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3 years ago

14

how much of other chemicals must be evaporated from 400grams of a hand sanitizer that is 24% alcohol to strengthen it to a hand

sanitizer that is 30% alcohol? correct your answer to the nearest whole number

1 answer:

tatiyna3 years ago

4 0

Answer:

80 grams

Step-by-step explanation:

Weight of 24% solution = 400 grams

Alcohol content= 24%

Amount of alcohol= 400*0.24= 96 grams

Weight of 30% solution with same amount of alcohol:

96/0.3= 320 grams

The difference in weights is the other chemicals evaporated:

400-320=80 grams

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Which property yields Step 2

abruzzese [7]

Answer:

D) Commutative property of addition

Step-by-step explanation:

Commutative property of addition

a + b = b + a

On this case

-12 + 5x = 5x - 12

Answer

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3 years ago

The original price of a ski jacket was $240. It was on sale at a 25% discount. Arianna had a coupon for an additional 10% off th

Sveta_85 [38]

Hi!

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8 0

3 years ago

A community had a population of 12,000 in 1985, which is increased to 20,000 in 2010. The saturation population is 80,000. Estim

ivann1987 [24]

Answer:

The right answer is :

(a) 23,200

(b) 24,514

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Step-by-step explanation:

According to the question,

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$P_2 = 20000$

$P_{sat}=80000$

(a)

We know that the arithmetic growth formula will be:

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here,

⇒ $K=\frac{P_2-P_1}{\Delta t}$

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$=\frac{80000}{25}$

$=320$

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(b)

The geometric growth formula will be:

⇒ $P=ln(Pi)+K\times t$

here,

⇒ $K=\frac{lnP_2-lnP_1}{\Delta t}$

$=\frac{ln(20000)-ln(12000)}{25}$

By putting the values of general log, we get

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(c)

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from here, we get

$=0.005$

hence,

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$=80000-(60000)e^{-0.005\times 10}$

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5 0

3 years ago

Which pair of triangles can be proven congruent by SAS?

wolverine [178]

Answer:

top choice

Step-by-step explanation:

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The top choice shows side-angle-side.

The middle choice shows angle-side-angle.

The bottom choice shows side-side-side.

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3 years ago

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saveliy_v [14]

Answer:

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3 years ago