Answer:
1326.6 × 10⁻²³g
Explanation:
Given data:
Number of atoms of iron = 143 atoms
Average atomic mass of iron = 55.845 amu
Mass of iron = ?
Solution:
It is known that,
55.845 g of iron = one mole of iron = 6.02× 10²³ atoms
For 143 atoms:
143 atoms /6.02× 10²³ atoms × 55.845 g
23.754 × 10⁻²³× 55.845 g
1326.6 × 10⁻²³g
Correct Answer: Mixture will be heterogeneous
Reason:
The mixture is said to be homogenous, if it contains single phase, On other hand, heterogenous system has, multiple phases. When, oil and vinegar are mixed together, on standing, the two liquids separates out as different phases. Hence, the mixture will be refereed as heterogeneous.
Answer:
42 millions of single cells
If a compound is made from two non-metals it’s bonding will be covalent
The question doesn't really make any sense, you've just given us a balanced equation. The question seems to be a limiting reagent question, but we actually need to know how many mols of either ZnS or O2 you start off with, in order to tell us how much of the other remains.
