Use the densities of iron and aluminum that you calculated in Experiment 3 to answer the questions. What is the mass of a sample of iron that has a volume of 7.1 mL? mass of iron: 4 Incorrect What is the volume of a sample of aluminum that has a mass of 34.305 g? volume of aluminum: 3 Incorrect g mL

A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28 g of carbon and 3.85 g of hydrogen. What is the percentage composition of the compound?? 1.90.6% Carbon and 4.7% Hydrogen  2.90.6% Carbon and 9.4% Hydrogen 3.9.4% Carbon and 90.6 Hydrogen  4.3.1% Carbon and 3.8% Hydrogen 5.13.3% Carbon and 10.8% Hydrogen??

A penny has a mass of 2.50 g and the Moon has a mass of 7.35 × 10²2 Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of pennies? Round your answer to 3 significant digits. How many moles of pennies have a mass equal to the mass of the Moon? Round your answer to 3 significant digits. kg. g x10 X 5

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Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. 93. mol L 33. L = mol 752.4 mol + 57.08 L=0- 7.808 cm x 3.025 cm = cm X

Gaseous methane  CH4  will react with gaseous oxygen  O2  to produce gaseous carbon dioxide  CO2  and gaseous water  H2O . Suppose 0.64 g of methane is mixed with 0.845 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to  3  significant digits.

The chemical formula for rubidium chloride is RbCl. A chemist measured the amount of rubidium chloride produced during an experiment. She finds that 633. g of rubidium chloride is produced. Calculate the number of moles of rubidium chloride produced. Be sure your answer has the correct number of significant digits. mol 30 MacBook Air DII 80 888 F7 F8 F4 FS F3

and gaseous Gaseous methane (CH4) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂) water (H₂O). Suppose 0.80 g of methane is mixed with 1.22 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 3 significant digits. g x10 X Ś

A chemist weighed out 4.3 g of silver. Calculate the number of moles of silver she weighed out. Be sure your answer has the correct number of significant digits. 11 mol 0 x10 X

This is not a grading question, so please help me with the answer. Thank you.