A 24.0 gram object has a volume of 6.0 mL. What is the density of the object?
2 answers:
Answer:
4 g/mL
Explanation:
The density of a object can be found using the following formula.
where m is the mass and v is the volume.
We know that the mass of the object is 24.0 grams and the volume is 6.0 milliliters.
Substitute the values into the formula.
Divide 24 g by 6 mL.
The density of the object is 4 grams per milliliter.
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Answer:
No
Explanation:
The mass fraction is defined as:
where:
- wi: mass fraction of the substance i
- mi: mass of the substance i
- mt: total mass of the system
<u><em>The mass fraction of two substances (A and B), will be the same, ONLY if the mass of the substance A (mA) is the same as the mass of the substance B (mB).</em></u>
An equimolar mixutre of O2 and N2 has the same amount of moles of oxygen and nitrogen, just to give an example let's say that the system has 1 mole of O2 and 1 mole of N2. Then using the molecuar weigth of each of them we can calculate the mass:
mA= 1 mole of O2 * 16 g/1mol = 16 g
mB=1 mole of N2 *28 g/1mol=28 g
As mA≠mB then the mass fractions are not equal, so the answear is NO.