Help asap on these heat questions How much heat is required to change the temperature of 20 g of mercury from 50 to 100°C?

What is the specific heat of 120 g of an unknown substance with a temperature change from 15 to 35°C when 690 J heat are applied?

How much mass of lead is required to change the temperature from 200 to 398°C when 2100 J of heat are applied?

answer; i do believe the correct answer is (river); /// good luck

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

b. is the answer hoped i