What does it mean to have a control group

2 answers:

4 0

The control group<span> is defined as the </span>group<span> in an experiment or study that </span>does<span> not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects </span>do<span>.</span>

Mashcka [7]3 years ago

3 0

Control group is a group in a lab or project that is completely controlled and you know exactly how you want it to go. Example: you have your controlled group of cereal and theyre all froot loops with the same cereal same bowl. the opposite of that would be having the same bowl, same milk, and 3 different cereal brands.

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How many atoms are in a sample of 1.83 moles of potassium (K) atoms? Please explain the conversions to me. Thank you!

IRINA_888 [86]

1 mole K ------------- 6.02x10²³ atoms
1.83 moles K ------ ?? atoms

1.83 x (6.02x10²³) / 1 =

1.101x10²⁴ atoms of K

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6 0

3 years ago

What is the percent of O in<br> CO2?

katen-ka-za [31]

Answer:

72.7% of oxygen

Explanation:

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3 years ago

O2- is the Lewis ______ in the following reaction

matrenka [14]

$O^{2-}$ is the Lewis base in the following reaction:

$SO_3(g) + O^{2-}(aq)$ → $SO_4^{2-}(aq)$

<h3>What is lewis base? </h3>

Lewis base is a species that donates an electron pair.

In the above-given chemical equation, the $O^{2-}$ is the lewis base which is donating an electron pair to the central atom of $SO_3$ to form $SO_4^{-2}$ .