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STALIN [3.7K]
2 years ago
8

Which change would best aid a farmer in making the transition from conventional farming techniques to more sustainable farming t

echniques?
irrigate crops using well water

reduce the ratio of essential elements in the fertilizer

plant only genetically modified crops

rotate the types of crops grown
Chemistry
1 answer:
grin007 [14]2 years ago
7 0

Answer:

Rotate the types of drops grown

Explanation:

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Rank the ions in each set in order of decreasing size, and explain your ranking:
Valentin [98]

Answer:

a) Se²⁻> S²⁻ > O²

b) Te²⁻ > I- >Cs+

c)  Cs+ > Ba²⁺ > Sr²⁺

Explanation:

(a) Se²⁻, S²⁻, O²⁻

In general, ionic radius decreases with increasing positive charge.

As the charge on the ion becomes more positive, there are fewer electrons.

The ion has a smaller radius. In general, ionic radius increases with increasing negative charge.

For ions of the same charge (e.g. in the same group) the size increases as we go down a group in the periodic table

Se²⁻> S²⁻ > O²

(b) Te²⁻, Cs⁺, I⁻

Te²⁻ > I- >Cs+

Te2- hast the biggest size, because of the double negative charge.

Cs+ has the smallest size since it has the most positive charge, compared to Te2- and I-.

(c) Sr²⁺, Ba²⁺, Cs⁺

Cs+ > Ba²⁺ > Sr²⁺

Cs+ has the biggest size, because its more downward (compared to Sr2+) and more to the left (compared) ot Ba2+.

Sr2+ has the smallest size because it's more upwords (compared to Cs+ and Ba2+)

5 0
3 years ago
Calculate the ph of a solution in which [oh–] = 4.5 × 10–9m.
frosja888 [35]

pOH = -LOG([OH])  

pOH = -LOG(4.5*10^-9)  

pOH = 8.34  

pH + pOH = 14  

pH = 14 - 8.34 = 5.65

hope this helps!

(:

5 0
3 years ago
(1.7 x 10-5 m) x (3.72 x 10-4 m) *
rosijanka [135]

Answer:

The answer will be 1992/5 or 398.4

7 0
3 years ago
Arrange these elements according to atomic Pb Si C Sn Ge
choli [55]
........C<Si<Ge<Sn<Pb
5 0
3 years ago
What intramolecular bonds does H2 have
posledela
Covalent. The two hydrogen atoms share their electrons such that both outer shells are filled.
6 0
3 years ago
Read 2 more answers
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