A student blows up a balloon, seals it tightly, and places it in a very cold freezer. After a few hours, the balloon has gotten smaller. Which of the following statements best explains the decrease in the balloon’s volume? the multiple choice
a. As the temperature decreases, the molecules gain energy and move closer together, causing the balloon to shrink.
b.As the balloon releases energy, the molecules break apart into atoms, causing the balloon to shrink.
c.As the temperature decreases, the molecules lose energy and move closer together, causing the balloon to shrink.
d.As the balloon absorbs energy, the molecules move more quickly, causing the balloon to shrink.
Answers
Related Questions
1. How did Dmitri Mendeleev deal with elements that had not yet been discovered?A. He left blanks for them in his periodic table, as he predicted they would be discovered. B. He gave them names and properties and placed them in the table. C. He created them in his laboratory and placed them in the table. D. He ignored them, placing them in the table and shifting others when they were discovered. 2. Which of the following elements have properties similar to those of astatine (At)? A. F, Br, I B. Ar, S, P C. F, Ar, Ne D. Na, Mg, Al 3.What is true of the ionic size of the elements in a group as one moves from top to bottom in that group? A. Ionic size stays the same within the group. B. Ionic size does not vary in any predictable way within the group. C. Ionic size decreases from top to bottom within the group. D. Ionic size increases from top to bottom within the group.
Why would an electrician use parallel circuits to wire the lights in each room of a house instead of using a series circuit?A. When electricians get their license, they are only licensed to install parallel circuits. Most electricians aren't certified to install series circuits. B. Parallel circuits prevent electrons from flowing if part of the circuit is broken and therefore prevent fires. Series circuits cause more fires because electrons still flow. C. Electrons continue to flow in a parallel circuit even if part of the circuit is broken. In a series circuit, a break such as a burned out lightbulb would cause the current to stop in the whole room. D. Parallel circuits are much easier to wire and are required by the electrical code for housing construction in most communities. Series circuits are sometimes used with special approval.
Which fraction of a Sr-20 sample remains unchanged after 87.3 years?
Boyle's law states that thea. volume of a gas varies inversely with pressure. b. volume of a gas varies directly with pressure. c. temperature of a gas varies inversely with pressure. d. temperature of a gas varies directly with pressure.
transporting the glucose made during photosynthesis to the roots and
stems.
Phloem
Xylem } Vascular
stem
τρος
Xylem
Phloem
Which function is xylem specifically adapted to perform in plants?
(7.12A)
A
It helps prevent wer loss
B
It transports water from the roots to the leaves
с
It exchanges gases with the atmosphere
D
It captures sunlight for photosynthesis
Answers
Answer:
B
Explanation:
it transports water from roots to the leafs
Answers
- e.g. CaCO3 isn't very soluble, do it can't dissolve and dissociate. If it can't pop apart, no ions.
2. Swap the partners for all the other ions that you can get from step 1. You can skip pairings with the same charge - a + can't get close to another + to react.
3. Use solubility, acid/base, and redox rules to see if anything will happen with the ions in solution.
(2) CH3CH2CH3
(3) CH3CH3
(4) CH4
Answers
Answer: The correct answer is option (1).
Explanation:
The general formula of alkanes (Saturated compounds) is given as:
The general formula of alkene (Unsaturated compounds)is given as:
The general formula of alkynes (Unsaturated compounds)is given as:
1. unsaturated hydrocarbon
2. Saturated hydrocarbon
3. Saturate hydrocarbon
4. Saturated hydrocarbon
Answers
Answer:
answering what???
Explanation:
Answer:
I answered
Explanation:
B. Soda mixed with the pizza sauce and sped up digestive enzyme activity.
C. Soda raised the pH in his stomach and sped up digestive enzyme activity.
D. Soda lowered the pH in his stomach and slowed digestive enzyme activity.
2. Which factor decreases the rate of a chemical reaction?
A. An inhibitor
B. A co-factor
C. Increased substrate
D. Cold temperature
3. Which component decreases the activation energy of a chemical reaction?
A. An inhibitor solution
B. Presence of an enzyme
C. Lower substrate concentration
D. Neutral pH levels
4. A biologist adds a vitamin solution to an enzyme/substrate solution that requires co-factors. What will happen to the substrate?
A. The vitamins will bond to the enzymes and increase their reactivity with the substrates.
B. The vitamins will bond to the enzymes and decrease their reactivity with the substrates.
C. The substrate molecules will bond to the vitamin molecules and inhibit bonding of the enzyme.
D. The substrate molecules will bond to the vitamin molecules and stimulate bonding of the enzyme.
5. Jennifer stews peaches to make peach jelly. She believes the homemade jelly will make a healthy treat full of vitamins and enzymes her body needs. Which of the following disproves her prediction?
A. The peaches don't contain enzymes.
B. The jelly has too much sugar to be healthy.
C. The enzymes in the peaches have denatured.
D. The vitamins in the peaches will inhibit the enzymes.
6. What statement best describes what happens during the catalytic cycle?
A. The enzyme breaks the substrate apart to prepare for the reaction.
B. The enzyme positions the substrate to increase access during a reaction.
C. The substrate uses enzyme energy to start the reaction.
D. The active site releases the substrate and replaces it with an inhibitor.
Answers
Answer 1) Option D) Soda lowered the pH in his stomach and slowed digestive enzyme activity.
Explanation : Consuming soda after eating pizza lowered the pH of the stomach which consequently, slowed the digestive enzyme activity in the stomach. The enzymes actively digest the food only in highly acidic environment.
Answer 2) Option A) An inhibitor
Explanation : An inhibitor is a substance usually added to a progressing chemical reaction to decrease the rate of reaction and finally stop the reaction.
Answer 3) Option B) Presence of an enzyme
Explanation : When an enzyme is added to a chemical reaction it is often seen that it lowers the energy of activation and catalyzes the reaction. So, enzyme acts as a catalyst and increases the reaction rate.
Answer 4) Option A) The vitamins will bond to the enzymes and increase their reactivity with the substrates.
Explanation : When the biologists adds a vitamin solution to an enzyme or a substrate solution the bonding will take place between vitamins and enzymes and as a result it will increase the reactivity of the substrates.
Answer 5) Option C) The enzymes in the peaches have denatured.
Explanation : When enzymes are stewed or rather boiled they become denatured and the bonds between them breaks, which makes the enzyme useless. Hence, proteins should be eaten raw without boiling at higher temperatures.
Answer 6) Option A) The enzyme breaks the substrate apart to prepare for the reaction.
Explanation : In a catalytic reaction the enzymes usually break the substrate and create more surface area for the reaction to occur.
2) A
3) B
4) A
5) C
6) A
(2) double covalent bond that has 4 shared electrons
(3) triple covalent bond that has 6 shared electrons
(4) triple covalent bond that has 4 shared electrons
Answers
Answer: Option (2) is the correct answer.
Explanation:
An alkene is a molecule that contains a hydrocarbon chain with atleast one double bond.
For example, is a 1-butene molecule and it contains one double bond that consists of four shared electrons.
On the other hand, a molecule of hydrocabon that contains a triple bond is known as an alkyne. Whereas a hydrocarbon that contains only single bonds is known as an alkane.
Thus, we can conclude that the multiple covalent bond in a molecule of 1-butene is a double covalent bond that has 4 shared electrons.