What causes pressure inside a helium balloon? A. The helium atoms stick to the surface of the balloon and increase
its weight
B. The helium atoms expand and press on the surface of the balloon.
C. The helium atoms bounce off the surface as they move inside the
balloon.
O D. The helium atoms exert an electrostatic force that pushes the
surface outward.

Apackage contains 1.33 lb of ground round. if there’s 29% fat, how many grams of fat are in the round? i got 175 g but the textbook says the answer is 91 g of fat. how?

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).