxygen atom joined to two hydrogen atoms by what type of bonds?
Answer:
covalent
Explanation:
as opposed to ionic bonds
Changing gloves often will minimize the spread of chemicals. to properly remove gloves, first, choose... , and then, choose... . then insert choose... between the interior edge of the second glove and the skin, and remove the second glove.
Choices:
-grasp the exterior of one glove with a gloved hand -grasp the exterior of one glove with a bare hand -insert a gloved finger into one glove
The distribution of chemicals will be reduced by frequently changing gloves. Gloved hands should be used to initially grab one glove's outer before peeling the first glove off. Next, put in a single finger.
What's a chemical term in simple terms?A chemical is any substance whose constitution is known. A biochemical always consisted of the same "substance," to put it differently. Water is one of the substances found in nature. Manufacturing facilities produce substances like chlorine.
How elements comprise chemicals?Matter, which is everything made of atoms, is also known as compounds. Neutrons can now be used as the building blocks in a LEGO set to produce compounds. They may take any form, including solid, aqueous, or gas.
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A large beaker of water is filled to its rim with water. a block of wood is then carefully lowered into the beaker until the block is floating. in this process, some water is pushed over the edge and collects in a tray. the weight of the water in the tray is?
Weight of water = V * 1000 kg/m^3 * 9.8 m/s^2 = V * 98000 N/m^3
What is weight?
The weight of an object is described as the force acting on the object due to gravity.
The weight of the water pushed over the edge of the beaker will be equal to the buoyant force acting on the floating block of wood, hence the buoyant force is equal to the weight of the water displaced by the block.
We can calculate using the following formula:
Weight of water = Volume of water displaced * Density of water * g
We do not have the values of V
Weight of water = V * 1000 kg/m^3 * 9.8 m/s^2 = V * 98000 N/m^3
In conclusion, this weight will be in Newtons, which is the unit of force. \
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what did the arabs find when they searched the alchemist? why did they allow the alchemist to keep the treasure?
The Arabs find that when they searched the alchemist is that the alchemist was carrying the some stone and some oil, and they thought he was just joking and the stone was carrying a worthless stone .
When the Arabs find when they searched the alchemist, that the alchemist was carrying the some stone and the flask filled with the some oil, and Arabs thought that he was just joking and the stone that he was was carrying is a worthless stone and some oil.
The Arabs when realize that it was the elixir of the life and the philosophers Stone.
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the science of carbon-containing molecules is known as