The number of protons in an atom of an element always equals its atomic weight.

a. True

b. False

If this energy were used to vaporize water at 100.0 ∘C, how much water (in liters) could be vaporized? (Assume the density of water is 1.00 g/mL.)

At constant volume, you cool a sealed, air-filled can, and the pressure reduces by half. What happens in this situation? The number of collisions per unit area doubles. The spaces between the gas molecules shrink.

The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of C3H8 is 44.1 g/mol. What mass of O2, in grams, is required to completely react with 0.025 g C3H8? 0.018 0.034 0.045 0.091

Which of the following is a solution? a) sand b) salt water c) orange juice d) granola

Wut is the meaning of pain?

35mL of acid with an unknown concentration is titrated to completion using 63mL of 3.0 MNaOH. What is the concentration of the acid?

What is the number of lone electron pairs on the central atom of a molecule having a linear molecular geometry, such as clf2-?

Look carefully at Kw expression. If the [H+] changed from [1 x 10-7] to [1 x 10-4], the [OH-] will: A. remain the same B. increase C. decrease

What on a bird, besides it's feet, is chemically similar to scales? A. beak B. feathers C. wings

What are the carbon (C) and oxygen (O) in carbon dioxide (CO2) ? (select all that apply) A) Atoms B) Compounds C) Elements D) Molecules