All categories

1 year ago

How many liters of water should be added to 20 liters of 40% solution of acid to

1 answer:

8 0

The amount of liters of water that should be added to 20 liters of 40% solution of acid to obtain 30% solution is: 6.7 Liters.

<h3>Liters of water needed</h3>

Acid = 0.4× 20

Acid = 8 liters

Water = 0.6× 20

Water = 12 liters

Acid/(Acid+Water)

A / (A + W) = 0.30

8 / (8 + W) = 0.30

2.4 + 0.3W = 8

0.3W = 8 - 2.4

0.3W= 5.6

Divide both side by 0.3W

W=5.6/0.3

W=18.7 Liters

18.7 - 12 = 6.7 Liters (Amount of water that must be added)

Therefore the amount of liters of water that should be added to 20 liters of 40% solution of acid to obtain 30% solution is: 6.7 Liters.

Learn more about Liters of water needed here: brainly.com/question/23918882

#SPJ1

You might be interested in

Sonic rolls up a slope at 9.4 m/s. after 3.0 he is rolling back down ay 7.4 m/s. how far up the hill is he at this time?

vovikov84 [41]

U= 9.4m/s
v= -7.4m/s (Negative sign because it is in the opposite direction as he is rolling back)
t= ?
s= ?
a= ?
Now, a= v-u/t
= -7.4-9.4÷3
=-5.6
By the second equation of motion.
s= ut+1÷2at*2 ( *2 is the power)
s= 9.4×3+1÷2×-5.6×3*2
= 28.2 +(-25.2)
=3
Therefore s or the distance travelled is 3m.

6 0

2 years ago

Determine the range of the function $f(x) = -4x^2-8x-6$. Enter your answer in interval notation.

saveliy_v [14]

Answer:[tex]y=-4x^2 -8x-6

Step-by-step explanation:

6 0

3 years ago

Find the value of c so that the polynomial p is divisible by (x+2)

alexandr1967 [171]

Answer:

The value of c is 8.

Step-by-step explanation:

When a function is divisible by a factor, it will get 0 value. So, you have to substitute x = -2 into p(x) and equals to 0 :

$p(x) = 4 {x}^{3} + c {x}^{2} + x + 2$

$p( - 2) = 4 {( - 2)}^{3} + c {( - 2)}^{2} + ( - 2) + 2$

$4( - 8) + 4c - 2 + 2 = 0$

$- 32 + 4c = 0$

$4c = 32$

$c = 32 \div 4$

$c = 8$

3 0

2 years ago

What's a function linear

jeyben [28]

Answer:

Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable. The independent variable is x and the dependent variable is y.

3 0

3 years ago

Suppose you deposit $12.50 into your savings account each week for 4 weeks and then withdraw $4.80 each week for the next two we

monitta

Answer:

The total change in the amount of money in my account is $ 9.60

Step-by-step explanation:

Given:

Amount of money deposited each week, $A_{d}=\$12.50$