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Olenka [21]
4 years ago
6

2. How does a particles energy change as it changes state?

Chemistry
1 answer:
Iteru [2.4K]4 years ago
6 0
When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop.
In chemistry, a pure substance is a sample of matter with both definite and constant composition and distinct chemical properties. To avoid confusion, a pure substance is often referred to as a "chemical substance."
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Primaries, the secret ballot, and the use of
algol [13]
(4) Increase citizen participation in government

Primary: a way for citizens to vote for new government officials, not too influenced by party leaders
Secret Ballot: keeping a voter's votes private from others
Recall: a way for citizens to remove a government official from office
Referendum: a way for citizens to vote for or against something proposed by the legislature

During the Progressive Era, many local governments were lead by corrupt political machines. They would rig elections in their favor as well as threaten those who voted against them. Many would appoint their supporters who weren't usually qualified to government positions as incentive to vote for them (I don't know if you care but that's called the spoils system).

<span>It's not (1) because the whole point of primaries, secret ballots, recalls, and referendums was so political machines were not dominating
</span>It's not (2) because none of this has a lot to do with Native Americans
It's not (3) because the political machines were a <u>local</u> government problem, not federal
It <u><em></em>IS</u> (4) because by getting more people involved in the government, they can elect qualified officials, vote on laws that best benefit the people, and minimize corruption.
8 0
4 years ago
The emission of a Beta particle has the effect of...? A. Decreasing mass by one unit /B.Increasing mass by one unit / C. - No ch
vodomira [7]
The emission of a beta particle has the effect of : C. No change in mass

basically, beta particle has a very very little mass compared to the proton and  neutrons, so  little to the point that it never considered as a change in mass. But it does decreases the charge of atom

hope this helps

3 0
3 years ago
Read 2 more answers
8. At higher temperatures _______.
DanielleElmas [232]

Answer:

B. particles in an object move faster

Explanation:

At higher temperatures, particles in an object moves faster.

Temperature is the degree of hotness or coldness of a body.

  • At higher temperature, the substance is very hot.
  • Temperature is related to the heat energy content of a body
  • As the temperature increases, the average kinetic energy of the particles of system increases more and more.
  • This is in compliance with the kinetic molecular theory of matter.
  • Therefore, at higher temperatures, particles in an object move faster.
8 0
3 years ago
Calculate the value of q (kj) in this exothermic reaction when 5.40 g of hydrogen peroxide decomposes at constant pressure?
Gelneren [198K]
Hydrogen peroxide decomposes to yield water and oxygen gas 
That is; H2O2 (l) = H2O (l) + O2(g)
The standard heat of formation; H2O2 (l) = -187.6 kJ/mol; H2O(l) = -285.8 kJ/mol
1 mole of hydrogen peroxide contains 34 g
Thus, 5.4 g contains 5.4/34 = 0.1588 moles 
The moles of water produced will also be equivalent to 0.1588 moles 
Heat = heat of formation of product - reactant
Therefore; Heat = (0.1588 moles × -285,8 )- (0.1588× -187.6)
                           =  -15.594 kJ
6 0
3 years ago
Covalent bonds are formed when valence electrons are
mamaluj [8]
It’s b. Shared between two atoms.
5 0
3 years ago
Read 2 more answers
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