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Kitty [74]
3 years ago
11

A group of scientists are studying the effects of different fertilizers on the growth of pea plants. They began their study with

10 pea plants. They gave each plant a different type of fertilizer and tracked their growth over a period of 2 months. The results of this experiment weren’t considered valid by other scientists because there was no control group. Which of the following represents an appropriate control group for this experiment? A. A group of plants that’s subjected to two fertilizers B. A group of plants that’s subjected to one fertilizer C. A group of plants that’s not subjected to any fertilizer D. A group of plants that’s subjected to all types of fertilizers
Chemistry
2 answers:
Ymorist [56]3 years ago
5 0
Probably A hope this helps.
docker41 [41]3 years ago
3 0
From what i read I’d say the answer is B
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bezimeni [28]

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4 0
3 years ago
If element x forms the oxides xo and x2o3 the oxidation numbers of element x are
Deffense [45]

Answer:

b) +2 and +3.

Explanation:

Hello,

In this case, given the molecular formulas:

XO

And:

X_2O_3

We can relate the subscripts with the oxidation states by knowing that they are crossed when the compound is formed, for that reason, we notice that oxygen oxidation state should be -2 for both cases and the oxidation state of X in the first formula must be +2 since both X and O has one as their subscript as they were simplified:

X^{+2}O^{-2}

Moreover, for the second case the oxidation state of X should be +3 in order to obtain 3 as the subscript of oxygen:

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3 0
3 years ago
77.In the early days of automobiles, illumination at night was provided by burning acetylene, C2H2. Though no longer used as aut
natta225 [31]

Answer:

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3 0
3 years ago
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OLga [1]

Answer:

I'm pretty sure the answer is C.

4 0
2 years ago
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