Consider a sample of calcium carbonate in the form of a cubemeasuring 2.005 in. on each edge. If the sample has a densityof 2.71 g/cm3, how many oxygen atoms does it contain?

Q: A 0.370-mol sample of a metal oxide (M₂O₃) weighs 55.4 g.(a) How many moles of O are in the…

A: Mass of 0.37 mole of metal oxide = 55.4 g. Mass of one mole of metal oxide = Molar mass of the metal…

Q: 3.120 A mixture of NaBr and Na2SO4 contains 29.96 percentNa by mass. Calculate the percent by mass…

A: Solution- Molar masses of alll which we required-Na-23.00 g/molBr- 32.07 g/molS- 16.00…

Q: Sait efflorescent A hydrated salt is 21% water (anhydrous formula weight is 136.1). a. How many…

A: Some chemical compounds on crystallization from water solution produce a crystal that contains water…

Q: A compound is isolated from the rind of lemons that is found to be 88.14% carbon and 11.86% hydrogen…

A: We have to calculate the mass of C and H.

Q: (a) Does the percent by mass of each element in a compounddepend on the amount of compound? Explain.…

A: a) In a molecule of calcium chloride, there is one calcium atom and two atoms of chlorine. The total…

Q: A hydrate of Na2CO3 has an initial mass of 4.31 g before heating and 3.22 g after.      What is the…

A: The initial mass of hydrate of Na2CO3 before heating is = 4.31 g The mass of Na2CO3 after heating is…

Q: (a) What is the mass, in grams, of one mole of 12C? (b) Howmany carbon atoms are present in one mole…

A: (a) Molar mass of Carbon-12 is 12.01 g/mol. Hence, 12.01 g of pure carbon-12 is known as one mole of…

Q: A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What…

A: we  need to calculate mass of Pb in the ore

Q: A tube of Thothpaste contains 0.76 g of sodium monofluorphosphate (Na2PO3F) in 100 mL. a)what mass…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: Q;) a compound is found to contain 40 % carbon, 6.7 % hydrogen, and 53 % oxygen by weight. What is…

A: Answer:- this question is answered by using the simple concept of calculation of epirical formula…

Q: How many grams of carbon tetrabromide contain 2.48 grams of Br ?

A: grams of carbon tetrabromide contain 2.48 grams of Br  will be found like this:

Q: 1) How many zinc (Zn) atoms are contained in 5.16 moles of Zn?

A: Mole is described as the amount of a substance which consist of  exactly the Avogadro number of…

Q: Consider a 1.245 g sample of glucose (C H, O.). Calculate the following. moles of glucose in the…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: A sample of the compound shown below contains 5.22 g of nitrogen. How many grams of oxygen does it…

A:

Q: What is the % composition of chlorine in KCI?

A:

Q: 9.) How many moles of glucose, C6H1206 are in: (a). 538grams (b.) 1.00 grams of this substance?

A: The molar mass of a compound is furnished as the mass occupied by one mole. Hence the ratio of the…

Q: A 0.370-mol sample of a metal oxide (M2O3) weighs 55.4 g. (a) How many moles of O are in the sample?…

A: A 0.370-mol sample of a metal oxide (M2O3) weighs 55.4 g. (a) How many moles of O are in the sample?…

Q: A chemist is given a sample of the CuSO4 hydrate and asked to determine the empirical formula of it.…

A: Given,  Mass of hydrated CuSO4 = 42.75 g Mass of Unhydrated salt = 27.38 g  Formula of hydrate = ?

Q: Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). The…

A: The given data: The number of carbon atoms present in cortisone = 21 The mass % of the carbon in…

Q: A certain organic compound has the formula C9H11O2.  A sample of this compound weighs 85.88 grams.…

A: The formula of the given organic compound is C9H11O2.  Mass of the compound=85.88 grams. The molar…

Q: One mole of water contains 6.022 × 1023 hydrogen atoms

A:

Q: C4H10 and C6H12 are both hydrocarbons. Whic one contains higher mass percentage of carbon?

A:

Q: What is the empirical formula (Na?S?O?) for a pure compound consisting of 29.1% sodium, 40.6%…

A: Empirical formula is represents the simplest ratio of atom in a compound.

Q: What is the percent by mass N in Magnesium Nitrate?

A: Atomic mass of N =  14 g mol-1 Molar mass of Magnesium Nitrate (Mg(NO3)2) = 148.3 g mol-1

Q: H Identify the element that has the highest mass percent composition in C,H120. Он Oc Identify the…

A: Applying concept of%mass of elements.

Q: An essay written by carbon pencil on a paper weighs 0.5 mg. How many carbon atoms present in the…

A:

Q: A 3.87g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.30x1022 N2O…

A: a) 1 molecule of N2O contains 2 nitrogen atoms, Hence, 5.30 ×1022 N N2O molecules will contain…

Q: Consider a sample of calcium carbonate, CaCO3 (100.09 g/mol), in the form of a cube measuring 2.88.…

A: The length of the cube of calcium carbonate, CaCO3 =2.88 cm The density of the calcium carbonate,…

Q: A chloride of silicon contains 79.1 mass % Cl. (a) What is theempirical formula of the chloride? (b)…

A: Empirical formula It gives the simplest whole number ratio of elements present in a compound. It is…

Q: f 37.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?…

A: On strong heating, water molecules get removed and turn hydrated salt into anhydrous salt.The…

Q: Paris green is a highly toxic emerald green compound with the formula Cu(C2H3O2)2. 3Cu(AsO2)2. What…

A: GivenThe formula of the Paris green

Q: A binary compound between an unknown element E and hy- drogen contains 91.27% E and 8.73% H by mass.…

A: using the molecular formula is E3H8 Given moles of E presents in compound is 3

Q: Consider a sample of calcium carbonate in the form of a cube measuring 2.605 in.in. on each edge. If…

A:

Q: An experiment requires that enough PNCl2 be used to yield 10.3 g of chlorine. How much PNCl2 must be…

A: Answer: 16.84 g

Q: If 10 magnesium (Mg) atoms and 10 chlorine (Cl) atoms bump into eaxh othee, could they form a…

A:

Q: 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A: Mass of Sample = 0.933 gMass of Nickel Nitride = 1.081 gmoles of Nickel in sample = To be determined…

Q: bone Titanium metal is usefuu as a heplacement matenial. Delemine the mass in grams o625.5 moles 06…

A: The moles of a compound can be calculated as follows: Moles of compound=Mass of compoundMolar mass…

Q: What mass in grams of TNT can be made from 598 g C7H8?

A:

Q: Give the empirical formula of each of the following compoundsif a sample contains (a) 0.0130 mol C,…

A:

Q: 2. How many grams of chocolate are there in 84.0 X 102 molecules of chocolate, C,H,N,0,?…

A: To determine the grams of chocolate in 84.0×1022 molecules of chocolate C7H8N4O2

Q: 1. An essay written by carbon pencil on a paper weighs 0.5 mg. How many carbon atoms present in the…

A:

Q: The composition of a commercial cold remedy mixture is 87% aspirin, 7% caffeine, 6% vitamin C. What…

A: Mixture composition  87% aspirin 7% caffeine 6% vitamin C Mass of mixture that has 5 g Caffeine =?

Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO,…

A: Given: Percent by mass of CO32- ions in sample = 69.14 %

Q: 4. If the manufacturer of Remdesivir has access to 1394 g of phosphorus atoms, how many grams of…

A: The chemical formula of Ramdesivir: C27H35N6O8P. The given mass of phosphorus atoms = 1394 g Atomic…

Q: How many grams of oxygen does it contain? What is the percentage by mass of nitrogen in the…

A:

Q: 19 How many nitrogen atoms are present in 25.00 g of N,O,?

A:

Q: asolim and water (H,O). What mass of water is produced by the reaction of 7.74 g of octane?

A: The balanced equation for the combustion of octane is,                                    2 C8H18+25…

Q: You are given 1.0g samples of Iron (Fe), Silicon (Si), and Lithium (Li). Which of the three samples…

A: Applying mole concept and avogadro concept.

Q: The density of carbon tetrachloride is 1.59 g/mL. How many moles are present in 50.0 mL of carbon…

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.