During a lab, we take the initial volume of water in a graduated cylinder to be 23.4 ml. After adding a screw to the water, it then raises to 27.6 ml. If the mass of the screw was found to be 7.1 grams- what would the density of the screw to be in g/ml? A) 3.89
B) 29.8
C) 3.40
D) 1.7

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

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2