What continent have only one climate?

What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.