Which of the following is not a common use of gypsum? a. wallboard/drywall for homes b. a primary ingredient for toothpaste c. surgical splints and casts d. pH reducing agent for acidic soils

What would you be most likely to measure be immersing an object in water and seeing how much the water level rises?

In the reaction of nitrogen gas n2 with hydrogen gas h2 to form ammonia gas nh3, how many moles of hydrogen are needed to react with 1.22 mol of nitrogen

A) the ka for acetic acid (h3cco2h) is 1.737 * 10-5. what is the pka for this acid? b. use the pka calculated above to determine the ph at which [h3cco2h]=[h3cco2-].

The amount of carbon on the Earth, including the atmosphere, a. is essentially constant b. is decreasing due to consumption of carbon based fuels, such s coal and petroleum c. is increasing due to plant and animal growth on the planet d.

1. In what year did the modern version of the metric system get accepted for use

1) Explain why oxygen is a fairly reactive element while neon is not. 2) Explain why beryllium loses electrons when forming ionic bonds, while sulfur gains electrons. 3) Explain why fluorine and chlorine have similar reactivities (Hint.

You add heat to matter, the atoms that make up the matter will begin to move?

What is the h2 h2o molar ratio?

Which of earth's systems was most affected by fossilized dinosaurs? A. Biosphere B. Hydrosphere C. Lithosphere D. Atmosphere

What factors are used to determine whether a bond will be polar or nonpolar? And what factors are used to determine whether a molecule will be polar or nonpolar?