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Marina86 [1]
3 years ago
14

Explain why 0.76 * 103 would not be considered a correct answer for a scientific notation problem? What should be done to fix th

is? Give the correct answer.
Chemistry
2 answers:
Valentin [98]3 years ago
7 0
The decimal should be after the 7 and before the 6.
Tema [17]3 years ago
6 0

Scientific notation is always expressed as a number between 1 and 10 not including 10 followed by 10 to a power.

1 ≤ x < 10

7.6 * 10^2 is the correct answer. You used one of the powers to get to a number between 1 and 10

0.76 * 10 = 7.6 That leaves you with 2 tens.

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6 0
3 years ago
Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid
Elena-2011 [213]

Answer:

Percent yield =  90.5%

Explanation:

Given data:

Mass of carbon dioxide = 500 g

Mass of water = excess

Actual yield of carbonic acid = 640 g

Percent yield = ?

Solution:

Balanced chemical equation:

CO₂ + H₂O  → H₂CO₃

Number of moles of carbon dioxide

Number of moles  = Mass / molar mass

Number of moles = 500 g/ 44 g/mol

Number of moles = 11.4 mol

Now we will compare the moles of H₂CO₃ with CO₂.

                              CO₂          :              H₂CO₃

                                 1             :                  1

                               11.4           :                11.4

Mass of carbonic acid:

Mass = number of moles × molar mass

Mass = 11.4 mol × 62.03 g/mol

Mass = 707.14 g

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield =  640 g/ 707.14 g × 100

Percent yield =  90.5%

7 0
3 years ago
MgSO4equilibrate the hydrolysis reaction
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Answer:

just guessing, but hydrolisis indicates ; hydro= h2o. lisis= destruction.

Explanation:

in my training, this wud mean destruction of water, or loss of water in the human body.

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Explanation:

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