An unknown compound has the following chemical formula: Cr(OH), where x stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 9.5 mol of oxygen and 3.2 mol of chromium. Write the complete chemical formula for the unknown compound.

Starting with the following equation, BaCl₂(aq) + Na₃PO₄(aq) → Ba₃(PO₄)₂(s) + NaCl(aq) calculate the mass in grams of BaCl₂ that will be required to produce 41.5 grams of Ba₃(PO₄)₂.

a sample of solid silver oxide with a mass of 11.4 grams was reduced to elemental silver by heating under a flow of methane gas CH4- the reaction produced 10.6 grams of silver. what is the empirical formula of silver oxide?

4.33 g sample of a compound consisting of carbon, hydrogen, oxygen, nitrogen, and sulfur was combusted in excess oxygen. This produced 6.38 g CO2 and 2.88 g H2O. A second sample of this compound with a mass of 5.05 g produced 2.70 g SO3. The third sample of this compound with a mass of 6.95 g produced 2.94 g of HNO3. What is the empirical formula of the compound?

You are working in a space station laboratory that is orbiting the star system Geddy Prime. Your lab is analyzing the materials found on a planet close to the main red dwarf star. You find a compound made entirely of C, H, and O. When 23.21 g of this compound are burned, you recover 35.21 g of CO2, and 7.21 g of H2 What is the empirical formula of this compound?

An unknown compound has the following chemical formula: NxO3 where  x  stands for a whole number.   Measurements also show that a certain sample of the unknown compound contains  5.3mol  of nitrogen and  8.1mol  of oxygen.

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?

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?

When 6.961 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 21.84 grams of CO₂ and 8.943 grams of H₂O were produced. In a separate experiment, the molar mass of the compound was found to be 28.05 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon. Enter the elements in the order presented in the question. empirical formula = molecular formula = =

For the reaction represented by the equation C12+ 2KBr      2KC1+Br2, how many grams of potassium chloride (KC1) are produced from 3.75 x 1023 molecules of chlorine gas (C12)?