1) y = x2 + 6x + 5

2) y=-21

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What role do catalysts play in chemical reactions?

Consider a perfect gas that occupies 2.5 dm3 at a pressure of 3.00 bar. The gas is compressed at a constant pressure pex, so that the final volume is 0.5 dm3.

A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved in water. the student combines 5.00 grams of lithium chloride with 100.0 ml of distilled water. the initial temperature of the water is 23.

In a solution composed of benzene and toluene that has a vapor pressure of 32 torr at 20°C, what is the mole fraction of benzene?

What is the only sure evidence for a chemical reaction?

Chemistry Honors: Calculations Involving a Limiting Reactant For each of the following unbalanced chemical equations, suppose that exactly 5.00 g of each reactant is taken.

How to ditermin somthings volume?

Thomas has 235 grams of K2S in the chemistry lab. How many atoms of potassium (K) are in 235 grams of the compound?

True or False: Gases have a definite shape and volume. True False 2. What happens to the kinetic energy of particles when a substance changes from a liquid to a solid? Decreases Stays the same Increases

Some skin creams claim that they are "pH balanced" yet do not have a pH of 7. what do the manufacturers mean by "pH balanced"