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Minchanka [31]
4 years ago
14

Chanice drives her scooter 7,000 metres north. She stops for lunch

Chemistry
1 answer:
aev [14]4 years ago
3 0

Answer:

Chanice covers distance=12,000 metres

Chanice displacement=8602 metres

Explanation:

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A solution is to be prepared with a sodium ion concentrationof
Lina20 [59]

Answer : The mass of sodium sulfate needed is 5.7085 grams.

Explanation : Given,

Concentration of sodium ion = 0.148 mol/L

Volume of solution = 2.29 L

Molar mass of sodium sulfate = 142 g/mole

First we have to determine the moles of sodium ion.

\text{Concentration of sodium ion}=\frac{\text{Moles of sodium ion}}{\text{Volume of solution}}

0.184mol/L=\frac{\text{Moles of sodium ion}}{2.29L}

\text{Moles of sodium ion}=0.08035mole

Now we have to calculate the moles of sodium sulfate.

The balanced chemical reaction will be,

Na_2SO_4\rightarrow 2Na^++SO_4^{2-}

As, 2 moles of sodium ion produced from 1 moles of Na_2SO_4

So, 0.08035 moles of sodium ion produced from \frac{0.08035}{2}=0.040175 moles of Na_2SO_4

Now we have to calculate the mass of sodium sulfate.

\text{Mass of }Na_2SO_4=\text{Moles of }Na_2SO_4\times \text{Molar mass of }Na_2SO_4

\text{Mass of }Na_2SO_4=0.040175mole\times 142g/mole=5.7085g

Therefore, the mass of sodium sulfate needed is 5.7085 grams.

3 0
4 years ago
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