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4vir4ik [10]
3 years ago
7

Which of the following examples includes only chemical changes that occur in

Chemistry
1 answer:
Paul [167]3 years ago
6 0
I don’t think you can get it for
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Arrange the following ions in order of increasing ionic radius.
Zepler [3.9K]

Answer:

Ca 2+ <K  +  <Ar<Cl  −  <S  2−

Explanation:

Ar,K  + ,Cl  − ,S  2− ,Ca  2+

 have the same number of electrons. Their radii would be different because of their different nuclear charges. The cation with the greater positive charge will have a smaller radius because of the greater attraction of the electrons to the nucleus. Anion with the greater negative charge will have the larger radius. In this case, the net repulsion of the electrons will outweigh the nuclear charge and the ion will expand in size. Hence the correct order will be Ca  

2+  <K +  <Ar<Cl  −  <S  2−

 

3 0
2 years ago
Suggest two observations that would be made when rubidium is added to cold water.
tino4ka555 [31]

Answer:

1. Rubidium metal reacts very rapidly with water to form a colorless basic solution of rubidium hydroxide (RbOH) and hydrogen gas (H2).

2. Rubidium sinks because it is less dense than water. It reacts violently and immediately, with everything leaving the container. Rubidium hydroxide solution and hydrogen are formed.

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2 years ago
A sample of helium gas is in a sealed rigid container. What occurs as the temperature of the sample is increased
hammer [34]
The electrons will move more rapidly resulting in a higher pressure even at a consistent volume
3 0
3 years ago
HELP PLZZZZZZZZZZZZZ I WILL GIVE BRAINLIST!!!!!!!!!!!
Phantasy [73]

Answer:

c the pressure increases

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Baseball has more chances




Pls mark as brainliest
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