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olchik [2.2K]
2 years ago
8

The molar mass of magnesium (Mg) is 24.30 g/mol. There are 6.02 Times. 1023 atoms in 1 mol.

Chemistry
1 answer:
rjkz [21]2 years ago
8 0
Your answer to this question is 1.20 times 1024 atoms
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Answer:

19 D

20 C

21 B

22 A

23 A

24 A

Explanation:

See the periodic table

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3 years ago
Wastewater discharged into a stream by a sugar refinery contains 3.40 g of sucrose (C12H22O11) per liter. A government-industry
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<u>Answer:</u> The pressure that must be applied to the apparatus is 0.239 atm

<u>Explanation:</u>

To calculate the osmotic pressure, we use the equation for osmotic pressure, which is:

\pi=iMRT

or,

\pi=i\times \frac{m_{solute}}{M_{solute}\times V_{solution}\text{ (in L)}}}\times RT

where,

\pi = osmotic pressure of the solution

i = Van't hoff factor = 1 (for non-electrolytes)

m_{solute} = mass of sucrose = 3.40 g

M_{solute} = molar mass of sucrose = 342.3 g/mol

V_{solution} = Volume of solution = 1 L

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of the solution = 20^oC=[20+273]K=293K

Putting values in above equation, we get:

\pi =1\times \frac{3.40g}{342.3g/mol\times 1}\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 293K\\\\\pi =0.239atm

Hence, the pressure that must be applied to the apparatus is 0.239 atm

3 0
3 years ago
Sulfur has 16 electrons. When it combines with magnesium. It acquires A -2 charge. How many electrons does it have now?
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18 electrons. With a -2 charge, that means it gains two electrons.
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2 years ago
In order to have a contact force acting on an object, the force
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I believe the answer is C. (must be touching the object)

Someone please correct me if I am wrong.
5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%7B%5Clarge%7B%5Cred%7B%5Cmapsto%7B%5Cmaltese%7B%5Cunderline%7B%5Cgreen%7B%5Cboxed%7B%5Cblue%7
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Raoult's law states that the vapor pressure of a solvent above a solution is equal to the vapor pressure of the pure solvent at the same temperature scaled by the mole fraction of the solvent present: Psolution=χsolventPosolvent.

5 0
2 years ago
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