What is the amount, in moles, of each of the following substances? A)12.6 g Ar B)3.50 g Zn C)26.5 g Ta D)0.210 g Li

Consider a sample of carbon tetrafluoride that contains 1.59 × 1024 atoms of fluorine. Using the formula CF4, What quantity in moles of fluorine are present?

What is the mass of 1.000 × 1024 Aluminum atoms in grams

A 56.4 g sample of a compound with a molecular mass of210 u was found to be composed of 12.35 g of sodium 25.77 g of carbon, 1.07 g of hydrogen, and an unknown mass of oxygen. What is the molecular formula for this compound?  A chemist analyzed an unknown compound and determined that it was composed of 2.2 percent hydrogen, 26.7 percent carbon, and 71.1 percent oxygen. What is the empirical formula for this compound?  Acetone is a liquid solvent that works well as a nail polish remover. Acetone contains 62.0 percent carbon, lOA percent hydrogen, and 27.5 percent oxygen.  The molecular mass of acetone is 58.1 u. What is the molecular formula for acetone?

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.

4.25 x 1024 atoms N converted to grams

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)

A scientist is trying to discover information about an unknown metal in a compound. The formula for the compound is believed to be XBr, where X is the unknown metal. The scientist determined that a 4.723 g sample of this compound contains 5.313 x 10-2 mol Br. Calculate the atomic mass of the unknown metal, X. atomic mass= What is the identity of the metal? Provide the name or symbol of the element. metal: MacBook Pro amu

The molar mass is the mass of 6.022 x 1023 particles of matter. O True False