Select the correct answer.

Which reaction is a decomposition reaction?

A.

2KClO3 → 2KCl + 3O2

B.

4Na + O2 → 2Na2O

C.

ZnS + 3O2 → 2ZnO + 2SO2

D.

2NaBr + CaF2 → 2NaF + CaBr2

Calculate the molarity of the solution that results when 45.0 g of KOH is dissolved in enough water to make 250.0 ml of solution? a. 2.24 mol/L b. 0.312 mol/L c. 3.21 mol/L d. 0.180 mol/L e. 45.0 mol/L

How many elements are in a set whole numbers between 3 and 15

If 3.80 m of gas initially at stp is placed under a pressure of 3.20 atm, the temperature of the gas rises to

Can elements be broken down into simpler substances?

Which of the following types of organelle is most important in providing a cell with energy? A. mitochondria B. nuclei C. vacuoles D. cell membranes

Why are elements organized in the same group or families

Iron Man died in Infinity Wars, so Mrs. Nogaki has decided that she is going to make her own super hero suit to save the world. She has decided that her suit must have these properties.

How many atoms of oxygen are there in one molecule of carbon dioxide, if the chemical formula is CO2? 0 1 2 3

The speed of a chemical reaction a. is constant no matter what the temperature is. b. is independent of the amount of contact surface of a solid involved. c.

Find the de Broglie wavelength (in nm) associated with an electron that is moving with a velocity of 5230 km/s. The electron rest mass is 9.11 x 10⁻³¹ kg.