What is the % nitrogen by weight in 7 g of (NH4)2S (ammonium sulfide)? Answer in units of %.

Q: What is the molar mass of sodium carbonate (Na2CO3)? g/mol Your answer should be rounded to the…

A: SOLUTION  Atomic mass of Na = 22.989g/mol Atomic mass of C = 12.01g/mol Atomic mass of O =…

Q: How many moles of oxygen atoms are in 5.3E-1 moles of CO2?

A: Given: Moles of CO2 = 0.53 mol.

Q: how Many moles are they

A: Given :- mass of CO2 =1100 g  To calculate :- number of moles of CO2

Q: What is the percent by mass of lithium in Li,O?

A: Percent by mass = (mass of Li/mass of Li2O) × 100%

Q: how many moles of NaCl is in a 67.893g sample?

A: Since, Moles is defines as mass to the molar mass of that species. Thus,

Q: 4. What is the percent by of oxygen in ethylene glycol, C,H,(OH),? mass The answer is

A: The molecular formula of ethylene glycol is = C2H4OH2 The mass percent of oxygen in ethylene glycol…

Q: number should be placed in front of CaSO4 to give the same total number of sulfate

A: The number should be placed in front of CaSO4 to give the same total number of sulfate ions on each…

Q: How many hydrogen atoms are in 7.50 mol of ammonium sulfide? H atoms

A: The formula of ammonium sulfide is NH42S. In the formula of ammonium sulfide NH42S, there are 2 N…

Q: The percent by mass of manganese(II) in MnSO3 is %.

A:

Q: Find the percentage oxygen by weight in KMnO4.

A: Percentage by mass – Formula is, This is formula for liquids. But for certain element present in a…

Q: How many moles of NH3 can be produced from 12.0 mol of H2 and excess N2? Express your answer…

A: The balanced reaction between N2 and H2 to produce ammonia is shown as,

Q: The percent by mass of copper(I) in Cu,CO3 is %.

A:

Q: The number of moles in 10.0 grams of CO2 is

A: Number of moles  = Given weight (g)/ Molar mass (g/mol)

Q: Calculate the molar mass for the following fictitious hydrate. Report your answer with one place…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: A shot of espresso contains roughly 64mg of caffeine, C8H10N4O2.  - Provide the molar mass of…

A:

Q: What is the percent yield if 5.27 g of copper are produced when 1.87 g of aluminum react with an…

A: Given that: mass of copper = 5.27 g mass of aluminium = 1.87 g The reaction is, 2Al (s) + 3CuSO4…

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: Convert from 277 moles of ammonium chloride, NH4CI to grams.

A: Ammonium chloride is a salt that contains one nitrogen atom, four hydrogen atoms, and one chlorine…

Q: What is the molar mass of H2CO3? Enter your answer rounded to four sig figs, without units

A: Molar mass of a substance is calculated by the numerical sum of atomic masses.

Q: What quantity in moles of LiBr are in 75.6 grams of LiBr?

A:

Q: Determine the empirical formulas for the compounds with the following percentage compositions. 31.…

A: Given composition is, %Carbon= 80.04 %Hydrogen = 19.96

Q: What is the percent composition by weight of hydrogen in the following compound? C;H,O2 Enter your…

A: Percentage composition of any atom in a molecule can be taken out with the help of mass of atom and…

Q: If 0.274 moles of a substance weight 62.5 g what is the molar mass of the substance in units of…

A: as we know,                      number of moles = mass / molar mass                    molar mass=…

Q: What is the percent by mass of iron (Fe) in FeCO3?

A: Molar Mass of FeCO3 = 115.85 g/mol Weight of 1 Fe atom =55.85 Weight of 1 C atom = 12 Weight of 3 O…

Q: How many molecules are in 5.00 g of Iron II Sulfite?

A: The molecular formula of Iron (II) Sulfite is FeS  hence the molar mass of FeS = Atomic mass of Fe +…

Q: What is the percent composition by mass (to one decimal place) of Oxygen and hydrogen in 1 mol of…

A: The mass of 1 mol of atoms is called atomic mass For example :-  Atomic mass of H = 1.0 g/mol Atomic…

Q: Aspirin, C9H8O4, is a common pain reliever and is also often given in low doses daily for prevention…

A: Given :- number of moles of aspirin (C9H8O4) in sample = 0.0745 mol  To calculate :- mass of aspirin…

Q: The percent by mass of cobalt(III) in CoI3 is %.

A: Compound = CoI3 Molar mass of Co = 59.0g/mol Molar mass of I = 127g/mol Molar mass of CoI3 =…

Q: Given 10g of MgCl2 and 16g of AgNO3 and actual yield of 1.099g of AgCl, what is the theoretical…

A: Reaction equation:

Q: Mass % of H in ammonium bicarbonate

A: Answer: 6.38%

Q: 2 NH3 + 3 CuO --> 3 Cu + N₂ + 3H₂O In the above equation how many moles of N₂ can be made when 170.6…

A: Given equation,  2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2O Molar mass of N2 = 14+14 = 28 g.mol-1 Molar mass…

Q: what is the percent by mass of tungsten in the calcium tungstate compound CaWO3, COMMONLY called…

A: Molar mass of tungsten, W = 183.84 g/molMolar mass of calcium tungstate, CaWO3 = 40 + 183.84 + (3 ×…

Q: A sample of aspirin (acetyl salicyclic acid) of molecular mass 180, on analysis was found to contain…

A: Given data contains, Mass percentage of carbon in aspirin is 60%. Mass percentage of hydrogen in…

Q: how many grams of S4O4 are their in 14.4 moles  of S4O4

A: Molar mass of S4O4 can be calculated as: Molar mass = (4×Molar mass of S) + (4×Molar mass of O) =…

Q: What is the percent by mass of oxygen in aspirin (C₉H₈O₄)?

A: The molecular weight of aspirin (C9H8O4) is  (12×9+1×8+16×4)=180 gm/mol The oxygen present in…

Q: e molarity of t

A:

Q: What is the percent composition by weight of carbon in the following compound? C6H9O4 Enter your…

A: Here, in this  problem we need to find the weight percentage of carbon in the compound given.

Q: What quantity in moles of NaCl are in 65.0 grams of NaCl?

A: Given :- mass of NaCl = 65.0 g  To calculate :- number of moles of NaCl

Q: How many moles are in 3.2 x 1024 of CO2 molecules? (round answer to the correct number of sig figs)

A: Given : Number of molecules of CO2 = 3.2 X 1024 molecules.

Q: moles of aqueous magnesium ions and chloride ions a

A:

Q: Example:- Calculate the number of grams in one mole of CaSO4.7H2O (calculate gram molecular or…

A: The gram molecular weight gives the data about the number of atoms or molecules present in that…

Q: How many moles of NH3 can be produced from 18.0 mol of H2 and excess N2? Express your answer…

A: To determine moles of ammonia: The balanced reaction is given as

Q: from the previous question convert 1.02x1024 molecules of O, to moles of O, O 1.69 moles of O, 3.38…

A: Option A is correct.

Q: How to calculate moles of 65.85g Ca (OH) 2

A:

Q: The percent by mass of bromine in SiCl2Br2 is

A:

Q: How many moles are in 9 g of H2O?

A: Mole represent quantity of fundamental particle like proton neutron and electron.

Q: The percent by mass of silver in Ag,CO3 is %.

A: Molecular mass of Ag2CO3 = 2*atomic mass of Silver + atomic mass of Carbon + 3*atomic mass of Oxygen…

Q: Mass % of H in ammonium bicarbonate

A: Given  Name of Compound = Ammonium bicarbonate Mass % of H = ?

Q: What is the formula to calculate the molar mass of H3COH with the units g/mol?

A: Molar mass is numerically equal to the molecular weight since molecular weight is sum of all…

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.