13. What is the molar mass of (NH4) 3PO4? (Use whole number molar masses) *

a. 113 g

b. 121 g

c. 149 g

d. 339 g

14. What is the mass of oxygen in 300 g of sulfuric acid (H2SO4) ? *

a. 64 g

b. 196 g

c. 210 g

d. 300 g

Which of the following requires the most input of energy? A. melting a substance B. raising the temperature of the substance by 1° C C. decreasing the temperature of the substance by 1° C D. vaporizing a substance

If the mass of a liquid reactant is 10g and the mass of a powder reactant is 5g then what should the mass of the product be according to the law of conservation mass

Asmall metal bar, whose initial temperature was 20°C, is dropped into a large container of boiling water.

What is the density of 10.2 mL of corn syrup that has a mass of 10.00 g?

Q#1.) According to newton second law of motion, if we have a rigid body of uncharged mass is observed acceleration, what must be happening? A. a force was once applied but is now not being applied. B. a force is being applied to the mass. C.

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect

Which of the followings represents a negatively charged ion

Why do you think plant fossils are less common than body fossils?

Why are valence electrons important?

A woman carriers her 100-newton child for a distance of 50 meters to the child's bedroom. How much work does the woman do?