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vaieri [72.5K]
3 years ago
15

Convert 75 minutes to seconds

Chemistry
2 answers:
mihalych1998 [28]3 years ago
8 0
Greetings!

We know that each individual minute has 60 seconds. To find out how many seconds are in 75 minutes, we have to apply the same rate as the one we just established (1 minute = 60 seconds) 

In this formula, the minute is divided by number of seconds. The x variable represents seconds in 75 minutes:
\frac{1}{60}=\frac{75}{x}

Cross multiply the terms: 
(1)(x)=(75)(60)

x=4500

Therefore, there are 4500 seconds in 75 minutes 

I hope this helped!
-Benjamin
miv72 [106K]3 years ago
4 0
There is 60 secs in a minute. MULTIPLE 60 and 75 t0 get your answer.
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Andre45 [30]

part 1 : the final volume : 1.404 L

part 2 : the initial concentration : 4.06 M

<h3>Further explanation </h3>

Dilution is the process of adding a solvent to get a more dilute solution.

The moles(n) before and after dilution are the same.

Can be formulated :

M₁V₁=M₂V₂

M₁ = Molarity of the solution before dilution  

V₁ = volume of the solution before dilution  

M₂ = Molarity of the solution after dilution  

V₂ = Molarity volume of the solution after dilution

part 1 :

M₁=44.8%

V₁=0.73 L

M₂=23.3%

\tt V_2=\dfrac{M_1.V_1}{M_2}\\\\V_2=\dfrac{44.8\times 0.73}{23.3}\\\\V_2=1.404~L

part 2 :

V₁=739 ml=0.739 L

V₂=1.5 L

M₂=2

\tt M_1=\dfrac{M_2.V_2}{V_1}\\\\M_1=\dfrac{2\times 1.5}{0.739}\\\\M_1=4.06

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3 years ago
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Explanation:

This task is a joint variation task involving only direct proportionality:

Direct variation is one in which two variables are in direct proportionality to each other. This means that as one increases, the other variable also increases and vice - versa.

Joint variation is one in which one variable is dependent on two or more variables and varies directly as each of them.

In this exercise:

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lys-0071 [83]

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