Answer:
Mass= 314.96 grams
Explanation:
The density of the substance is defined as mass per unit volume of it.
The formula is :
[tex]density=\frac{mass}{Volume}[/tex]
Unit conversion:
1 liter = 1000 ml
[tex]1dm^{3}=1Liter[/tex]
So
[tex]1dm^{3}=1000ml[/tex]....(1)
[tex]1dm^{3} = (10cm)^{3}[/tex]
[tex]1dm^{3}=1000cm^{3}[/tex]
Replace The dm3 by cm3 in (1)
[tex]1000cm^{3}=1000mL[/tex]
[tex]1cm^{3}=1mL[/tex]
Volume = 254 mL = 254 cm3
Calculation of mass
[tex]density=\frac{mass}{Volume}[/tex]
[tex]1.24=\frac{mass}{254cm^{3}}[/tex]
[tex]mass=1.24\times 254[/tex]
Mass= 314.96 grams(or 315 grams)
Note: Always makes same units before solving the question. You can not determine the mass if Volume is in mL and Density is in g/cm3. Change mL into cm3 first
