The
amount of a substance can be converted into grams of that substance by using
the molar mass. It is a physical property of a substance which describes the
mass per mole of the substance. The molar mass of Zn is 65.38 g/ mol.
Multiplying the given amount of Zn with the molar mass will yield to the
mass of the substance.<span>
</span>
<span>1.0 x 10^-3</span><span> x 65.38 =</span><span> </span><span>0.0654 g Zn</span>
Answer:
7,881 g/L
Explanation:
Iron volume = 30.58 mL - 29.40 mL = 1.18 mL
1.18 mL / 1000 mL = 0.00118 L
Iron density = mass/volume
= 9.3g / 0.00118 L
= 7,881 g/L
Answer:
5 (five)
Explanation:
In , the number of valence electrons of phosphorus is five while that of each of the oxygen atom is six. The oxygen atoms form three single bonds and a single double bond with the phosphorus. Therefore, the number of covelent bonds around the compound in order to ensure that the dot structure can expand the octet to reduce the formal charge is 5 (five).
Answer: 78.69 g of Fe
Explanation: Iron(III) oxide is Fe2O3. It has a molar mass of 159.7 g/mole. That consists of:
2 x Fe at 55.85 = 11.69 or 69.94%
3 x O at 16.0 = 48.0 or 30.06%
Therefore 112.5 grams will contain (112.5 g)*(69.94%) = 78.69 g of Fe