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Jet001 [13]
3 years ago
9

An electron is traveling at 1.500 × 105 m/s. What is its speed in light years per century? (useful conversion factors: 1 light-y

ear ≡ 9.460730472580800 × 1015 m)
Chemistry
1 answer:
mixer [17]3 years ago
4 0

ok that one is pretty hard IDK you should do it your self.

sorry you are on your own on this one


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A chemist prepares a solution of potassium dichromate by measuring out of potassium dichromate into a volumetric flask and filli
riadik2000 [5.3K]

Answer:

0.297 mol/L

Explanation:

<em>A chemist prepares a solution of potassium dichromate by measuring out 13.1 g of potassium dichromate into a 150 mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's potassium dichromate solution. Be sure your answer has the correct number of significant digits.</em>

<em />

Step 1: Calculate the moles corresponding to 13.1 g of potassium dichromate

The molar mass of potassium dichromate is 294.19 g/mol.

13.1 g × (1 mol/294.19 g) = 0.0445 mol

Step 2: Convert the volume of solution to L

We will use the relationship 1 L = 1000 mL.

150 mL × (1 L/1000 mL) = 0.150 L

Step 3: Calculate the concentration of the solution in mol/L

C = 0.0445 mol/0.150 L = 0.297 mol/L

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3 years ago
Why does a 4 carbon linear alkane, butane c4h10, have two more hydrogens ?
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