Which of the following is true about endothermic reactions? the change in enthalpy is positive and the reactants contain more energy than the products. the change in enthalpy is negative and the reactants contain more energy than the products. the change in enthalpy is positive and the reactants contain less energy than the products. the change in enthalpy is negative and the reactants contain less energy than the products. the change in enthalpy is positive and the reactants contain as much energy as the products.

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

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.

Calculate the mass of 0.750 mol of the following substance. na3po4.