HEL A mixture of helium (He) and methane (CH4) is placed in an effusion apparatus. V1/V2 = (radical symbol)m2/(radical symbol)m1

1. What is the molar mass of He? (round to the nearest hundredths)

2. What is the molar mass of CH4 (round to the nearest hundredths)

3. What is the ratio of the effusion rate of the helium to methane (Round to hundredths)

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

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

What are transitions between a liquid and gas called? identify which way they are transitioning