Answer:
0.00714 g
Explanation:
We know that the volume of one mole of a substance is 22400 cm^3
Thus;
1 mole of sulphur occupies 22400 cm^3
x moles of sulphur occupies 5.0 cm3
x = 5.0 cm3 * 1 mole/22400 cm^3
x = 2.23 * 10^-4 moles
Molar mass of sulphur = 32 g/mol
Mass of sulphur = 2.23 * 10^-4 moles * 32 g/mol
Mass of sulphur = 0.00714 g
Answer:
Cr(s) ⟶ Cr⁴⁺(aq) + 4e⁻
Explanation:
1. Write the skeleton half-reaction
Cr(s) ⟶ Cr⁴⁺(aq)
2. Balance charge
Add electrons to the side that needs them.
You have 4+ on the right and 0 on the left. You must add 4e⁻ to the right to balance the charge.
Cr(s) ⟶ Cr⁴⁺(aq) + 4e⁻
For soda their will be a chemical reaction the same as mentors and diet coke. In vinegar their will be no reaction...just smell funny for lemon juice their will be no reaction and the same with milk, it only reacts with coke because the chemicals inside of it also because it is fizzy and not still
Answer:
Li2S>Na2S>K2S>Rb2S>Cs2S
Explanation:
Lattice Energy is a type of potential energy which may be defined in as, energy that is required to break apart an ionic solid and convert its component atoms into gaseous ions. More technically, it is a measure of the energy contained in the crystal lattice of a compound, equal to the energy that would be released if the component ions were brought together from infinity.
Lattice energy of ionic compounds decreases with increasing ionic sizes. Since the anion is the same, we consider increase in cation sizes. We discover that for gtoi 1 cations; Li+<Na+<K+<Rb+<Cs+. The ionic lattice energy decreases in the reverse order. Li2S will show the largest lattice energy since it contains the smallest cation in the list.