How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34?

? 19

? 15

? 34

In a balanced chemical reaction, the total mass of the products always equals the Select one: a. proportional masses of the reactants. b. molar mass of the reactants. c. total mass of the reactants. d. atomic mass of the reactants.

In the process of electrolysis current can flow through a liquid because

What is the converse of the conditional statement? Ifx is even, then x + 1 is odd. If x is not even, then x + 1 is not odd. Ifx + 1 is odd, then x is even. Ifx + 1 is not odd, then x is not even Ifx is even, then x + 1 is not odd.

Which of the following is true about folded mountains? They are formed with a cone on top. They form at convergent boundaries. They don't result from moving geologic plates. They form when magma breaks through the surface.

Which of the folowing is true about radio waves? ☹They have short wavelenghts ☹They can penetrate dust clouds ☹They reveal hot gases ☹They have high energies

The sun is composed entirely of oxygen and helium True or False?

What is the oxidation number for Mn in Mn2O7? (provide sign and number)

If you have 9900 g of donuts, how many donuts do you have if each donut has a mass of 150 g?

Particles which revolve around nucleus are called

If you collect, organize and interpret you data properly, you will always be able to draw a logical conclusion