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FromTheMoon [43]
2 years ago
6

Please help. im freaking out rn. i have like 40 missing assignments please

Chemistry
1 answer:
Katarina [22]2 years ago
5 0

Answer:

I'm pretty sure its the one that says very little at the beginning but if I get it wrong I'm sorry

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What is the chemical symbol of an element
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A chemical symbol is a shorthand method of representing an element. Instead of writing out the name of an element, we represent an element name with one or two letters. As you know, the periodic table is a chemist's easy reference guide. ... Each element is represented by a chemical symbol consisting of letters

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Why is it necessary to find the percent yield of a reaction? A. to determine the efficiency of the reaction B. to determine the
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Answer:

A. to determine the efficiency of the reaction

Explanation:

  • Percentage is the ratio of the actual yield to theoretical yield as a percentage. It is calculated by dividing the actual yield by theoretical yield then multiplying by 100%.
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A sample of gas is in a sealed rigid cointaner that maintains a constant volume which changes occur between the gas particles wh
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In the given situation, the gas is heated under constant volume. As energy is supplied to the system in the form of heat, the frequency of collision between the gas particles increases. This increases the temperature of the gas consequently bringing about a decrease in pressure.

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Here, P/T = nR/V

If P1, T1   and P2, T2 are the pressure and temperature values before and after heating respectively, then since nR/V is a constant in this case, we have

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An exploding star is known as a
jonny [76]

Answer:

supernova

An exploding star is known as a supernova

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If Bromine belongs to the group halogens in group 7a, what do you know about the
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it has 7 electrons and it react to the elements with only 1 valence electron, which are elements in group 1

Explanation:

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