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?

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work