PLEASE PLEASE HELP! Nitrogen 7
Oxygen 8
Selenium 34
Sulfur 16

Which of the following elements is more reactive than the others?

A. Nitrogen (N)
B. Oxygen (O)
C. Selenium (Se)
D. Sulfur (S)

And please when you answer give a very thorough explanation as to why so I know you are correct and aren’t just here for the points

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will

Which are forms of frozen water? check all that apply. dew frost hail rain sleet