A chemical reaction gives off 2,100 kJ of heat energy.

About how many calories is it equal to?

(1 calorie=4.18 Joules)

5.0 * 10³ calories

5.0*10^4 calories

5.0*10^5 calories

5.0*10^6 calories

What is the mass in grams of 1.25 mol of the element beryllium?

A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.4kPa if P (He) = 68.7kPa and P (CO2) = 1.4kPa?

What substances are used as moderators in a nuclear reactor? A. carbon and water B. liquid sodium and water C. plutonium and neptunium D. cadmium or other metals ansewer is A. carbon & water

Two atoms of the same element

Where does fat go? C54H108O6

What mass of carbon can 3000 J of energy raise from 12°C to 40°C?

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2

How many grams of methane, CH4 are produced from the complete reaction of 5.15 moles of carbon monoxide, CO

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?