Answer:

Explanation:
Hello,
In this case, given the mathematical definition of molar concentration as the moles of solute divided by the liters of solution:

We can easily compute it by firstly computing the moles of sugar by using its molar mass:

After that, we compute the concentration by realizing 259.8 mL equals 0.2598 L:

Or just:

Considering molar units as mol/L
Best regards.
Surplus cause the other ones aren’t in english
Answer: 2.52 M
Explanation:
The product of molarity (moles/litre) and volume in litres yields moles, and the numbers of moles in two solutions means dilute and concentrated are equal, which is expressed by the following equation:


Answer:
The answer is Bob
Explanation:
The science exist to kinds of measurements base units and derive units of measurement.
Base units are the ones that measure: length, mass, time, electric current, temperature, luminous intensity and amount of substance.
Derivative units of measurement are obtain when we combine the base units.
Know from your question
Bob measures length is a base unit
Jill measures density is a derivative unit, is the combination of mass and volumen
Kim measures mass is a base unit
Steve measures brightness is a base unit.
I know for number 4 the answer is c, sorry I can't help with the others.