A compound contains 44.06 % chromium (Cr), 15.27% carbon, and 40.67% oxygen. Determine the empirical formula.

A 21.57 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 21.09 grams of CO0, and 4.317 grams of H20 are produced. In a separate experiment, the molar mass is found to be 90.04 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

A sample of a white solid contains 0.212 g of magnesium and 0.140 g oxygen. What is the empirical formula of this compound?   Mg2O2   MgO2   Mg2O   MgO

Vitamin c is known chemically by the name ascorbic acid. Determine the empirical formula of ascorbic acid if it is composed of 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen.

Combustion analysis of naphthalene, a hydrocarbon used in mothballs, produced 8.80 g CO2 and 1.44 g H2O. Calculate the empirical formula for naphthalene.

What is the empirical formula of a compound containing 37.51% carbon, 4.20% hydrogen, and 58.29% oxygen?

A compound is found to be 43.64% P and 56.36% O by mass. Determine its empirical formula.

1:  Find the empirical formula for a compound that is 34.59% NA, 23.31% P, and 42.10% O by mass?  2: find the empirical formula for a sample of which contains 0.388 g LI, 2.992g Cr, and 3.147g O?