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Sveta_85 [38]
3 years ago
5

Two chlorides on the carbon of a methane unit are called: (choose one)

Chemistry
2 answers:
ryzh [129]3 years ago
4 0
Methyl chloride
dichloromethane
True [87]3 years ago
4 0

While naming a haloalkane, the root name must have the name of the longest carbon chain containing the halogen atoms. The type of halogen is given as the prefix (chloro, bromo, iodo). When more than one halogen atom is present attached we use the multiplier in front of the halo prefix( dichloro, trichloro, etc.,)

Therefore when there are two chlorine atoms on the same carbon of methane group, it would be named as dichloromethane.

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Calculate the volume (liters) of solution that can be prepared from 180. grams of K2Cr2O7 for a 0.200M solution.
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Answer:

The volume of the solution is 0.305 liters.

Explanation:

Molar mass is the amount of mass that a substance contains in one mole. The molar mass of K₂Cr₂O₇ is 294 g / mole. Then you can apply the following rule of three: if by definition of molar mass 294 grams of the compound are contained in 1 mole, 180 grams are contained in how many moles?

moles=\frac{180 grams*1mole}{294 grams}

moles= 0.61

Molarity is a measure of the concentration of a substance that is defined as the number of moles contained in a certain volume. So, the molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units \frac{moles}{liter}.

In this case:

  • molarity= 2 M
  • number of moles of solute= 0.61 moles
  • volume= ?

Replacing in the definition of molarity:

2 M=\frac{0.61 moles}{volume}

Solving:

volume=\frac{0.61 moles}{2 M}

volume= 0.305 liters

<u><em>The volume of the solution is 0.305 liters.</em></u>

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