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2 years ago

A college student drives 40 miles roundtrip each weekday to attend class. His car gets 18 miles per

1 answer:

3 0

In four weeks of commuting to school, it is expected the student saves a total of $13.32 if the prices went down from $2.49/gallon to $2.19.

<h3>How many gallons of gasoline does the student need each day and each week?</h3>

It is known, the total distance each day is 40 miles; moreover, the car requires 1 gallon of gasoline per 18 miles. Based on this, let's calculate the number of gallons of gasoline required:

40 miles / 18 miles = 2.22 gallons of gasoline

Now, if the student requires 2.22 gallons of gasoline everyday, the total number of gallons of gasoline per week is:

2.22 x 5 days = 11.1 gallons of gasoline
11.1 x 4= 44.4 gallons per month

<h3>How much will the student save?</h3>

Money spent with the regular gasoline price

44.4 gallons of gasoline x $2.49 = $110.55

Money spend with the new price:

44.4 gallons of gasoline x $2.19 = $97.23
$110.55-$97.23 =$13.32

Learn more about gasoline price in: brainly.com/question/13898342

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The reaction equation for the given reaction will be as follows.

$HCl + NaOH \rightarrow NaCl + H_{2}O$

Each mole of both HCl and NaOH gives one mole of water.

Also, it is given that 1 liter of NaOH and HCl solution contains 1.6 mol $dm^{-3}$ of NaOH (HCl).

It is known that 1 $cm^{3}$ = 0.001 liter. So, 87 $cm^{3}$ = 0.087 liter.

Hence, number of moles of water obtained from the given reaction are as follows.

0.087 liter × 1.6 mol = 0.1392 moles

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