Which of the following is not a phase change?melting of snow
evaporation of water from the ocean
condensation of water vapor to form clouds
hydrogen and oxygen gas combining to form water vapor

Answers

Answer 1

Answer:

Answer : The correct option is hydrogen and oxygen gas combining to form water vapor.

Explanation :

Phase change : It is a change from one state to another state without changes in chemical composition.

Phase change such as solid to liquid, liquid to vapor, vapor to liquid, liquid to solid, vapor to solid, solid to vapor.

Melting of snow is a fusion process in which phase changes from solid to liquid.

Evaporation of water from the ocean is a evaporation process in which phase changes from liquid to vapor.

Condensation of water vapor to form clouds is condensation process in which phase changes from vapor to liquid.

Hydrogen and oxygen gas combining to form water vapor, there is no phase change in this reaction because a gas combine with another gas to form a water vapor as a gas.

Answer 2

Answer: hydrogen and oxygen gas combining to form water vapor is the correct answer.

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Answers

The planet that orbits in a near circle is EARTH :D

Venus is the planet with the smallest orbital eccentricity. This sounds like more of a physics question, though.

In an exothermic reaction the bonding energy of the product is ?

Answers

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Answers

One way of expressing concentration is by molarity. It is the amount of solute per unit volume of the solution. Usually, it takes the unit mol/L. The calculation for this problem is as follows:

1.02 mM = (1.02 mol / mL) (2.0 mL) = 2.04 mol

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Answers

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

The answer is "the quantity of heat that is required to raise 1 g of the sample by 1°C (Kelvin) at a constant pressure"

Answer:

Explanation:

I just took the test twice and it wasn't D the first time

Which set of procedures and observations indicates a chemical change?(1) Ethanol is added to an empty beaker and the ethanol eventually disappears.
(2) A solid is gently heated in a crucible and the solid slowly turns to liquid.
(3) Large crystals are crushed with a mortar and pestle and become powder.
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Answers

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