Question

An object has a density of 6.0 g/ml. If the volume of the object is 24 ml, what is its mass?

Answer 1

Answer: The mass is: "140 g " .

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Step-by-step explanation:

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Given: 6.0 g/ mL ; (the "density");

and the volume of the object: "24 mL" ;

We shall find the "mass" (measured in "g" ["grams"] :

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`(6.0 g)/(mL) *(24 mL)/(1) = ? g` ;

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We can cancel out the "mL" units;

Since: "mL/mL" = 1 .

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and we have: " [6.0 * 24] g " ;

= 144 g ;

Now; since both given values in the problem have 2 (two) significant figures; and no "exact values" were given/used in this calculation;

we shall round our obtained calculation to: 2 (two) significant figures:

" 144 g" ; has 3 (three) significant figures ;

The first two significant figures are "14 ; and the following significant digit is "4" ; which is "less than 5" ; i.e, is either: "0, 1, 2, 3, or 4" ; so we round it down to "140" . {Note: If it were: 5, 6, 7, 8, or 9 ; then we would round the value up to "150".}.

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So: The mass is: "140 g " .

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Hope this helps! Wishing you the best!

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Answer 2

Mass of object is 144g

Step-by-step explanation:

Given the following data;

Mass of object =?

Volume of object = 24mL

Density = 6.0g/mL

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

`Density = (mass)/(volume)`

Hence, Mass = density × volume

Mass = 6 × 24

Mass = 144g

Therefore, mass of the object is 144g.