The value of X for this chemical reaction is 1.65 x 10⁻⁴
<u>Explanation:</u>
Mg (OH)₂(s) <==> Mg²⁺+(aq) + 2OH₋₁(aq)
Kc= 1.80x10⁻¹¹
KC = [Mg²⁺][OH-]²
Let us assume
Put X = [Mg²⁺] and 2x =
[OH-]
1.80x10-11 = (X) (2X)²
1.80x10-11 = 4X³
X³ = 4.5x10⁻¹²
On simplifying the equation we get,
X = 1.65 x 10⁻⁴
The value of X for this chemical reaction is 1.65 x 10⁻⁴
Answer:
b. glass and charcoal
Explanation:
Step 1: Given data
- Density of Glass: 2.6 g/mL
- Density of charcoal: 0.57 g/mL
- Density of platinum: 21.4 g/mL
Step 2: Determine which material will float in molten lead
Density is an intrinsic property of matter. Less dense materials float in more dense materials. The materials whose density is lower than that of lead and will therefore float on it are glass and charcoal.
Answer:
1350 g
Explanation: just add a 0
Answer:
A) It must be negative
Explanation:
A spontaneous reaction in Chemistry is that which is proceeding in a particular direction without the intervention of any external effect. As a spontaneous reaction proceeds (which can be relatively slow), free energy ΔG, which is the available energy for work, is released.
Gibbs free energy, ΔG, is released during a spontaneous process and hence the ΔG is negative because the reactants have more free energy than the products, hence, no energy input is needed for the reaction to proceed forward but rather an energy output. This is what makes a negative ΔG depict a spontaneous reaction.
