It took Jackie two hours to mow the lawn. Two weeks later it took her one and one-half hours to mow the lawn. What can be said about the amount of power used by Jackie the second time she mowed the lawn?

Calculate the hydronium ion concentration of a solution containing 0.200 mole of acetic acid in 1.00 liter of solution. What is the percent ionization of this acid solution?

What number of moles of solute are present in 25.0 mL of 2.00 M HCl?

If you mix chlorine lithium and nickel together which two elements would be the most reactive?

Match each term with its definition. The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system. A molecule that donates a proton when it encounters a proton acceptor.

A helium balloon initially at room temperature is dunked into a bucket of liquid nitrogen (T = 77 K). Which of the following will occur?

Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine B. FeO = iron (|||) oxide C. K↓2O = Phosphorus dioxide D. CuCI↓2 = copper (||) chloride

Suppose you find a rock that contains some potassium-40 (half-life of 1.3 billion years). you measure the amount and determine that there are 5 grams of potassium-40 in the rock.

What are some positive and negative effects of the production of maple syrup on society and the environment?

Describe and give an example of parasitism.

Why is a dilute solution of oleic acid used instead of pure oleic acid?