The heat of vaporization of ammonia is 23.4 kJ/mol. How much heat is required to vaporize 1.00 kg of ammonia?

The answer is 1376.5 kJ, but I want the solving for:

How many grams of water at 0°C could be frozen to ice at 0°C
by the evaporation of this amount of ammonia?

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe