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3 years ago

MATHS

SAT

2 answers:

Flura [38]3 years ago

6 0

Answer:

D. 275

Explanation:

3 + 11 = 14

350 ÷ 14 = 25

25 × 3 = 75

350 - 75 = 275

Answer = 275

Mashcka [7]3 years ago

3 0

Answer:

Well you can add the ratio

since its pop to rock

3:11

3+11=14

350/14=25

now you jsut multiply that to each ratio

3*25=75

11*25= 275

So (d) 275 rock songs

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<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity=\frac{number of moles}{volume}$

Molarity is expressed in units $\frac{moles}{liters}$ .

<h3>Concentration of CH₃OH</h3>

In this case, you know:

number of moles= 50 g× $\frac{1 mole}{32.04 g}$ = 1.56 moles, being 32.04 $\frac{g}{mole}$ the molar mass of CH₃OH
volume= 500 mL= 0.5 L (being 1000 mL= 1 L)