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alexgriva [62]
3 years ago
8

Which statement is true of a chemical change? (Plato)

Chemistry
2 answers:
MrRa [10]3 years ago
6 0

Answer: i think A

Explanation: if i got it right could you mark me as brainliest

OleMash [197]3 years ago
5 0

Answer:

A

Explanation:

The answer A is the best answer because it contains the most general characteristic of a chemical change.

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When 32 grams of aluminum react, the actual yield is 105.5 grams, what is the percent yield?
user100 [1]

Answer:

329.7%

Explanation:

Percent Yield = Actual Yield/ Theoretical Yield x 100%

Percent Yield = 105.5g/32 x 100% = 329.69 ≈ 329.7 %

5 0
3 years ago
What is the mass of 2.40 moles of magnesium chloride, mgcl2
LiRa [457]

Hey there!

MgCl₂

Find molar mass of magnesium chloride.

Mg: 1 x 24.305

Cl: 2 x 35.453

--------------------  

          95.211 grams

One mole of magnesium chloride has a mass of 95.211 grams.

We have 2.40 moles.

2.40 x 95.211 = 228.5

To 3 sig figs this is 229.

The mass of 2.40 moles of magnesium chloride is 229 grams.

Hope this helps!

4 0
3 years ago
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Answer:

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Explanation:

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Answer:

Explanation:

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4 0
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What must be satisfied for a hypothesis to be useful?
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