Density is mass per volume - mass/volume. So if you have 3g and 6ml you have 3/6 g/ml or 0.5 g/ml.
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Density is mass divided by volume. In this case, density would be 3g/6ml = 0.5 g/ml.
You need to know the volume: Mass = volume X density
The density of the object is calculated by dividing the mass by the volume. In this case, the density would be 0.2 g/mL.
The density of an object is calculated by dividing the mass by the volume. In this case, the density would be 3 g divided by 7 cm3, which equals approximately 0.43 g/cm3.
Note 5cm isn't a volume it is a length therefore for the answer we are assuming the volume is 5cm3 Density = mass/volume Density = 15g/5cm3 = 0.015kg/0.000005m3 Density = 3g/cm3 or in SI units 3,000kg/m3
To find the mass, you can use the formula: mass = density x volume. Given the density of 3 g/ml and the volume of 100 ml, you would calculate 3 g/ml x 100 ml = 300 grams. Thus, the mass of the substance is 300 grams.