Students working in lab use 52.3g of CaCl2 to make a solution. When the solution is brought to a final volume of 800. mL, what is the concentration?

A. 0.139 M

B. 0.153 M

C. 0.588 M

D. 0.632 M

Calculate the [OH-] if the pOH = 2.55. a 2.55 M b 11.45 M c 3.55 x 10-12 M d 2.82 x 10-3 M

Indicate which of the following criteria are important for the selection of a buffer to use in an in vitro biochemical reaction. (Select all that apply.) a. The molecular weight of the chosen buffer should be in the range of 150 g/mol to 650 g/mol.

How the water cycle functions because of change in matter.

In a game of tug-of-war, you pull on the rope with a force of 100 N to the right and your friend pulls on the rope with a force of 100 N to the left. What is the net force on the rope?

What is the charge of the nucleus of every atom?

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, nh4br, and aqueous lead (ii) acetate, pb (c2h3o2) 2.

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with

Classifying living things