1) Vanillin (used to flavor vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest amount. The threshold limit is 2.0 10-11 g per liter of air. If the current price of 50. g of vanillin is $112, determine the cost to supply enough vanillin so that the aroma could be detected in a large aircraft hangar with a volume of 3.0 107 ft3. (Enter your answers in units of dollars and two decimal places.)(adsbygoogle = window.adsbygoogle || []).push({});

2) The total volume of seawater is 1.5 1021 L. Assume that seawater contains 3.1 percent sodium chloride by mass and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. (1 ton = 2000 lb; 1 lb = 453.6 g)

3) Chalcopyrite, the principal ore of copper (Cu), contains 34.63% Cu by mass. How many grams of Cu can be obtained from 5.80 103 kg of the ore?

4) The density of sulfuric acid in a certain car battery is 1.41 g/mL. Calculate the mass of 165 mL of the liquid.

5) The volume of a room is 2.07 108 dm3. What is the volume in m3?

Ive done about 40 out of 50 so far and these are the ones I got stuck on.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Chemistry Math Help!

**Physics Forums | Science Articles, Homework Help, Discussion**