Can someone show me how to do this? What volumes of 60% hydrochloric acid solution and 30% hydrochloric acid solution must be mixed to make 125mL of 36% hydrochloric acid solution?

Answers

Answer 1

Answer:

u need two equations.x + y = 125
0.60x + 0.30y = (0.36)(125)

x + y = 125
0.60x + 0.30y = 45

solve for a variable in the first equation
y = 125 - x

plug into the second equation
0.60x + 0.30(125 - x) = 45
0.60x + 37.5 - 0.30x= 45
0.30x + 37.5 = 45
0.30x = 7.5
x = 25

plug the answer for x into the first equation
25 + y = 125
y = 100

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Answers

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MATHS - 10 POINTS HCF/LCM thankyou!!A car’s service book states that the air filter must be replaced every 10,000 miles and the diesel fuel filter every 24,000 miles.

At how many miles will they both need replacing at the same time?

DO I WORK OUT THE LCM OR HCF?
WHAT IS THE FINAL ANSWER AND WHY??

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Answers

LCM

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25|5
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Number # 11 please !!!

Answers

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Hope this helped!!

In what quadrant on the coordinate plane is the point (5,-2) located? Your answer would be : Quadrant I V

To determine whether voters would be willing to vote for a tax increase to improve the city's schools, the board of education surveys 500 parents of children in the city's schools. Why is this sample likely to be biased?

A.The entire population of the city was not surveyed.

B.Parents of school children are too busy to be bothered with surveys.

C.There are not enough people in the sample.

D.Parents of school children are more likely to be willing to pay more to improve schools.

Answers

B.

This is because, the people who conduct the survey and came to the conclusion of B are making an assumption that they are too busy. This is biased because from the point of view of THEM or even the education board, this could be manipulated in such a way that is not factual.

So in a nutshell, B is bias because it is not 100% factual. Remember, it's all about perspective.

Carson bought 3.9 pounds of chocolate cashrews for $15.84. About how much was the cost per pound?

Answers

Answer: $9.87

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~ Komaljeet (I hope this helped) ♥

What expression is factor of 6x^3-13x^2-28x

Answers

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Hope this helps!

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