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statuscvo [17]
3 years ago
8

USE LETTERS FOR ANSWERS, NO NEED TO EXPLAIN

Chemistry
1 answer:
Deffense [45]3 years ago
6 0

Answer:

Ok:

Explanation:

6a) Hg + Zn(NO_3)_2\\

b) NR

c) Hg_{(l)} + Zn(NO_3)_2 {(aq)}=> NR

d) Welp, no reaction so i don't know.

7a) KI + Pb(NO_3)_2

b) PbI_2 + KNO_3

c) All are aqeuous except for PbI2 which is solid

d) 2KI _{(aq)}+ Pb(NO_3)_2_{(aq)} => PbI_2_{(s)} + 2KNO_3_{(aq)}

Check if that is ok or if my work has any issues :).

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The table compares some characteristics of two atoms.
Mademuasel [1]

Answer:

Explanation:

Atom X,

Neutron num = 4, Mass num = 7

Therefore, proton number = Mass num - Neutron num

                                           = 7 - 4

                                           = 3

Atom Y,

Neutron num = 5, Mass num = 9

Therefore, proton number = Mass num - Neutron num

                                           = 9 - 5

                                           = 4

1) False. Atom X belongs to group 3 while atom Y belongs to group 4

2) False. Atom X is in a column on the left of Atom Y

3) True. Atom X and atom Y belong to the same period two on the periodic table

4) Fasle. Atom X and Y are not isotopes because they do not have the same atomic number.

Isotopy is a phenomenon whereby atom of same element have same atomic number but different mass number

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3 years ago
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BigorU [14]

Answer:

4th line

Explanation:

-water cycle helps regulate the temperature on the Earth.

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