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General Chemistry

Solve: Volume and Torr Pressure

If a gas occupies 625 mL at 0 Celsius and 760 torr pressure, what will its volume be at 373 degree C and 1520 torr pressure?

Significant Digits and Unit Conversion

1) How many significant figures are there in the answer to the following problem? (8.881*.02100) + .590? 2) A parsec is 206,265 times the distance from earth to the sun. If the distance is 8.000 million miles, express the distance of a parsec in miles in scientific notation.

Writing and Balancing Chemical Equations

I need the following chemical equations written and balanced: Potassium metal is heated with powdered phosphorus to produce potassium phosphide. Cobalt (III) hydrogen carbonate decomposes by heating to give solid cobalt (III) carbonate, water, and carbon dioxide gas. Aqueous solutions of tin (II) chloride and sodium sul