Magnesium oxide (MgO) forms when the metal burns in air.(a) If 1.25 g of MgO contains 0.754 g of Mg, what is the massratio of magnesium to oxide? (b) How many grams of Mg are in534 g of MgO?

Q: What is the mass of 2.11x1024 molecules of C,H6?

A: 1mole of any substance contains Avogadro no. or 6.023×10^23 no. of molecules. The rest is solved by…

Q: What mass of c37h49n2o12 would contain 4.35g of oxygen? What is the mass of exactly 1500 molecules…

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Q: (a) In the certain hydrated salt MSO3-4H2O, the mass percentage of H2O is 44.71%. Identify the…

A: According to the answering guidelines, I'm posting the solution for the first question. Kindly post…

Q: E4. If aluminum (Al), with an atomic weight of 27, combines with oxygen (O), with an atomic weight…

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Q: What is the mass in grams of 250 liters of oxygen gas,O2?

A: 1 mole of a gas occupies 22.4 L.

Q: What is the molecular mass of iron (III) oxide (Fe2O3)? Enter your answer rounded to four sig figs,…

A:

Q: What is the mass percentage of each element in the compound Al2 O3? Enter the percent mass of…

A: Al - 53%O - 47%

Q: One of the hydrates of NazCr0, is sodium chromate decahydrate. A 56.6 gram sample of NazCr04 10 H,O…

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Q: A sample of hydrate was heated thoroughly. How many waters of hydration are there if the anhydrous…

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Q: A given sample of a xenon fluoride compound contains molecules of a single type XeFn , where n is…

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Q: What is the mass of calcium in grams in 9.07 g of calcium hypochlorite?

A: 9.07 g of Calcium hypochlorite is taken.

Q: In an experiment 0.500 gg of copper reacted with oxygen to give 0.563 gg of copper oxide. What is…

A: Answer 1:       Mass percentage of copper in copper oxide = given mass of coppergiven mass of copper…

Q: why at the end do you write mass of O2, but then didn't do 32g as the multiplier?

A: To calculate mass of O2 , first moles are calculated and then 32.0 g/mol would be used as multiplier…

Q: A student obtains a mixture of the chlorides of two unknown metals, X and Z. The percent by mass of…

A: Given: Mixture of metal X and Z. And mass percent of X and Z in the mixture.

Q: The molar mass of caffeine is 194.19 g. Is the molecularformula of caffeine C4H5N2O or C8H10N4O2?

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Q: What is the mass of carbon in grams found in one molecule of the compound C7H8O4?

A: The atomic mass of carbon is 12 g. Thus, the mass of one atom of carbon in the molecule is…

Q: experiment was done to determine the composition of a mixture of sodium chloride and sodium…

A:

Q: How many moles are there in a copper wire that has a mass 10.234 g?

A: Since you have posted multiple questions, we are entitled to answer the first only. And since you…

Q: What is the mass, in kilograms, of an Avogadro’s number ofpeople, if the average mass of a person is…

A: The average mass of person is 160 lb. One pound is equal to 0.4535 kilograms.

Q: The low-grade iron ore taconite, which contains Fe3O4, is concentrated and made into pellets for…

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Q: Acetaminophen is the generic name of the pain reliever in Tylenol and some other headache remedies.…

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Q: What mass of hydrogen gas H2 is present if there are 5.00E23 atoms of hydrogen?

A: Given: Atoms of hydrogen are 5.00×1023 To find: Mass of hydrogen gas

Q: What mass in grams of Cu(IO3)2 can be produced from 0.750 g of CuSO4 x 5H2O?

A:

Q: 1. The following quantities are placed in a container: 1.5 x 1024 atoms of hydrogen, 1.0 mol of…

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Q: (a) What is the mass, in grams, of 1.223 mol of iron(III)sulfate?(b) How many moles of ammonium ions…

A: (a) Given, Moles of iron (III) sulfate is 1.223 mol Molar mass of iron (III) sulfate is 399.88 g/mol…

Q: What is the mass, in kilograms, of an Avogadro’s number ofpeople, if the average mass of a person is…

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Q: The recommended daily intake of salt, NaCl, is about 1 teaspoon = 2.3 g salt.  If the molar mass of…

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Q: A well-known reagent in analytical chemistry, dimethylglyoxime, has the empirical formula C2H4NO. If…

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Q: An experiment in the lab requires 0.03 g of sodium chloride, which is a substance that is safe for…

A: I can dispose the exess NaCl by throwing it in to the basin .

Q: a) What is the mass, in grams, of 2.50 x 10-3 mol ofammonium phosphate?(b) How many moles of…

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Q: What is the molar mass of the imaginary compound (NH4)2(SO2) ?   State your answer in two decimal…

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Q: The molecular formula of aspirin is C9H8O4. How many aspirin molecules are present in one…

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Q: What is the mass percentage of O in C3H,O,?

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Q: If 5.9 × 10²⁵ molecules of CO₂ are produced in a combustion reaction, what is the mass in kg of CO₂…

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A: Black powder contains 75% by mass potassium nitrate, 15% by mass charcoal, and 10% by mass sulfur.

Q: 4. a) How many particles ( b) What is the mass in grams of that salt? )are there in 1.25 moles of…

A: No. of particle = mol * NA     where NA is Avogadro number.

Q: A sample of unknown hydrate, AC·XH2O, has a mass of 1.000 g before heating and a mass of 0.781 g…

A:

Q: The molecular formula of allicin, the compound responsiblefor the characteristic smell of garlic, is…

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Q: A compound M2O3 is 30.06% oxygen, where M is an unknown metal. The molar mass of M2O3 is?

A:

Q: Calculate the percentage by mass of the indicated element inthe following compounds: (a) carbon in…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: In the certain hydrated salt MSO3⋅4H2O, the mass percentage of H2O is 44.71%.   Identify the element…

A: Mass percent is given by the mass of the molecule/atom by total mass multiplied by 100.

Q: 2) If 28.9g of Lithium Nitride react, how many grams of Magnesium Carbonate are needed to react with…

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Q: Table salt, NaCl(s), and sugar, C,,H„0(s), are accidentally mixed. A 5.50 g sample is burned, and…

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Q: What is the molecular mass of chloroform if 0.0275 mol weighs 3.28 g?

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Q: If a sample of iron(III) sulfide contains 5.00x10^15 iron atoms, what is the mass of the sample in…

A: Given,  No. of Fe atoms = 5.00×1015 atoms of Fe molar mass of Fe2S3 = 207.9 g mol-1 mass of Fe2S3 =…

Q: The molecule Al(OH), has Al atom(s), O atom(s) and v H atom(s). Therefor, the molar mass of Al(OH),…

A: Molar mass is the mass of a chemical element divided by the amount of substance (mol). It can be…

Q: How many molecules of carbon dioxide, CO2, comprise 2.55 grams?

A: 44 g of CO2  comprises  1 mole1 mole of CO2(44 g) contains  6.022 X 10 23 molecules 2.55 g of CO2…

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Q: 4. A sample of acetic acid has 4.22x1024 molecules. How many grams of hydrogen are present?

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.