1. What is the mass percent of C in C2O? 2. What is the mass percent of Ca in CaBr2? 3. What is the empirical formula of a compound that is, by mass 90% C and the rest H? 4. What is the empirical formula if the sample is composed of 16g C and 16g O ? 5. 966 grams of an unknown hydrate of Na2SO4 are heated until reaching a constant mass of 426 grams , what is the empirical formula of the unknown hydrate of Na2SO4 ?

Q: A particular protein sample is found to have 1 atom of iron in its chemical formula. If the mass…

A: Mass percent expresses the solute concentration in any mixture. The division of weight of dissolved…

Q: Calculate mass percent of each element in perchoric acid, HCLO4 ?

A:

Q: Thymol, a substance used as an antiseptic in mouthwash, is composed of C, H, and O. When a 0.1658-g…

A: Empirical formula: The simplest positive integer ratio of atoms present in a compound is known as…

Q: Calcium Chloride CaCl2 has a molar mass of 110 grams per mole. 11.0 grams of CaCl2 dissolved in 500…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Fluorides of the noble gas xenon can be formed by reaction with fluorine under high temperature and…

A: Details

Q: What is the mass percentage of C in codeine, C₁₈H₂₁NO₃? Provide an answer to two decimal places.

A:

Q: What is the mass percentage of O in C₃H₈O₂? A) 21.03% B) 57.94% C) 72.58% D) 42.06%

A:

Q: What is the mass percentage of O in CO2? Provide an answer to two decimal places.

A: Given,  The mass percentage of O in CO2 is:

Q: A local water retention pond was found to have elevated mass concentration of mercury of 14 ng per…

A: Given data: Concentration of mercury = 14 ng/L Volume of water in swimming pool = 1250 m3   Known…

Q: The reaction of iron metal and chlorine gas to give iron{III) chloride is illustrated below. a.…

A: Note:  “Since you have posted a question with multiple sub-parts, we will solve first three…

Q: What amount in moles is 4.77x10^25 (to the power of 25) molecules?? 1.2.87x10^49 mol 2.79.2 mol…

A: Molecules = 4.77 x 1025

Q: a. What isthe percent by mass of water in iron (II) sulfate heptahydrate, FeSO4 • 7H2O  (or what…

A:

Q: The aluminum in a 0.767 g sample of an unknown material was precipitated as aluminum hydroxide,…

A: given: mass of sample of unknown material =0.767 g mass of aluminium oxide produced = 0.143 g…

Q: What's the percentage by mass of Cl in MgCl2 if it  is 24.6% Mg by mass?

A: Intrdouction : %age by mass of Mg = 24.6%

Q: 2XO3(g) → 2XO2(g) + O2(g) a. In the box on the right, draw the content of the sample after the…

A: The balanced chemical equation shows the relationship between the number of moles of reactants and…

Q: If 2.332 g of a sample containing a mixture of CuO and CuCO3 are heated, the final weight of the…

A: CuCO3 on heating decomposes to form CuO and CO2 CuCO3 (s) →heat CuO (s) + CO2 (g) 123.55 g…

Q: Hydrogen peroxide H2O2 is commonly used to clean bacteria in scrapes and cuts. It can be used as a…

A: 1 mol of a substance has   6.022×1023 (NA)   atoms/ molecules/ formula units of the substance.Number…

Q: If 34.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?

A: Given:Mass of  MgSO4⋅7H2O = 34.0 gWe need to find mass of anhydrous magnesium sulphate  produced…

Q: he doesn't have time to repeat the steps of heating, cooling crucibles, and remeasuring the mass.…

A: Amount of water in a hydrate is calculated by using the formula  Amount of water in a hydrated salt…

Q: A newly discovered metalloprotein, which contains four atoms of Mo per molecule of protein, is found…

A: The given values in the question are:Number of Molybdenum (Mo) atoms per molecule of protein = 4Mass…

Q: A mixture of CaCO₃ and CaO weighing 0.693 g was heated to produce gaseous CO₂. After heating, the…

A: Molecular mass The molecular mass is the mass of a given molecule. It is measured in Daltons. The…

Q: Calculate the mass percent of carbon in glucose (C6H12O6).

A: Dear student, since you have asked multiple questions but according to guidelines we will solve 1st…

Q: 1. In a certain compound of copper and oxygen, CuxOy, we find that a sample weighing 0.6349 g…

A: Molar mass of copper = 63.646 g/molMolar mass of oxygen = 16 g/molTotal mass of sample = 0.6349…

Q: A 800 mL sample of nitrogen (N2) was col- lected by displacement of water at 24°C un- der a total…

A: Hii there, since there are multiple questions posted. We are entitled to  answer first question. If…

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.