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Daniel [21]
3 years ago
12

Hey can someone pls help me ASAP thanks!!! ​

Chemistry
1 answer:
Mrac [35]3 years ago
6 0
Your on your own that looks like rocket science
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Which of the following subatomic particles are found surrounding the nucleus and have a negative charge?
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J electrons

Explanation:

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A group of scientists are studying observable matter in a cluster of galaxies. They conclude that the cluster has only a small p
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Answer:

it is because of Dark Matter

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Explanation:

Hope It helps

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5 0
2 years ago
How much potassium chloride is needed to make 0.500 m solution with 1.50 L of water?
Andrew [12]

Answer:

55.9 g KCl.

Explanation:

Hello there!

In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:

m=\frac{mol}{kilograms}

Thus, solving for the moles of solute, we obtain:

mol=m*kilograms

Since the density of water is 1 kg/L, we obtain the following moles:

mol=0.500mol/kg*1.50kg\\\\mol=0.75mol

Next, since the molar mass of KCl is 74.5513 g/mol, the mass would be:

0.75mol*\frac{74.5513g}{1mol}\\\\55.9g \ KCl

Regards!

4 0
3 years ago
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