What on earth is this :/

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2