An atom of iron has the atomic number 26 and a mass number of 56. how many protons plus neutrons are in the nucleus? a. 30b. 26c. 56d. 82

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

Apump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume