The first step to solve this problem is to multiply the volume of solution times its concentration to find the number of moles needed, remember that M=mol/L:

$0.500L\cdot\frac{0.475mol}{L}=0.2375mol$

Now, use the molar mass of sucrose to find the number of grams needed to make the solution. This is, multiply the number of moles needed times the molar mass:

$0.2375mol\cdot\frac{342g}{mol}=81.225g$

It means that to make 0.500L of a 0.475M you will have to weigh 81.225g of sucrose.

4 0

1 year ago

A 37.2-g sample of lead (Pb) pellets at 20Â°C is mixed with a 62.7-g sample of lead pellets at the same temperature. What are th

Vesnalui [34]

Answer:

Mass of sample is 99.9 g, density of ample is 11.35 $g/cm^{3}$ and temperature of sample is $20^{0}\textrm{C}$

Explanation:

Mass is an additive property. Therefore mass of combined sample is summation of masses of two pellets.

Mass of combined sample = (37.2+62.7) g = 99.9 g

Density is an intensive property. Therefore density of combined sample of lead will be same as with density of Pb.

Density of combined sample = 11.35 $g/cm^{3}$

Temperature is an intensive property. Therefore temperature of combined sample of lead will be same as with individual pellets.

temperature of combined sample = $20^{0}\textrm{C}$

8 0

2 years ago