What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass = 64.23 amu (26.0%), and one with mass = 65.32 amu?

(a) 65.3 amu

(b) 64.4 amu

(c) 64.9 amu

(d) 65.0 amu

(e) 64.8 amu

If unknown to you, your pipet was incorrectly calibrated so that it transferred less than 10.00 mL of your solution, the density you calculated for the liquid would tend to be smaller or larger than the correct value. Explain.

An advantage of reproduction is that a genetic disorder in a parent might not affect the offspring.

Fill in the coefficients that will balance the following reaction: a0SnSO4 + a1KBr → a2SnBr2 + a3K2SO4

Chemistry and physics are so closely related that sometimes the fields overlap. Which of the following experiments might both chemists and physicists do?

An acid a. has a high ph in solution. b. turns red litmus paper to blue. c. releases hydroxyl ions in solution. d. releases hydrogen (or hydronium) ions in solution.

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.