Which of the following statements is true? a. Ag(s) reacts spontaneously with 1 M H+(aq). b. Ag(s) reacts spontaneously with Ni2+. c. Ag(s) reacts spontaneously with 1 M NO3– in 1 M H+(aq). d. Ni2+ reacts spontaneously with 1 M H+(aq) to form H2. e. Ni2+ reacts spontaneously with H2(g).
Answers
Answer:
Correct answer is a. Ag(s) reacts spontaneously with 1M H+(aq).
Explanation:
A charasteristic of metals is that they lose easily electrons, cations tends to gain electrons to react and anions tends to lose or share electrons to react.
If you want to make a chemical reaction you must to mix a reagent that tends to lose electrons with other that tends to gain them.
In the statement (a) we have a metal that loses electrons and a cation that can obtain them, so is the right answer.
note that the other optios have :
b) Metal with metal cation, not react beacause left a medium of reaction.
c) Both loses electrons
d) Both tends to gain electrons.
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Half equation reaction for 2KI+Cl2-I2+2KCl
Answers
Answer:
The correct statement is that the concentration of the acid in the solution will increase.
Explanation:
On the basis of the given question, if one dissolves 10 milliliters of acid in a beaker of water, the acid will get diluted. As the number of moles of acid is not going to change, thus, one can use the formula:
M1V1 = M2V2
Here, M is the concentration of the acid in the solution,
V1 = 10 ml
V2 = V water + 10
If we supplement, an other 5 ml of acid, the new concentration of the acid will be:
M = M1 (5 ml) + M2 (Vwater + 10 ml) / (5 ml + V water + 10 ml)
Therefore, the concentration of the acid in the new solution will increase.
Answer:
the concentration of acid in the solution has been increased.
Explanation:
the answer is C on edge.
bacterial
immunity
specialized
Answers
the answer is SPECIALIZED
∑
b.As reactants form products, the potential energy increases.
c.Thermal energy is transferred from the product to the reacting substances.
d.Thermal energy is transferred from the surroundings to the reacting substances.
Answers
Answer:
As reactants form products, the potential energy decreases.
Explanation:
Edge
The temperature of the balloon will decrease.
The gas atoms will strike the sides of the balloon more often.
The gas inside the balloon will change into a liquid.
Answers
Answer: The gas atoms will strike the sides of the balloon more often.
Explanation:
Kinetic energy is the energy possessed by an object by virtue of its motion.
Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:
K= kinetic energy
R= gas constant
T= temperature
From above, it is visible that kinetic energy is directly related to the temperature of the system.
So if average kinetic energy of the system increases , the speed of the molecules will be more and hence the gas atoms will strike the sides of the balloon more often.
Hope I helped!
b. are one of the major symptoms of depression
c. usually also lead to panic attacks
d. should be ignored even when they last a long period of time
Answers
A) Sadness can occur within anybody, not just a symptom of depression. This option is out of the question, since it is wrong.
B) Feelings of sadness are usually linked to depression when felt over a long period of time. Studies say that sadness is only a little part of depression, while you mostly feel rejected, hopeless, and worthless. Looking at the other options, this would be the most reasonable answer.
C) This CAN be true in some ways, but panic attacks can be triggered by so many things. The #1 reason is usually when you're nervous or anxious. Panic attacks can even happen out of the blue. Sadness can lead to panic attacks, but not usually. I would say no for this option.
D) Sadness should NOT be ignored when they last over a long period of time. If you are sad for a certain time period, you should look into talking to somebody about the issue. This option is obviously false.
Out of the choices, two out of four were reasonable, but I would have to go with B) are one of the major symptoms of depression.
fusion
chemical
ionic
Answers
Answer: The correct answer is fusion reaction.
Explanation:
Nuclear fission reaction is defined as the reaction in which a heavier nuclei dissociates into two or more lighter nuclei.
Nuclear fusion reaction is defined as the reaction in which lighter nuclei combines to form a heavier nuclei.
Chemical reaction is defined as the reaction in which change in composition takes place. A new substance gets formed in this type of reaction.
The chemical equation for the formation of helium-4 atom follows:
In the above reaction, two hydrogen nuclei are combining together to form a heavier nuclei which is helium atom.
Thus, the correct answer is fusion reaction.