Answer:
the first one which is A
Explanation:
the burning of fossil fuels causes both air pollution and water pollution
Explanation:
Formula to calculate the atomic packing factor is as follows.
APF = ![\frac{\text{volume of sphere}}{\text{volume of unit cell}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7Bvolume%20of%20sphere%7D%7D%7B%5Ctext%7Bvolume%20of%20unit%20cell%7D%7D)
= ![\frac{N \times V_{N}}{V_{C}}](https://tex.z-dn.net/?f=%5Cfrac%7BN%20%5Ctimes%20V_%7BN%7D%7D%7BV_%7BC%7D%7D)
It is given that atomic radius is 0.123 nm and density of metal is 7.45
.
Hence, number of atoms will be calculated as follows.
No. of atoms =
= 4
APF =
= 1.3905
Thus, we can conclude that atomic packing factor if the unit cell has a tetragonal symmetry is 1.3905.
Answer:
i think it's b if it's not don't blame me blame the anwser
Explanation:
The three types of consumers in the animal kingdom are carnivores, herbivores and omnivores. Carnivores eat only meat. Herbivores eat only plants, while omnivores need to consume both plants and meat to satisfy their dietary requirements.
Answer:
3 moles of CO are needed
Explanation:
Given data:
Number of moles of CO used = ?
Mass of Fe produced = 112 g
Solution:
Chemical equation:
Fe₂O₃ + 3CO → 2Fe + 3CO₂
Number of moles of Fe:
Number of moles = mass/ molar mass
Number of moles = 112 g/ 55.85 g/mol
Number of moles = 2.00 mol
Now we will compare the moles of iron and CO.
Fe : CO
2 : 3
Thus, 3 moles of CO are needed.