Are you referring to DNA?
Answer:
+2
Explanation:
Nickel (II) oxide, or NiO, is an ionic compound. Recalling a few rules of determining the oxidation number of substances:
1. Oxidation numbers of elements in ionic compounds are usually their own ionic charge
2. The total oxidation number of a neutral compound should be 0
And,
3. The oxidation number of oxygen in most cases is -2.
Therefore, since O in NiO has a oxidation number of -2, and nickel (II) ion usually has a charge of 2+, the oxidation number of Ni in NiO is +2 (always remember to put the positive sign in front of the number)
Answer:d the surface of the road will break and cracks will appear in the ground :)
Explanation:
Answer:
Compound A: Propylbenzene
Compound B: Cumene
Explanation:
On this case, we have two clues:
<u>1) The mass spectrometry info</u>
<u>2) The formation of benzoic acid</u>
If we have the formation of benzoic acid with a strong oxidant (
). It means that we have an <u>alky group bonded to benzene</u>. Therefore we have to <u>add three carbons to a benzene</u> ring in order to obtain the mass of the compound (120).
The next question is <u>how these three additional carbons are bonded</u> to the benzene. For this, we have to check the mass info. For compound A we have a <u>fragmentation moeity on 91</u> therefore we have a <u>loss of an ethyl group</u>. Therefore compound A have a <u>linear structure</u> for the aditional three carbons.
For compound B we have a <u>fragmentation moeity on 105</u> this means a loss of 15 units of mass therefore we <u>loss a methyl grou</u>p. This indicates that we have a <u>non linear structure</u> fo the three additional carbons.
See figures 1 and 2.
I hope it helps!