Complete each of the sentences.

pH meters measure pH

pH meters

a source of electricity.

pH meters

calibration

How would you prepare 3.40 Ã 102 ml of a 0.736 m naoh solution, starting with a 6.79 m stock solution?

Which is the correct formula for the compound made when aqueous solutions containing a dissolved magnesium compound and a dissolved chloride compound are mixed?

You are trying to determine the volume of the balloon needed to match the density of the air in the lab. You know that if you can get the balloon's density below this value, it will float.

Which must be true when work is done on an object resting object and the object moves?

Which statement is true about an empirical formula? -It is the true ratio of atoms in a formula unit. -It is the simplest ratio of atoms in a formula unit. -It represents the true molecular mass of a chemical formula.

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

A base can neutralize an acid. true or false

Hydrochloric acid (12.0 ml of 0.233 m) is added to 296.0 ml of 0.0579 m ba (oh) 2 solution. what is the concentration of the excess h + or oh - ions left in this solution?