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tia_tia [17]
3 years ago
15

Please help me please

Biology
1 answer:
mars1129 [50]3 years ago
6 0

Answer:

There's not enough information to answer this. You need to provide the information on the people.

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If 240 mL of water is added to 13 mL of 5.0 M NaCl solution,
zavuch27 [327]

Answer:

The correct answer is 0.26 M

Explanation:

The initial concentration of NaCl solution (Ci) is 5.0 M. The initial volume of the solution (Vi) is 13 mL. The final volume is the addition of 240 mL to 13 mL (Vf= 13 mL + 240 mL= 253 mL).

In order to calculate the final concentration of the solution (Cf) we can use the following expression:

Ci x Vi= Cf x Vf

This mathematical expression is often used to calculate concentrations in dilution procedures. So, we introduce Ci, Vi an Vf in the expression and we calculate Cf:

Cf= (Ci x Vi)/Vf= (5.0 M x 13 mL)/253 mL= 0.257 M ≅ 0.26 M

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the sun is almost 390 times farther away from the Earth than is the moon, its high mass still affects the tides. Because the Earth’s surface is not uniform , tides do not follow the same patterns in all places.

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