1- Determine the mass of 6.46 mol of Pb, H₂SO4? 2- Determine the moles in 125.0 grams of nickel, 567.0 grams of calcium carbonate? 3-What is the mass of one atom of gold?

A chemical reaction calls for 0.125 moles of sodium acetate, NaC2H3O2. What mass, in grams, of sodium acetate would you need to prepare?

How many moles of Al are necessary to form 48.8 g of AlBr₃ from this reaction: 2 Al(s) + 3 Br₂(l) → 2 AlBr₃(s) ?

What mass in grams are in 5.32x10^22 molecules of CO2? For some reason, I'm getting confused on how to set up the conversion.

A 0.3459 g tablet that contains bicarbonate generates 1.24 x 10−3 moles of CO2. What is the percent bicarbonate in the tablet?

Copper(II) sulfate forms several hydrates with the general formula CuSO4·xH2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure CuSO4 behind. Suppose a sample of a certain hydrate is heated until all the water is removed, and it's found that the mass of the sample decreases by 31.%. Which hydrate is it? That is, what is x?

Imagine that you perform a combination reaction between 60.0 g of sodium metal (Na) with 10.0 g of nitrogen gas (N2).  Write the balanced chemical equation

Consider the copper thermite reaction, a reaction between two solids that can be initiated with strong heating: 3 CuO(s) + 2 Al(s) → 3 Cu(s) + Al2O3(s) 25.0 g of copper(II) oxide are combined with 25.0 g of Al , and the mixture is heated strongly to react. molar masses (g/mol):  CuO - 79.55    Al - 26.98    Cu - 63.55 What is the chemical formula or elemental symbol for the limiting reactant?   What is the chemical formula or elemental symbol for the excess reactant?

How many moles of Al are necessary to form 71.2 g of AIBR, from this reaction: 3 2 Al(s) + 3 Br,(1) → 2 AIB.,(s) ?

True or False? One mole of molecular O2 = 6.02 x 1023 O2 molecules. Mass of O2 in 100g of CO2 = (32.0g ÷0g) x 100 = 72.7 O2