(PLZ HELP ASAP) N2 + 3H2 --> 2NH3 Calculate the mass of N2 that would be needed to produce from 75.0g of NH3? Show your work by including all values used to determine the answer.

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

What type of matter is made of only one kind of atom