Asolution of ammonia has a ph of 11.8. what is the concentration of oh– ions in the solution?

a.) 1.00 x 10^-14 m
b.) 6.33 x 10^-3 m
c.) 1.58 x 10^-12 m
d.) 1.58 x 10^-4 m

Which of the following units is not an official si unit? mole liter kilogram ampere

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

At the current rate, a graph of carbon dioxide produced by fossil fuels over time would slope upward slope downward be horizontal be vertical