Respuesta :

Medunno13

Answer: 19 grams

Explanation:

percent by mass = (mass of part)/(mass of whole) * 100

this means that in this question, 12 = x/160 * 100, where x is the amount of NaCl.

this means 12/100 = x/160, and thus x = (160)(12/100)=19.2 grams

The closest option is B.

Answer:

Second Option: 19 grams

Explanation:

Total solution weight: 160 grams

percent of NaCl in the solution: 12%

You take these two numbers and multiply them with 12 being over 100:

160 * [tex]\frac{12}{100}[/tex] = 19.2 grams

and then just round to the nearest whole number: 19 grams

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