a student in chm 11500 lab measured the mass of a 250-ml erlenmeyer flask and recorded it as 79.83 g. she added 10.00 ml of deionized water from a 25-ml buret to the flask. the mass of the flask plus the water was 89.82 g. the temperature of the water was 22 °c. what is the calculated volume of the water that the student measured?

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

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

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.