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Yuki888 [10]
3 years ago
14

What does the subscript tell you?

Chemistry
2 answers:
amm18123 years ago
7 0
I think it is d it is definitely not a or b
Inga [223]3 years ago
5 0
Im pretty sure its d
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Which ONE of the following is an oxidation–reduction reaction? A) PbCO3(s) + 2 HNO3(aq) ––––> Pb(NO3)2(aq) + CO2(g) + H2O(l)
sveta [45]

Answer:

E) C₂H₄(g) + H₂(g) ⇒ C₂H₆(g)

Explanation:

Which ONE of the following is an oxidation–reduction reaction?

A) PbCO₃(s) + 2 HNO₃(aq) ⇒ Pb(NO₃)₂(aq) + CO₂(g) + H₂O(l). NO. All the elements keep the same oxidation numbers.

B) Na₂O(s) + H₂O(l) ⇒ 2 NaOH(aq). NO. All the elements keep the same oxidation numbers.

C) SO₃(g) + H₂O(l) ⇒ H₂SO₄(aq). NO. All the elements keep the same oxidation numbers.

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E) C₂H₄(g) + H₂(g) ⇒ C₂H₆(g). YES. <u>C is reduced</u> and <u>H is oxidized</u>.

8 0
3 years ago
Chose the mathematical formula expressing work.
Gelneren [198K]
W = AB x F x Cos < AB, F
or just W= AB x F for short
7 0
3 years ago
What is another name for groups of elements?
jeka94
They are called groups or family. Hope this helps 
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3 years ago
Which sentence describes all atoms of one element?
allsm [11]

Answer:

4. they have the same number of protons

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4 0
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Wood and a cement block are considered to be transparent and are good conductors of electricity.
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Answer:

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3 0
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