Questions 13 and 14 look at the pic
1 answer:
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Answer:
Explanation:
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In this case, since the molarity of magnesium chloride (molar mass = 95.211 g/mol) is 1.672 mol/L and we know the density of the solution, we can first compute the concentration in g/L as shown below:
Next, since the density of the solution is 1.137 g/mL, we can compute the concentration in g/g as shown below:
Which is also the by-mass fraction and in percent it turns out:
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Answer:
The amount is
Explanation:
From the question we are told that
The distance traveled per day is
The cost of one liter is
The car's gas mileage is
Generally the amount of distance covered in one week is evaluated as
The amount of gas used in one week by the car is mathematically represented as
=>
=>
converting to liters
Thus the amount spent on gas in one week is
=>
=>