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Karo-lina-s [1.5K]
3 years ago
12

Hot coffee in a mug cools over time and mug warms up. Which describes the energy In this system

Chemistry
2 answers:
GenaCL600 [577]3 years ago
8 0

Answer:

The average kinetic energy of the particles in the mug decreases. The average kinetic energy of the particles in the coffee increases. Thermal energy from the mug is transferred to the coffee. Thermal energy from the coffee is transferred to the mug.

Ber [7]3 years ago
7 0

Answer:

thermal energy

Explanation:

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2 years ago
Which statement best explains why calcium has a larger atomic radius than magnesium? A. Calcium has a stronger nuclear charge th
ahrayia [7]

Answer:

B. calcium has electrons in more energy levels than magnesium

Explanation:

atoms are made of three types of subatomic particles - electrons, protons and neutrons.

Neutrons and protons reside in the nucleus of the atom and electrons reside in energy shells

electronic configuration for both Ca and Mg are as follows

Mg - 2,8,2

Ca - 2,8,8,2

outermost energy shell of Mg with electrons is the third energy level

whereas outermost energy shell of Ca with electrons is the fourth energy shell

therefore Ca has a larger atomic radius than Mg as it has one more energy shell than Mg in which electrons reside

7 0
3 years ago
Read 2 more answers
I need help ASAP!
MaRussiya [10]
Calcium reacts gently with water to give hydrogen and calcium hydroxide, which is only slightly soluble, thus slows down the reaction.

It will be assumed that hydrochloric acid used is a dilute aqueous solution.

However, calcium reacts with hydrochloric acid to give calcium chloride which is readily soluble in water, and hydrogen, being a typical reaction of relatively active metals with acids.
Ca(s) + 2HCl(aq)  -> CaCl2(aq) +H2(g) ↑ + heat

The clues that it is a chemical reaction could be:
- formation of a new substance, gaseous hydrogen
- disappearance of a metallic solid in the solution
- heat formed during the vigorous reaction.

As silver is below hydrogen in the electrochemical series, it will not be expected to react with dilute hydrocloric acid. (however, it dissolves in oxidizing acid such as nitric acid, but not displacing hydrogen as a product).

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What happens when water changes from a solid to a liquid to a vapor
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Answer:

It forms a water cycle!

Hope it helps!!!

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Which factors affect the strength of the interaction between two objects with electrical charges?
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The distance between the objects and how much charge the objects have.
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