Which best describes why scientific models change over time? (2 points) models can be changed by scientists who are more famous than previous scientists. as technology advances, new experiments often expose problems in accepted theories. scientists tend to value new theories because they are more exciting. a newer theory is more valid because it uses more mathematics.

Brad and his family like to go camping. they always take a gas lantern with them. the lantern can take fiuels but always puts out the same amount of light. brad has two different kinds of fuel for the lantern. how can he figure out which kind of fuel has more chemical energy that the lantern can turn into light? measure the brightness of the lantern using each kind of fuel by comparing it to the full moon. g measure the volume of the containers of fuel. measure how long the lantern stays lit on a fixed amount of fuel. measure the mass of each container of fuel using a balance scale. answer 12

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?