HEL QUICK PLEASE (75 points) What is the pH of a solution with a concentration of 4.2 × 10–5 M H3O+?
A. 2.31
B. 4.38
C. 5.62
D. 6.87

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

In which phase(s) do the molecules take the shape of the container?

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water