Determine the mass in grams of 6.26 × 1021 atoms of arsenjc. (The mass of one mole of arsenic is 74.92 g.)

How many moles of gold (Au) are in2.1 × 10−10 g of gold?

Arrange the quantities from largest to smallest in terms of mass: E 1.35 moles of Cu = 2.51 x 1024 molecules of B = 150 g of Ca = 2.5 moles of Ag

4. Salicylic acid is an organic compound composed of 61 % C, 7% H, and the rest is oxygen. If 0.218 moles of salicylic acid have a mass of 150.0 g, what are the empirical and molecular formulas for salicylic acid? (Avogadro's number 6.02 x 1023)

If a sample of iron(III) sulfide contains 5.00x10^15 iron atoms, what is the mass of the sample in grams?

Determine the mass in grams of 5.47 × 10²¹ atoms of barium. (The mass of one mole of barium is 137.33 g.)

A 3.000 g sample of a gaseous compound was found to contain 2.560 g of carbon and 0.440 g of hydrogen. A) What is the simplest formula of the compound (Write C first and then H)? You won't be able to make the numbers a subscript. For instance, for MgCl2 enter MgCl2. B) The molar mass of the compound was found to be 42.08 g/mol. What is the molecular formula of the compound? You won't be able to make the numbers a subscript. For instance, for MgCl2 enter MgCl2.

B. How many grams of Al2(SO4)3 would contain 1.236 × 1020 atoms of sulfur? Mass of Al2(SO4)3 = grams

What is the mass, in grams, of 7.82 x 1016 molecules of oxygen?

What quantity in moles of iron atoms do you have if you have 5.00 x 10^23 atoms of iron. (The mass of one mole of iron is 55.85g)