Calculate the angular distance that Mars traveled between 08/09/03 and 09/08/03, compare that to the angular distance that Mars traveled between 9/15/02 and 10/14/02. Which one of those distances is the largest? (Show both calculations.) When is Mars moving the fastest, when it is closest or furthest from the Sun?

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.

The ideal gas model is valid if which of the following conditions is true? the gas density is low. the gas density is high. the temperature is low. the temperature is high. the gas density and the temperature are low. the gas density and the temperature are high. the gas density is high and the temperature is low. the gas density is low and the temperature is high.

Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class