Consider n-butane at 500 k and 20 bar. what is the residual enthalpy, hr, in j/mol?

What is the molar mass of potassium nitrate, kno3

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.