An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

20

The answer is 25

Which terms most precisely describes the cellular process of breaking down large molecules into smaller ones?

The value for Kw is 1.0 x 10-14 at 298K, but this value is temperature dependent. Given what you know about Kw and acid/base chemistry, what will the pH of water be at 303K if the value for Kw is 1.

The number of d-electrons in Fe2 + (Z = 26) is not equal to that of A. p-electrons in Ne (Z = 10) B. s-electrons in Mg (Z = 12) C. d-electrons in Fe (Z = 26) D. p-electrons in CI (Z = 17)

To prepare 300.0 ml of 0.2 m nacl how many grams of nacl should be weighed out?

Theistic religion is centered in a belief in Select one: a. spirits or animals that control our lives. b. such totems as a rabbit's foot or four-leaf clover. c.

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?

The combustion of propane may be described by the chemical equation C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) How many grams of O2 (g) O2 (g) are needed to completely burn 83.3 g C3H8 (g) ?

Was the relationship among temperature, heat, and thermal energy?