4 HF (g) + SiO 2 (s) → SiF 4 (g) + 2 H2 O (l)

What mass of water (in grams) is produced by the reaction of 67.0 g of SiO2?

Which one of the following is a pure substance? 1. milk2. Concrete3. Wood 4. Salt water5. Elemental copper

The solubility product constant of calcium hydroxide is 6.5x10-6. if 0.30 mol of sodium hydroxide is added to 2 l of 0.0010m ca (oh) 2, what is the final concentration of the calcium ion? show your work.

A chemist has dissolved a certain substance in water the chemist knows that more of the substance could be dissolved into the water before it stops dissolving there for the current solution is a.) unsaturated b.) saturated c.) supersaturated

How high is the empire state building

9. At STP, how many liters of any gas are occupied by one mole?

25 In general, for a gas at a constant pressure, A the temperature of the gas is inversely proportional to its volume B. the temperature of the gas is inversely proportional to its pressure C.

The vapor pressure of ethanol is 54.68 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in ethanol is saccharin. Calculate the vapor pressure of the solution at 25 °C when 8.054 grams of saccharin, C7H5NO3S (183.

What do microscopic producers supply the atmosphere with?

A particular form of electromagnetic radiation has a frequency of 8.11 x 10^14 hz. What is the energy in joules of one quantum of this radiation?

Which transition elements in the first transition series have anomalous electron configurations?