Which is a factor that affects the size of mineral crystals formed in magma?

a. rate of cooling

b. fluorescence

c. evaporation

d. elements dissolved in hot water

Which statement about an element's average atomic mass is correct? a. It is determined by counting the number of isotopes in a sample of the element. b. It is equal to one-twelfth the mass of the most common isotope. c.

What would happen if you didn't have chemical energy on the earth

1. Why does putting baking soda on a fire put it out? A. The baking soda cools the fire off so it can't burn. B. CO2 gas is produced reducing the amount of heat. C. The fuel is covered and not available to the fire. D.

When potassium bromate (kbro3) is heated, it decomposes into potassium bromide and a gas that supports the combustion of a glowing splint?

Muscles work with what kind of action

Which usually has a higher temperature? A city or the areas around the city?

Toluene and pyridine form ideal solutions. Consider a solution of toluene and pyridine prepared at 25°C. Assuming that the mole fractions of toluene and pyridine in the vapor phase are equal, calculate the composition of the solution.

Formula for water what does the lack of a subscript after those O indicate

Why do the chemical properties cycle through each period? Every eighth element starting with hydrogen restarts the transition from metal to inert gas. Elements with atomic numbers which are multiples of eight start a new period.

Which statement correctly describes the Ka of a weak acid? The Ka is large, and the equilibrium favors products. The Ka is large, and the equilibrium favors reactants. The Ka is small, and the equilibrium favors products.