How many molecules of sulfuric acid are in 5.00 g of sulfuric acid? Write your answer with the correct significant figures in the blank (do not write the units)

A sample of vinegar (20.0000 g) contains 1.0763 g of acetic acid. What it the mass% of acetic acid in the vinegar? Write your answer in standard notation with the correct number of significant figures. You do not need to include units.

A major component of gasoline is octane (C8H18). When liquid octane is burned in air it reacts with oxygen (O2) gas to produce carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.70mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits.

please put the right number of significant figures

Gaseous ethane (CH,CH,) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (CO,) and gaseous water (H,O). suppose 2.4 g of ethane is mixed with 16.8 g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Round your answer to 2 significant digits.

A major component of gasoline is octane  C8H18 . When liquid octane is burned in air it reacts with oxygen  O2  gas to produce carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce  0.600mol  of carbon dioxide. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

A major component of gasoline is octane (C,H,3). When liquid octane is burned in air it reacts with oxygen (O gas to produce carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 0.500 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. Ox10 Dlo 4

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Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose (C6H1206) and oxygen (0₂) gas. Calculate the moles of carbon dioxide needed to produce 1.20 mol of oxygen. Be sure your answer has a unit symbol, if necessary, and round it to 3 significant digits. I X x10 ロ･ロ

Calculate the number of hydrogen atoms in a 120.0 g sample of camphor (C10H160). Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. 0 X