4. Many common dry-chemical fi re extinguishers contain ammonium phosphate, (NH4)3PO4(s), as their principal ingredient. If a sample of ammonium phosphate contains 4.5 x 1021 atoms of nitrogen, what is the mass of the sample?

Q: 4. What is the mass of 2.5 moles of Nickel (Ni) atoms?

A:

Q: A sample of monochloro pentaborane (9), B5H8Cl, has a mass of 20.7 g. What amount, in moles, does…

A: Chemical formula of monochloro pentaborane = B5H8Cl.Above compound contains B, H and Cl atom.

Q: Calculate the mass, in grams, of each of the following: a. 2.4 mol of aluminum Mass %3D b. 1.60 x 10…

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

Q: The mass of a silver (Ag) coin is 15 g. If the coin is 50% Ag by mass, then how many Ag atoms are…

A: The given mass of the silver coin = 15 g Percentage composition by mass of silver (Ag) = 50% So,…

Q: Calculate the mass of 1.00 x 1024 (a septillion) molecules of water.

A: Given : Number of water molecules = 1.00 X 1024

Q: 4.104. When 2.750 g of the oxide Pbạ O4 is heated to a high temperature, it decomposes to produce…

A: Pb3O4     ------>     O2   +  PbxOy Mass of Pb3O4 = 2.750 g  Molar mass of Pb3O4 =  685.6 g/mol…

Q: A sugar crystal contains approximately 1.8 * 1017 sucrose (C12H22O11) molecules. What is its mass in…

A: First determine the molar mass of given compound. The molar mass of sucrose is 342.29 g/mol.

Q: The semi-precious stone turquoise is a hydrate and with the chemical formula CuAl₆(PO₄)₄(OH)₈･4 H₂O.…

A:

Q: The fuel used in many disposable lighters is liquid butane, C4H10. How many carbon atoms are in 1.50…

A: The value is given as follows:

Q: How many atoms in total are there in one molecule of Mg(NO3)2?

A: In a molecular formula, symbols of all the constituting atoms are shown along with their numbers in…

Q: What is the mass, in grams, of each of the following samples? a.) 2.75 mol of iron, Fe  b.) 0.115…

A: Mole of solid sample is calculated by below formula,

Q: A drop of water, H2O, has a volume of approximately 0.050 mL. Assuming that the density of water is…

A: Given volume of 1 drop = 0.05 ml density of 1 drop = 1 g/ml number of drops = 3

Q: Question attached

A: Number of moles of the substance is equal to the ratio of mass to the molar mass of the substance.…

Q: 2. The volume of the nucleus of a carbon atom is about 9.9 x 10-39 mL. The molar mass of carbon is…

A: Given: Volume of carbon nucleus atom = 9.9 × 10-39 mL. And molar mass of a carbon atom = 12.00…

Q: What mass of oxygen is 63.8 g of magnesium nitrate: Mg(NO3)2 (Mw. 148.33 g/mol)?

A: Molar mass of Mg(NO3)2 = 148.33 g/mol Atomic mass of O =16.0 g/mol Mass of Mg(NO3)2 = 63.8 g (Given)…

Q: A 3.17 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 4.34 x 1022…

A:

Q: 2. A 13.07g sample of an unknown compound is composed of 9.48 g of barium, 1.66g of carbon and 1.93…

A: Empirical formula of a compound is denoted by the proportion of numbers of atoms present in the…

Q: 4. A chemist has a sample of propanol, C3H;OH, that contains 9.2 x 1024 molecules. What is the mass…

A:

Q: 42. Ethanol (C2H50H), a domestically produced fuel source, is often blended with gasoline. A sample…

A: Given mass of Ethanol (C2H5OH) = 45.6g To determine the number of carbon,hydrogen and oxygen atoms…

Q: 5A. Sorbitol, used as a sweetener in some sugar-free foods, has a molecular mass of 182 u and a mass…

A:

Q: 9. How many grams are in 3.01 x 1023 atoms of carbon?

A:

Q: 1. How many moles of Pb is 9.34 x 1015 atoms of Pb?

A:

Q: If a sample of ethanol has a mass of 1.34 x 104 mg, d) How many C atoms are in the sample? e) How…

A: Stoichiometry involves the calculation of concentration of solutions in the given conditions of…

Q: White phosphorus consists of a molecule made up of four phosphorus atoms. It burns in pure oxygen to…

A: The given balanced chemical equation                                               P4…

Q: A 2.62 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 3.59 x 1022…

A: Given  (a)   Mass = 2.62 gram       Number of molecule of N2O  =  3.59 × 1022 molecule       Number…

Q: 1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms? 2) How

A: We know, 1 mols = 6.022x1023 atoms

Q: In 6.9 g of aluminum, there are ______ x 1023 aluminum atoms present

A: Molecular mass of atom contains 6.023 × 10^23 atoms. Molar mass of aluminium is 26.981 g/mol

Q: how many atoms of carbon are in a 12.5 mg sample of C^3H^8?

A: Given, Mass of C3H8 = 12.5 mg = 0.0125 g Formula used,  moles=given massMolar mass 1 mol = 6.023 x…

Q: 1.92 g M2+ ion reacts with 0.158 mol X- ion to produce a compound, MX2, which is 86.8 % X by mass.…

A:

Q: A sample of phosphorus weighs 3.8 x 103 ng.  How many phosphorus atoms are present in this sampme?…

A:

Q: A 3.48 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 4.76 x 1022…

A:

Q: O 1.98 x 1022 atoms of lead

A:

Q: How many moles of iron are present in 3.15 x 10 24 atoms of iron?

A: Number of atoms of iron = 3.15 × 1024 atoms.  Number of moles of iron = ?

Q: 9. If you have 9.407 x 1023 atoms of lead, how many grams of lead (IV) phosphate can you make? 10.…

A:

Q: %3D The mass of 2.21 x 1040 atoms of iron (molar mass = 55.845 g/mol) is O 2.78 x 104 g. 2.05 x 102g…

A:

Q: A 67.2-g sample of a gold and palladium alloy contains 2.49x10^23 atoms. What is the composition (by…

A:

Q: The reaction between methanol and oxygen gas produces water vapor and carbon dioxide. 2 CH,OH(1) + 3…

A: From the reaction it is clear that 2 moles methanol and 3 moles oxygen reacts to give 4 moles water…

Q: 1) _Fe + 6.882 g of iron yields how many grams of hydrogen? H;SO, >_Fe(SO4)3 +

A:

Q: How many moles of C,H, contain 4.96 x 10 24 hydrogen atoms?

A: The number of moles of C3H8 required can be calculated by using the unitary method. C3H8 (propane)…

Q: 1. How many moles would contain 12.0 g of P ? 2. Find the mass (in grams) 7.7 X 1023 molecules of…

A: 1. Given values , Mass of P= 12.0 g Molar mass P= 30.973762 g/mol

Q: 2.845 x 1012 potassium ions equals how many moles of potassium ions?

A: 1 mol of potassium ions equal 6.022 ×1023ions    16.022×1023moles of potassium ions equal 1 ion

Q: A compound is 19.3% Na, 26.9% S, and 53.8% O. Its formula mass is 238 g/mol. What is the molecular…

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

Q: Dic orodifluoromethane (CF2C12) is an Ozone-depleting substance. It belongs to a class of compounds…

A: Given that, 10.0 g of CF2Cl2. Also, the atomic weights are  C = 12.01, F = 19.0, Cl = 35.45. The…

Q: If the mass of a pure silver (Ag) coin is 15 g, then how many Ag atoms are present in this coin?

A:

Q: The average mass of one atom of carbon is 2.00 x 10 –23 g. How many carbon atoms are present in a…

A: Given:Mass of one atom of carbon = 2.00 x 10 –23 g.Total mass of sample of carbon = 40.0 g.

Q: A metal (M) forms a compound with the formula MCl3. If the compound contains 65.57 % Cl by mass,…

A: Assume 100 g of the compound is present. This turns percent into mass.Given 65.67 % of chlorine by…

Q: 9. Explain how the atomic mass unit (amu) is defined and explain how the definition of an amu, in…

A: amu i.e atomic mass unit is the unit used to express mass .  Avogadro's number = 6.0221 × 1023

Q: A 3.69 g sample of nitrous oxide (an anesthetic sometimes called laughing gas) contains 5.05 x 1022…

A: a.The total number of nitrogen atoms in 3.69g sample of nitrous oxide is calculated as,

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".