How many individual molecules of Mg(OH)2 are in 5.8 g of Mg(OH)2?

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) ?

Avogadro's number is the number of particles in one mole, 6.022 x1023 particles = 1 mol.  How many molecules of water are present in a 4.5 mol sample of sodium chloride?

Convert 7.33 moles Ca(OH)2 to grams of Ca(OH)2

Disulfur dichloride, which has a revolting smell, can be prepared by directly combining Se and Cl₂, but it can also be made by this reaction: 3 SC1₂ (1) + 4 NaF (s) → SF4 (g) + S₂ Cl₂ (l) + 4 NaCl(s) Calculate the mass of SC12 needed to react with excess NaF to prepare 1.37 g S₂ Cl2 if the expected yield is 46%. Mass of SC12 = g

An individual has 7.5 × 10−3 mol of hemoglobin (molar mass = 64,456 g/mol) in their blood. How many hemoglobin molecules is this?

An impure sample of table salt (NaCl) that was dissolved in water and treated with silver nitrate to form silver chloride. If the initial sample had a mass of 1.741 g and the final mass of the AgCl was found to be 4.084 g, what is the mass percent of NaCl in the impure sample?

For the chemical reaction   2KI+Pb(NO3)2⟶PbI2+2KNO3 what mass of lead(II) iodide is produced from 2.61 mol of potassium iodide?

What is the mass in grams of 3.63 × 10-3 mol (NH4)2HPO4?

c If you begin with 3.7 mg of Tc metal, what mass of NaTcO4 can be made? What mass of NaOH, in grams, is required to convert all of the HTCO4 into NaTcO4? Mass of NaTcO4 = Mass of NaOH =