Please help me, will mark brainliest :) 1. If 0.890 g of potassium and 0.590 g of chromium react with 0.727 g of oxygen, what is the empirical formula of the compound?

2. The percentage composition of tin (IV) chloride is 45.9% Sn and 54.1% Cl by mass. What is the empirical formula of tin (IV) chloride? (Hint: Assume you have a 100.0 g sample, and 45.9 g are Sn, and 54.1 g are Cl)

3. The formula of a compound is 184. Analysis of the compound shows that there is 1.216 g of nitrogen and 2.772 g of oxygen in the compound. What is the molecular formula for this compound? (Hint: find the empirical formula first)

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat