Two chemistry density problems?

T

Taylor

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Need help with these.

Calcium chloride has a density of 2.50 g/mL. What is the volume of 748 mg of this substance?

What is the density of a piece of cement that has a mass of 8.76 x 10^3 lg and a volume of 2.71 cm^3?
 
density = mass / volume

So 2,50g/ml of calcium chloride makes for 748mg = 0,748g
0,748g / 2.5g/ml = 0,2992 ml

And for the cement it is the same

8,76x10^3 g and it is 2,71 cm^3 big.
So per cm^3 that is 8,76/2.71 = 3.23 g/cm^3
 
density = mass / volume

So 2,50g/ml of calcium chloride makes for 748mg = 0,748g
0,748g / 2.5g/ml = 0,2992 ml

And for the cement it is the same

8,76x10^3 g and it is 2,71 cm^3 big.
So per cm^3 that is 8,76/2.71 = 3.23 g/cm^3
 
748mg x (1g / 1000mg) x (1 mL / 2.50g) = ____ mL

what is lg? do you mean mg? the equation is....density = mass / volume
8.76x10^3 mg x (1g / 1000mg) / 2.71cm^3 = 3.23g / cm^3
 
density = mass / volume

So 2,50g/ml of calcium chloride makes for 748mg = 0,748g
0,748g / 2.5g/ml = 0,2992 ml

And for the cement it is the same

8,76x10^3 g and it is 2,71 cm^3 big.
So per cm^3 that is 8,76/2.71 = 3.23 g/cm^3
 
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