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3 years ago

How many minutes will it take for a car traveling 74 miles per hour to cover 6.50 kilometers?

Chemistry

1 answer:

Dvinal [7]3 years ago

4 0

Answer:

3.27 minutes

Explanation:

To solve this problem we will first convert miles/hour to km/min. For this purpose we will require following reference conversions as;

1 Mile = 1.60934 Km

And,

1 Hour = 60 min

Therefore,

As,

1 Mile = 1.60934 Km

Then,

74 Miles = X Km

Solving for X,

X = 74 miles × 1.60934 Km ÷ 1 mile

X = 119.10 Km

Therefore,

119.10 Km were travelled in = 60 min

So,

6.50 Km will be travelled in = X min

Solving for X,

X = 60 min × 6.50 Km ÷ 119.10 Km

X = 3.27 minutes

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The mole fraction of A and B are related to each other as follows:

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In this problem, A is hexane and B is octane, mole fraction of hexane is given 0.580 thus, mole fraction of octane can be calculated as follows:

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Putting the values,

$P=(0.580)(183 mmHg)+(0.420)(59.2 mmHg)=131 mmHg$

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