Ineed with question 14 and 15 and it’s very hard and i’m struggling with it and if you need to see the picture big then click on it and it will be big

What is the formula of the ionic compound composed of calcium cations and chloride anions

What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?

4786 joules of heat are transferred to a 89.0 gramsample of an unknown material, with an initialtemperature of 23.0°c. what is the specific heat of thematerialif the final temperature is 89.5 °c?