Question

50 Points Help

1) Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL.

7) What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm3.

Answer 1

• Volume=250mL
• Density=0.8765g/mL

`\\ \sf\longmapsto Density=(Mass)/(Volume)`

`\\ \sf\longmapsto Mass=Density* volume`

`\\ \sf\longmapsto Mass=250(0.8765)`

`\\ \sf\longmapsto Mass=219.12g`

#2

• Mass=2500g
• Density=10.5g/cm^3

`\\ \sf\longmapsto Density=(Mass)/(Volume)`

`\\ \sf\longmapsto Volume=(Mass)/(Density)`

`\\ \sf\longmapsto Volume=(2500)/(10.5)`

`\\ \sf\longmapsto Volume=238.09cm^3`

Answer 2

1. Find mass of 250.0 ml of benzene : -

given data :

• density = 0.8765 g/ml

• volume = 250 ml

we know the relation between mass, volume and density

that is

`\boxed{ \boxed{density = (mass)/(volume) }}`

• 
  `0.8765 = (m)/(250)`

• 
  `m = 250 * 0.8765`

• 
  `m = 219.125 \: \: grams`

• 
  `\approx219.12 \: g`

7. Find volume of silver metal :

given data :

• mass = 2500.0 g

• density = 10.5 g/ cm³

Since we already know the relation, let's solve form volume :

• 
  `10.5 = (2500)/(v)`

• 
  `v = (2500)/(10.5)`

• 
  `v = 238.095 \: \: cm {}^(3)`

• 
  `\approx238.1 \: \: cm {}^(3)`