The stirring breaks it up faster, the amount of water doesn’t effect it, it just gives it space to spread/dissolve - I think.
Answer:
D
Explanation:
Recall that entropy measures the number of microstates in a substance, which is highest in gases, followed by liquids and solids. Hence, entropy increases if the products have more gaseous molecules than the reactants.
- In reaction one, chlorine gas is converted into solid NaCl, so entropy decreaes.
- In reaction two, four moles of gas are converted into two moles of gas, so entropy decreases.
- In reaction three, ice is melted to form water, which has higher entropy. Thus, entropy increases.
- In reaction four, a liquid is freezed into its solid phase, leading to a decrease in entropy.
- In reaction five, oxygen gas is converted into solid MgO, so entropy decreases.
In conclusion, the answer is D.
Answer:
The sample will dissolve in more than 1 minute.
Explanation:
In order to answer this question, we have to consider several significant aspects:
- temperature is directly proportional to kinetic energy, that is, the greater the temperature, the greater the kinetic energy. Since kinetic energy measures velocity of the particles, this means that the greater the temperature, the greater the velocity of the individual ions of potassium phosphate;
- we may conclude from the first fact that the number of collisions in a given amount of time will then increase due to an increase in velocity;
- it also follows that the greater the temperature, the faster our salt dissolves due to an increase in the number of successful collisions.
This means that at a lower temperature, the sample will dissolve in a longer period of time.
Answer:
Explanation:
Here are the ones I'm certain of.
10, Transfer of electrons occurs in NaCl. That's another way of saying that the bond is ionic.
12. What is a polar molecule. The two hydrogens are + and the Oxygen is minus.
9. Contains just one sigma bond. H2 is made up of only 1 bond type. I'd pick this, but It's not certain.
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The one I'm uncertain of is 11. I'd pick E but it is a pure guess. The only other choice is CO2 but I don't think CO2 is that way. You'll have to enter the answers to find out which is which.
Answer:
[H]=10^-4 when ph=4 higher
[H]=10^-5 when ph =5 lower
Explanation:
brains
