What carries the useful energy of a lamp to its surroundings

What is the number of Joules needed to change 40.0 grams of water at 100°C to steam at the same temperature and pressure? 1.13,360 J 2.90,400 J 3.167.2 J 4.16,720 J

Why does the level of water not change when common salt is dissolved in water

Part a - calculate the value of q what is the value of q when the solution contains 2.00*10-3 m ca2 + and 3.00*10-2m so42-? express your answer numerically.

7. Which is NOT completed during interphase? Cell function production of energy in the cell wall replication of DNA and organelles Cell growth

How much work is done to raise a 20N box 4m?

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.