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Mathematics, 04.08.2019 00:40 abigailstolp

On average, seawater in the world oceans has a salinity of about 3.5%. how much seawater need to have evaporated to leave 100g salt?

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Answer from: mommer2019

The answer is: " 2,857. 143 g seawater " .

Explanation:

(3.5 parts salt) /(100 parts water) = (100g salt)/ ("x" grams seawater) ;

Solve for "x" , {the amount of seawater, in "grams" (g), needed to have evaporated to leave 100 g salt}.

Cross multiply:

100* 100 = (3.5)x ;

10,000 = (3.5)x ;

↔ (3.5)x = 10,000 ;

Divide each side of the equation by "(3.5)" ; to isolate "x" on one side of the equation ; & to solve for "x" ;

→ (3.5)x / (3.5) = (10,000) / (3.5) ;

→ x = (10,000) / (3.5) ;

→ x = 2857.1428571428571429 ; → round to: 2,857. 143 ;

→ round to: " 2,857. 143 g seawater " .

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Answer from: omgomglol

The amount of sea water need to have evaporated to leave 100g salt is $\boxed{2857.14{\text{ gram or 2}}{\text{.85714 kilogram}}}.$

Further Explanation:

The unit of the salinity is ${\text{gram}}/{\text{gram}}$

Given:

The salinity of the seawater is $3.5\%.$

The amount of salt is $100{\text{ gram}}.$

Explanation:

The given salinity of the seawater is $3.5\%.$

The salinity of the seawater is $3.5\%$ means that $3.5{\text{ gram}}$ of salt is present in the $100{\text{ gram}}.$

Consider the amount of seawater need to have evaporated to leave 100g salt be $x{\text{ gram}}.$

The amount seawater need to have evaporated to leave 100g salt can be calculated as follows,

$\begin{aligned}\frac{{3.5}}{{100}}&= \frac{{100}}{x}\\3.5 \times x &= 100 \times 100\\x&=\frac{{10000}}{{3.5}}\\x&= 2857.14{\text{ gram}}\\\end{aligned}$

The weight of the seawater in kilogram can be obtain as follows,

$\begin{aligned}x&=\frac{{2857.14}}{{1000}}\\&= 2.857{\text{kilogram}}\\\end{aligned}$

The amount of sea water need to have evaporated to leave 100g salt is $\boxed{2857.14{\text{ gram or 2}}{\text{.85714 kilogram}}}.$

Learn more:

Learn more about inverse of the functionhttps://link.Learn more about equation of circle link. Learn more about range and domain of the function link

Answer details:

Grade: Middle School

Subject: Mathematics

Chapter: Mensuration

Keywords: Average, seawater, the world, oceans, salinity, 3.5%, seawater need, evaporated, leave, 100 g, weight, gram, salt, percentage, amount, multiply,

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Answer from: Quest

step-by-step explanation:

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Answer from: Quest

27 +27 or 27times 2=54

the diffrence is 0

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