True or false ? endothermic reactions are characterized by net absorption of thermal energy from its surroundings which leads to an increase in temperature of the surroundings ?

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

0.09 moles of sodium sulfate in 12 ml of solution

What does the mass of 0.7891 mol of ferric oxide (fe2o3)