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kirza4 [7]
3 years ago
13

"a basic experiment involves a minimum of ________ participant group(s)."

Chemistry
1 answer:
3241004551 [841]3 years ago
5 0
Answer: TWO.

At least two groups: treatment group and control group.

The treatment group is that is exposed to the different levels of the independent variable ( a medication for example), while the control group is not treated, so the researchers can compare the effect of the medication.
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Just study it by looking it up
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Which substances are released during cellular respiration?
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2<br>what is soil profile​
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Answer:

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3 years ago
A solution used to chlorinate a home swimming pool contains 7% chlorine by mass. An ideal chlorine level for the pool is one par
deff fn [24]

Answer:

Volume of chlorine = 61.943 mL

Explanation:

Given:

Volume of the water in the Pool = 18,000 gal

also,

1 gal = 3785.412 mL

thus,

Volume of water in pool = 18,000 × 3785.412 = 68,137,470 mL

Density of water = 1.00 g/mL

Therefore,

The mass of water in the pool = Volume × Density

or

The mass of water in the pool = 68,137,470 mL × 1.00 g/mL = 68,137,470 g

in terms of million = \frac{\textup{68,137,470}}{\textup{ 1,000,000}}

or

= 68.13747 g

also,

1 g of chlorine is present per million grams of water

thus,

chlorine present is 68.13747 g

Now,

volume = \frac{\textup{Mass}}{\textup{Density}}

or

Volume of chlorine = \frac{\textup{68.13747 g}}{\textup{1.10 g/mL}}

or

Volume of chlorine = 61.943 mL

3 0
4 years ago
In an pot of water you have 2.5 L at 25oC. How much energy will be needed to heat up the water to 100oC
Oksanka [162]

Answer:

784500 Joules

Explanation:

To start, you will need an equation to find the change in energy. This can be found by using Q = mCT or by using integrated heat capacities.

to find the mass of water,

2.5L * 1kg/L = 2.5 kg water

1kg/L is the density of water.

Then, Q = 2.5kg*4.184J/gC*(100-25)

Notice that all of the units do not cancel out properly, so some unit conversions are needed to find the correct answer.

3 0
3 years ago
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