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soldi70 [24.7K]
3 years ago
7

Hiii please help me to balance the chemical equation:

Chemistry
1 answer:
Fed [463]3 years ago
4 0

Answer:

2Na + 2H2O = 2NaOH + H2

Explanation:

hope this helps

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Nuclear energy can be used to power _______. a. street lights b. businesses c. homes d. all of the above Please select the best
Taya2010 [7]
<h3><u>Answer;</u></h3>

All the above

-street lights

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<h3><u>Explanation; </u></h3>
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8 0
3 years ago
WILL OFFER BRAINLIEST IF YOU CAN ANSWER THIS
AleksAgata [21]

Answer:

3

Explanation:

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5 0
3 years ago
A car with a mass of 1,100 kg is moving with a velocity of 30 m/s due east . What is the moment?
dexar [7]
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6 0
3 years ago
If nitrogen-13 has a half life of 2.5 years, how much remains from a 100g sample after 7.5 years
Sonbull [250]

Answer:

12.50g

Explanation:

T½ = 2.5years

No = 100g

N = ?

Time (T) = 7.5 years

To solve this question, we'll have to find the disintegration constant λ first

T½ = In2 / λ

T½ = 0.693 / λ

λ = 0.693 / 2.5

λ = 0.2772

In(N/No) = -λt

N = No* e^-λt

N = 100 * e^-(0.2772*7.5)

N = 100*e^-2.079

N = 100 * 0.125

N = 12.50g

The sample remaining after 7.5 years is 12.50g

5 0
3 years ago
How many moles of each element (C, H, and O) are present in a 100.0 g sample of<br> ethanol?
Anuta_ua [19.1K]

Answer:

2.173 moles of ethanol is presented in a 100.0g sample of ethanol .

Explanation:

The amount of substance that contains as many Particles as there are atoms in exactly 12g of carbon- '12 isotope is called 1 mole '= 46 u.

7 0
3 years ago
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