C. The number of oxygen atoms in 7.35 g of barium nitrate. Ba(NO₂)

Q: 5. Analysis of 20.0 g of a compound containing only calcium and bromine indicates that 4.00 g of…

A: Given, The mass of a compound is 20.0 grams The mass of the calcium in the compound is 4.00 grams

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: If you were asked to determine the formula mass of aluminum sulfate, how many oxygen atoms would you…

A: Formula mass is the sum of the mass of all the elements in the empirical formula of the compound.

Q: An unknown compound is processed using elemental analysis and found to contain 117.4 g of platinum,…

A: We know that,  Number of mole = given mass/molar mass Atomic mass of platinum =195.084 g

Q: 3.11  mL of seawater contains about 1.31×10-14  moles of gold, how many atoms of gold are in that…

A:

Q: How many total atoms are in 78.6 g of iron (II) chlorate?

A:

Q: Calculate the mass of an H2 molecule in kg.

A: We know the molar mass of H2, but this includes 6.022x1023 molecules of H2. In the question, it is…

Q: 2. What is the mass in grams of 6.8x10 molecules of ammonium?

A: We have to predict the mass of ammonia.

Q: How many grams would 71,934,010,495 atoms of a substance weigh if it has a molar mass of 23.7889…

A: Number of atoms = 71,934,010,495 atoms  6.02×1023 atoms = 1 mol 71,934,010,495 atoms =…

Q: If a sample of Fe2S3 contains 1.25x10^15 iron atoms what is the mass in grams ?

A:

Q: If you react 5.2 grams of magnesium metals with 2.3 grams of copper (II) bromide, how many total…

A: Given : Mass of magnesium i.e Mg taken = 5.2 g And mass of copper (II) bromide i.e CuBr2 taken = 2.3…

Q: What is the number of nitrogen atoms in 5.360 g of ammonium sulfate?

A:

Q: How many moles of NH3 are there in 1.93 grams of NH3?

A: No. Of moles = gram weight / molar mass Molar mass of NH3 = 17

Q: Calculate the total number of oxygen ATOMS in 1.926 g of magnesium perchlorate.

A: The total number of atoms available in the molecules of any particular substance is referred to as…

Q: Consider a sample of aluminum nitrate that contains 1.72 × 10²⁴ atoms of nitrogen. Determine What…

A:

Q: A sample of ammonia Nh3 contains 1.2 X 1023 hydrogen atoms. How many NH3 molecules are in the…

A: Ammonia (NH3) is a molecule that exists as a gas at Standard temperature (298 K). It contains atoms…

Q: A certain compound X is composed of 70.53% carbon, 13.02% hydrogen, and the remainder is nitrogen.…

A: Given values: Percentage of carbon = 70.53 % Percentage of hydrogen = 13.02 % Percentage of nitrogen…

Q: When 8.60 g of calcium are heated in air, 10.60 g of calcium nitride are formed. What is the…

A: We are given that 8.6 g of calcium is heated to produce 10.6 g of calcium nitride, the reaction can…

Q: What is the mass, in grams, of 7.70×1020 molecules

A:

Q: If we want to make 2.5 moles of NH3, how many grams of nitrogen will we need?

A: The balanced chemical equation for the reaction that produces ammonia (NH3) from nitrogen (N2) and…

Q: How many grams of carbon dioxide contain 3.79 × 10 23 molecules carbon dioxide?

A: USING THE MOLE CONCEPT. Molar mass of co is 28g

Q: How many molecules are there in 345.2 grams of HCl?

A: 1 mole = 6.022×1023 (Avogadro's number) The mass of one mole of molecules of a substance is called…

Q: How many oxygen atoms are contained in a 5.525 g sample of calcium phosphate?

A: First of all, we will calculate the no. of moles of calcium phosphate in 5.525 g of sample and then…

Q: Find the mass of 8.68 x 1032 molecules of sodium carbonate.

A:

Q: Write the chemical formula, and then calculate the number of molecules in 1.00 g of lithium…

A:

Q: How many moles of potassium cyanide, KCN, are present in a sample containing 67.1 grams of the…

A: Given, Mass of potassium cyanide (KCN) = 67.1 g Moles of potassium cyanide (KCN) = ? Note:  Molar…

Q: How many atoms of hydrogen are present in 24.49 g of C3H7OH?

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

Q: How many cations are there in 50.0 g of sodium phosphate?

A: Given:Mass of compound = 50.0 g.Formula of sodium phosphate is Na3PO4.Molar mass of Na3PO4 = 164…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: osmium by mass. a) If you assume 100.0 g of the compound, what is the mass in grams of osmium that…

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

Q: There are 1.18x10^24 carbon atoms in how. Many grams of glucose?

A: 1 mole = 6.0224 x 1023Mass = Number of mole x Molar massMolecular Formula of glucose = C6H12O6

Q: How many atoms of oxygen are in 12.99 g in nickel (II) nitrate?

A:

Q: How many moles of arsenic are there in 6.50 g of arsenic?

A:

Q: How many atoms are present in 0.430 g of gold?

A: Given, mass of Gold = 0.430 g  Molar mass of Gold = 196.97 g/mol Number of Atoms = ?

Q: How many oxygen atoms are in 1.70 g of quartz?

A: The chemical formula of quartz is SiO2. The formula mass of SiO2 is 60.08 g. The number of moles (n)…

Q: How many molecules are there in 12.5 g of NaOH

A: Number of Mole- Ratio of given mass of substance to the molar mass of substance is called number of…

Q: What percentage of NH4NO3 is nitrogen?

A: Mass percent of element  is the mass of element present in 100g of the compound. Mass percent of…

Q: 238.2g of sodium fluoride are decomposed to form sodium and fluorine. How many moles of sodium are…

A: The reaction of decomposition of NaF is as follows: Molar mass of NaF = 41.988 g/mol. Molar mass of…

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.