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A student attempting to determine the density of an unknown liquid collects the following data Mass  (g)                  Volume  (mL) 8.709                       12.0 12.352                     17.0 16.345                     22.5 Calculate the average density

Sodium chlorate is used as an oxidizer in the manufacture of dyes, explosives, and matches. Calculate the mass of solute needed to prepare 1.575 L of 0.00250 M NaClO3 ( = 106.45 g/mol).

A 16.0 gram sample of propane gas (C3H8) is burned according to the equation C3H8(g) + 5O2(g) –> 3CO2(g) + 4H2O(g) In an enclosed container with a volume of 2.25 L at a temperature of 322 K. Calculate the partial pressures of H2O in the container after the reaction.

Determine the molar mass of NaC2H3O2 Report your answer with 4 significant figures

A 16.0 gram sample of propane gas (C3H8) is burned according to the equation C3H8(g) + 5O2(g) –> 3CO2(g) + 4H2O(g) In an enclosed container with a volume of 2.25 L at a temperature of 322 K. a. If the sample of propane burns completely and no oxygen remains in the container, calculate the mole fractions of CO2 expressed as a decimal with 3 significant figures.

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its pressure, other factors remaining constant? a

Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain. Calculate the mass in grams of 3.65 × 1020 molecules of SO3.

This data set can be judged to be accurate because the percent uncertainty is relatively small.