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Vinil7 [7]
3 years ago
6

Why did the rock collector like his collection of metamorphic rocks so much?​

Chemistry
1 answer:
sdas [7]3 years ago
4 0

Explanation:

ABC looks like the metamorphic rocks are more usable than other rocks

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A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the de
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Displaced volume :

<span> Vf - Vi
</span>
77.0 mL - 50.0 mL => 27 mL

Therefore:

d = m / V

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What is the vapor pressure of a solution that contains 70.0 mL of ether and 30.0 mL of benzene?
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3. Determine the moles of sodium, Na, containing 7.9x1024 atoms.​
-BARSIC- [3]

Answer:

12.7mol Na.

Explanation:

Hello there!

In this case, according to the concept of mole, which stands for the amount of substance, we can recall the concept of Avogadro's number whereby we understand that one mole of any substance contains 6.022x10²³ particles, for the given atoms of sodium, we can calculate the moles as shown below:

7.9x10^{23}atoms*\frac{1mol}{6.022x10^{23}atoms} \\\\

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Regards!

8 0
3 years ago
How do the cells in your body get energy?
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How many liters are in 5.42 mols of O2 gas?<br><br> (2 decimal places)
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