A 5 Molar solution is diluted from 10 L to 2 L. What is the new molarity of the solution?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]