Caffeine has the formula C8H10N4O2. If an average cup of coffee contains approximately 125 mg of caffeine, how many moles of caffeine are in one cup?

Calculate the mass, in grams, for each of the following:e. 2.08 moles of (NH₄)₂SO₄

Calculate the mass, in grams, for each of the following:d. 0.145 mole of C₂H₆O

How many NA+ ions are in a mole of Na2SO4? How many SO4 2- ions?

How many moles of ions are in 1.75 mol of K2SO4?

Find the mass in atomic mass units of the following:a. 1 O atom, with a mass of 2.66 * 10^-23 gb. 1 Br atom, with a mass of 1.31 * 10^-22 g

The principal component of many kidney stones is calcium oxalate, CaC2O4. A kidney stone recovered from a typical patient contains 8.5 x 10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone? What is the mass of the kidney stone in grams?

How many O atoms of mass 15.99 amu are in 15.99 g of oxygen?

Calcium citrate, Ca(C6H5O7)2(MW = 498.5 amu), is a common dietary supplement to provide calcium needed for strong teeth and bones.What mass of calcium citrate would be needed to provide the recommended daily intake of calcium?