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Alisiya [41]
3 years ago
13

On December 25th, 1776, General George Washington’s Continental Army crossed the Delaware River and defeated troops of Hessians

(German soldiers fighting for the British). Here’s a fictionalized account of that historical event: “While our general stood bravely in the Christmas Day cold, I shivered from more than just the icy wind. Beyond the river were enemy soldiers from the most obscure corners of Europe. I could barely fathom the unknown monsters ahead.” How did the fiction author make the factual account more exciting? A The author altered the chronology of the historical events. B The author omitted the factual details, because readers already know them. C The author enhanced the drama by altering the description of the enemy troops. D The author created a sense of danger by changing the setting of the event.
Chemistry
1 answer:
m_a_m_a [10]3 years ago
7 0

Answer:the answer is C

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How much heat (in kJ) would need to be removed to cool 150.3 g of water from 25.60°C to -10.70°C?
olga_2 [115]

Answer:

Q = -22.9 kJ

Explanation:

Given that,

Mass of water, m = 150.3 g

Water gets cool from 25.60°C to -10.70°C.

The specific heat of water, c = 4.2 J/g°C

The formula for heat needed is given by :

Q=mc\Delta T\\\\Q=150.3\times 4.2 \times (-10.7-25.6)\\\\Q=-22914.738\\\\or\\\\Q=22.9\ kJ

So, 22.9 kJ of heat is needed to be removed to cool.

8 0
3 years ago
what is the half life of a radioactive sample if 100.0 grams of it decays to 12.5 grams in 24.3 hours
frutty [35]

The Half-Life of the radioactive sample is 8.1 hours.

<h3>What is half life of a radioactive element?</h3>

The half-life of a radioactive substance is the time taken for half the amount of atoms in the given substance to decay.

12.5 grams remains out of 100 grams of the sample.

This is 1/8 of the original samples.

1/8 of the original sample reperesent three half-lives undergone.

Half-Life of the radioactive sample = 24.3/3 = 8.1 hours

Therefore, the Half-Life of the radioactive sample is 8.1 hours.

Learn more about Half-Life at: brainly.com/question/25750315

#SPJ1

7 0
2 years ago
The Lithium atom has only two energy levels. The third is empty. Therefore, we can refer to the second energy level of the lithi
Minchanka [31]

Answer:

H=1

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C=4

Si=4

N=5

P=5

O=6

S=6

F=7

Cl=7

Ne=8

Ar=8

He=8

Explanation:

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