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Ray Of Light [21]
3 years ago
15

Trey runs 80 meters to the north in 20 seconds. what is his velocity

Chemistry
1 answer:
Aleks [24]3 years ago
8 0

Answer:

4 North

Explanation: 80 North / 20 Sec = 4 North

Plz give me brainliest, I need to level up.

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ecosystem

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3 years ago
Our good friend and pseudo scientist, homer simpson, attempts to analyze 300 mg of an unknown compound containing only c and h b
iragen [17]
C_{x}H_{y} + O_{2} --\ \textgreater \  x CO_{2} + \frac{y}{2} H{2}O

540mg H_{2}O* \frac{1 mmol H_{2}O}{18 mg H_{2}O} =30 mmol H_{2}O

\\ \\30 mmolH_{2}O   -have  -  60 mmol H
\\  \\ 60 mmol H* \frac{1mg H}{1 mmol H}    =60 mg H
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\\ \\ 240 mgC* \frac{1mmol}{12mg} =20 mmol C

20 mmol C: 60 mmol H=1 mol C : 3 mol H


7 0
4 years ago
Which statement best describes how energy is important to chemistry?
nordsb [41]

Answer:

C. Energy is absorbed and released during chemical reactions,

Explanation:

All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy.

7 0
3 years ago
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Which of the following does not involve colligative properties?
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The answer is d. calcium silicide is added to liquid steel to increase the steel's ability to freeze 
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ss7ja [257]

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