Heat is the total potential energy of a substance that can be transferred. TRUE FALSE

Ammonia (NH3 (g), Hf = - 45.9 kJ/mol) reacts with oxygen to produce nitrogen and water (H2 O (g), Hf = - 241.8 kJ/mol) according to the equation below. What is the enthalpy of the reaction? 1) - 3,572.1 kJ 2) - 1,267.2 kJ 3) 1,267.2 kJ 4) 3,572.1 kJ

how can you remove the permanent hardness of water by premutit method explain with figure and equation

What comes first in a thunderstorm?

Which of the following statements about gases is false?

Give an example for each of the following terms: (a) matter, (b) substance, (c) mixture.

Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each use the same stopwatch to measure the time.

An electronic circuit element consists of 23 mg of silicon. An electric current through the circuit adds heat at a rate of 7.4 x 10-3 J/s.

If an object sinks in water it's density is less than that of water true or false

What is the main link between water in the oceans and on land

Which of the following pairs lists a substance that can neutralize H2SO4 and the salt that would be produced from the reaction? CaOH2 and Ca (SO4) 2 LiOH and Li2SO4 NH4 and NH4SO4 NH3 and (NH3) 2SO4