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alekssr [168]
3 years ago
15

Evidence shows that interstellar bodies are moving away from Earth, some faster than others, which BEST suggests that the univer

se
A) is shrinking.
B) is expanding.
C) was not formed by a big bang.
D) has always been the same size.


Our Solar System is in the Milky Way galaxy. What shape is this galaxy?
A) oval
B) rectangular
C) spiral
D) triangular


Our solar system lies in
A) the central ring of the Milky Way.
B) one of the spiral arms of the Milky Way.
Eliminate
C) in the galactic center of the Milky Way.
D) outside the spiral arms of the Milky Way.
Chemistry
2 answers:
Tomtit [17]3 years ago
8 0
1. B it's expanding.
2. c Our galaxy, the milky way is a spiral galaxy. you can by looking at it's spiral shape.
3. b We are in one of the Milky way's spiral "arms".
madam [21]3 years ago
6 0
B the answer...........

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13. Would you expect oxygen to form a cation or anion? How many electrons would it gain or lose? Why?
netineya [11]

Answer: C)Anion, it would gain 2 electrons to satisfy the octet rule.

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration of oxygen with 8 electrons is

O:8:1s^22s^22p^4

The cation is formed by loss of electrons and anions are formed by gain of electrons.  

In order to complete its octet and get stable, it gains 2 electrons and thus would form an anion.

O^{2-}:10:1s^22s^22p^6

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lisov135 [29]
<span>Decomposition reaction.</span>
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9966 [12]

Answer:

im not sure but I hope this helps

Explanation:

I believe the equivalents is just the moles reactant/moles limiting reactant

water has a denisty of 1 g/mL. 1 L is 1000 ml so there are 1000g/L.

the molar mass of water is 18g/mol if you use the Liters in the equation above you can find the number of grams present. divide this number you found by 18 to find the moles.

now take the amount of the other reactant given and divide it by its own molar mass. this will give you the number of moles of that reactant.

divide the moles of water by the moles of the reactant and that is the equivalent.

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