Answer:first one: 3.0g second one: 10g H2O(I)
Explanation:
1. C : Mg(CN)2
2. B : N2O5
3. D : Ti(ClO4)3
4. A : Ni(NO3)3
5. D : Cobalt (III) Acetate
6. B : Nickel(II) sulfate
7. C : Dinitrogen Tetrafluoride
8. A : Phosphorus pentachloride<em />
9. C : Metallic <em>(<!> This is the only one I'm not 100% sure of)</em>
10. A : Ionic
11. C : Metallic
12. B : Covalent
Answer:
The correct answer is HCl
Explanation:
There is a dipole-dipole force in hydrochloric acid (HCl), this type of attraction occurs in polar covalent molecules. In this case, the positive end of the molecule (H) attracts the negative (Cl).
I believe the answer might be photosynthesis, but the question is kind of vague.
Ni(OH)₂(s) ⇄ Ni²⁺(aq) + 2OH⁻(aq)
Ksp=2.0*10⁻¹⁵
Ksp=[Ni²⁺][OH⁻]²
c=[Ni²⁺]=[OH⁻]/2
Ksp=c×(2c)²=4c³
c=∛(Ksp/4)
c=∛(2.0×10⁻¹⁵/4)=0.01995 mol/L ≈ 0.02 mol/l
