What is the amount of charge on a calcium ion if its neutral atom has lost two valence electrons? A. 1+
B. 2+
C. 3+
D. 4+

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

During which time interval does the object travel approximately 10 meters

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?