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pashok25 [27]
3 years ago
10

How many molecules are their in o.5 mole of H2o

Chemistry
1 answer:
Black_prince [1.1K]3 years ago
3 0

Answer:

There are 6.022x10^23 molecules

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What is the volume of 8.50 moles of hydrogen gas?
Cerrena [4.2K]
Okay! 
8.50molH, represents 8.50 moles of Hydrogen gas!

To convert from moles to volume multiply it by the ratio of L/molH
mol of anything in a conversion problem is always 1 unless you are going to an unknown! Try to memorize this, but the number you always put in for the # of liters in a conversion problem is 22.4L (L is a measure of volume) 

8.50molH * (22.4 L/ 1 molH)

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Hope that helped!
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3 years ago
Calculate the mass percent of calcium chloride in 8.87 g of calcium chloride in 65.1 g of water
zhannawk [14.2K]

Answer:

11.99 % ≅ 12.0%.

Explanation:

∵ mass % = [mass of solute/mass of solution] x 100.

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<em>∴ mass % of (CaCl₂) = [mass of solute/mass of solution] x 100 </em>= ( 8.87 g/ 73.97 g) x 100 = <em>11.99 % ≅ 12.0%.</em>

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B. False, have a connection between chemistry and physis
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Cl-35, as the atomic mass of Chlorine (35.45) is closer to the number 35 than to the number 37. A higher abundance of CL-35 isotope would have caused the atomic number (which is an average of the values of all isotopes of a substances taking relative abundance into consideration) to decrease from 36, which would appear to be the average.
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