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ra1l [238]
3 years ago
10

Helpppppppppppppppppp last question!

Chemistry
1 answer:
larisa [96]3 years ago
5 0

Answer:

C. protons and electrons are far apart with empty space in between

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VikaD [51]

Imagine a chemist is in the lab and trying to make some chemical reactions happen. In one reaction she reacts chemicals in an exothermic reaction and there is an increase in entropy. A second chemical reaction she is trying to run is endothermic and there is a decrease in entropy. Which of the two reactions is more likely to occur and why?

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Why does an exothermic reaction need activation energy?
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Activation energy is needed so reactants can move together, overcome forces of repulsion, and to begin breaking bonds.

Explanation:

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3 years ago
How many formula units are there in 212 grams of mgCl2
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Formula units are there in 212 grams of MgCl₂ are 830.56

Formula is the empirical of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations and it is the lowest whole number ratio of ions represented in an ionic compound

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1 mole of magnesium chloride has mass = 95.211 gram and contains 6.022×10²³formula units of magnesium chloride

Here 212 grams×6.022×10²³form unit of MgCl₂/95.211 gram = 830.56

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