In order to solve this problem you need to consider the states of matter and the amount of products.
If there are more products than reactants than there is an increase in entropy.
States of matter: increasing the motion of particles increases entropy.
Molecular movement:
Solid<Liquid<Gas
Changing states of matter from left to right would be an increase in entropy.
Changing states of matter from right to left would be a decrease in entropy
The answer is number 3
Answer:
1. a)
2. a)
3. b)
4. d)
Explanation:
The disposal method is how we throw away the wastes. In a chemical lab, the correct disposal method guarantees the security of the environment and the humans and animals that may be in contact with the materials.
So:
1. Excess chemical: Because it can be toxic, it may be disposed of in the appropriate waste container, which will depend on the characteristics of the material;
2. Reaction mixture: As the excess chemical, it can be toxic, so it must be disposed of at an appropriate waste container;
3. Used filter paper: Generally, the solids in the filter paper is not toxic, so it can be thrown away in the trash can;
4. Cracked or chipped beaker: Because the beaker is made of glass, it can cut when broken, so it must go to a broken glass box, that will protect the people that will deal with it.
Answer:
Mg(s) + Pb(NO3)2 (aq) → Mg(NO3)2 (aq) + Pb(s)
Explanation:
Answer:
You will find the mass of the pan and water but if the water got to its boiling temperature that mass may be a little bit off seeing as some of it may have evaporated
Answer:
47
Explanation:
Let's consider the following reaction at equilibrium.
H₂(g) + I₂(g) ⇌ 2 HI(g)
The concentration equilibrium constant (Kc) is the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.
Kc = [HI]² / [H₂] × [I₂]
Kc = (1.6)² / 0.14 × 0.39
Kc = 47
