Liquid sodium is being considered as an engine coolant. how many grams of liquid sodium (minimum) are needed to absorb 8.60 mj of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °c? use cp= 30.8 j/(k·mol) for na(l) at 500 k.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Plzz a sample of table sugar (sucrose, c12h22o11) has a mass of 7.801 g. ● a) calculate the number of moles of c12h22o11 in the sample b) calculate the number of moles of each element in c12h22o11 (number of moles of c, number of moles of h & number of moles of o) in the sample. (use your answer from part a as your starting point.) show your work and highlight your final answer. calculate the number of atoms of each element in c12h22o11 (number of atoms of c, number of atoms of h & number of atoms of o) in the sample. (use your answers from part b as your starting for each element.) show your work and highlight your final answer.

8. how much enthalpy/heat is transferred when 0.5113gof ammonia (nh3) reacts with excess oxygen according| to the following equation: 4nh3 +502 - 4n0+ 6h20ah = -905.4j