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kiruha [24]
2 years ago
9

Someone help me please i’ll give brainly

Chemistry
1 answer:
drek231 [11]2 years ago
7 0
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2>

\huge\boxed{Sublimation}

<h2>_____________________________________</h2><h2>Sublimation:</h2>

Sublimation is a process in which the solid molecules gain energy from their surrounding and they now have enough energy to overcome the force of attraction with the neighboring molecules, thus they escape into the surrounding without going through the liquid phase, that means they directly jump to the vapor phase.

<h2>_____________________________________</h2><h2>Endothermic</h2>

Those process which absorb energy from their surrounding to form the product are called endothermic process. Since the SUBLIMATION requires additional energy, it is an endothermic change.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />
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Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydr
lara [203]

Answer: A) grinding coffee beans

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.

1. Grinding coffee : Only change in size takes place, thus a physical change

2. Baking a cake: the chemical reaction occurs by combination of flour with oxygen , thus a chemical change.

3.:converting water to hydrogen and oxygen: The decomposition iof water takes place, thus is a chemical change

4.Burning of coal: the chemical reaction occurs by combination of carbon with oxygen , thus a chemical change.

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2 years ago
Major Battles of the
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Answer: Lexington and Concord

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3 years ago
A substance has a volume of 10.0 cm³ and a mass of 89 grams. What is its density?
lara [203]

Answer:

8.9 g / cm^3

Explanation:

Density = mass / volume

We are given volume which is 10.0cm^3 (cm^3 is just fancy way of saying ml), and mass of 89 gram. Just plug them in respective spots.

Density = 89 / 10.0 = 8.9 g / cm^3

4 0
2 years ago
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What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), an
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Describe the structure of an atom. Be sure to include the terms nucleus, electron cloud, protons, neutrons, and electrons in you
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Answer:

The answer would be A because inside of an atom is protons and neutrons. Protons are + neutrons are neutral and electrons are -. The electron cloud is big not small.

Explanation:

Hope this helps, have a great day. God Bless you.

3 0
3 years ago
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