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LenKa [72]
3 years ago
11

Can a element be decomposed by chemical means

Chemistry
1 answer:
ratelena [41]3 years ago
7 0
No, an element is a pure substance, it cannot be broken down into simpler substances or be decomposed by chemical means.
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Write the following number using Scientific notation : 13,215,296.50 *​
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Answer:

13.22x10^7

Explanation:

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How does experiments help scientist learn about the world
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Experiments test the scientists' ideas.

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What mass of Sodium Chloride is required to make 100.0 mL of 3.0 M solution?
Julli [10]

Answer:

17.55 g of NaCl

Explanation:

The following data were obtained from the question:

Molarity = 3 M

Volume = 100.0 mL

Mass of NaCl =..?

Next, we shall convert 100.0 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

100 mL = 100/1000

100 mL = 0.1 L

Therefore, 100 mL is equivalent to 0.1 L.

Next, we shall determine the number of mole NaCl in the solution. This can be obtained as follow:

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Mole of NaCl =?

Molarity = mole /Volume

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Cross multiply

Mole of NaCl = 3 × 0.1

Mole of NaCl = 0.3 mole

Finally, we determine the mass of NaCl required to prepare the solution as follow:

Mole of NaCl = 0.3 mole

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl =?

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0.3 = mass of NaCl /58.5

Cross multiply

Mass of NaCl = 0.3 × 58.5

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Therefore, 17.55 g of NaCl is needed to prepare the solution.

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3 years ago
MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Between 40 degrees celsius and 60 degrees celsius, the monohydrat
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Answer:

\%\ Composition\ of\ phosphorus=20.00\ \%

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\%\ Composition\ of\ phosphorus =\frac{Mass_{phosphorus}}{Total\ mass}\times 100

\%\ Composition\ of\ phosphorus=\frac{31}{155}\times 100

\%\ Composition\ of\ phosphorus=20.00\ \%

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3 years ago
Which is the study of the processes within living organisms?
rewona [7]
Biology, I believe xx
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