The atomic mass of an element whose atoms consist of eight protons, nine neutrons, and eight electrons is

8

16

17

25

Which term refers to the speed at which reactants are converted into products? A) reaction rate B) activation energy C) meta stable state D) spontaneous reaction

The rock cycle the rock label b is

Which compositional layer of earth is the thinnest? A. The crust B. The mantle C. The inner core D. The outer core

What is the mass in grams of 1 liter of nitrogen gas?

When do enzymes allow chemical reactions to occur?

A solid substance turns into a liquid. Which best describes this change?

List two things you know about nonrenewable energy

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.