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SOVA2 [1]
3 years ago
12

Someone help please????

Chemistry
2 answers:
Mandarinka [93]3 years ago
7 0

Answer:

A is the answer

Explanation:

Dafna1 [17]3 years ago
4 0

Answer:

A

Explanation:

Your answer is A

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What are observable changes when burning a log?
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Log being dissolved and sparkes flaring out
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Chemical formula of magnesium<br> oxide using Criss cross method​
erik [133]

Answer:

Crisscross method is simply writing the charges crossly near each element. Since oxidation number of Mg (metal) is +2 and oxygen (nonmetal) is -2, if we cross them and write next to each; we get Mg2O2 .

6 0
3 years ago
The density of mercury is 13.6 g/cm3 what is the mass of 8.20 ml of mercury
Alisiya [41]

Answer:

The answer is

<h2>111.52 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density of mercury = 13.6 g/cm³

First we must convert the volume from mL to cm³

if 1 mL = 1 cm³

Then 8.20 mL = 8.20 cm³

volume = 8.20 cm³

The mass of mercury is

mass = 13.6 × 8.2

We have the final answer as

<h3>111.52 g</h3>

Hope this helps you

4 0
3 years ago
At lower altitudes what does the troposphere have that is a major factor in the formation of weather?
slavikrds [6]
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5 0
3 years ago
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A chemist must dilute 47.2 mL of 150. mM aqueous sodium nitrate solution until the concentration falls to . He'll do this by add
erma4kov [3.2K]

Answer:

0.295 L

Explanation:

It seems your question lacks the final concentration value. But an internet search tells me this might be the complete question:

" A chemist must dilute 47.2 mL of 150. mM aqueous sodium nitrate solution until the concentration falls to 24.0 mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits. "

Keep in mind that if your value is different, the answer will be different as well. However the methodology will remain the same.

To solve this problem we can<u> use the formula</u> C₁V₁=C₂V₂

Where the subscript 1 refers to the concentrated solution and the subscript 2 to the diluted one.

  • 47.2 mL * 150 mM = 24.0 mM * V₂
  • V₂ = 295 mL

And <u>converting into L </u>becomes:

  • 295 mL * \frac{1 L}{1000mL} = 0.295 L

6 0
4 years ago
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