Which of the following equations show the relationship between enthalpy and heat? ΔΗ = 4
ΔΗ = - 4
ΔΗ = 2q
ΔΗ = 1/2q

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

If square root x = -7, then x= -49 true or false

Apasta salad was chilled in the refrigerator at 35° f overnight for 9 hours. the temperature of the pasta dish dropped from 86° f to 38° f. what was the average rate of cooling per hour?