In a chemical reaction, 31.1 moles of H2 gas are produced. How many moles of H3PO4 reacted?
2 Cr(s) + 2 H3PO4(aq) + 3 H2(g) + 2 CrPO4(s)
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Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled