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2 years ago

What is a control group?

Chemistry

2 answers:

kkurt [141]2 years ago

7 0

Answer:

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

Explanation:

The purpose of a control group is to ensure that the independent variable you are testing is really causing the outcomes in the experimental group.

zalisa [80]2 years ago

3 0

Answer: D

Explanation:

A control group is the variable that remains constant throughout the whole experiment

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Which property is shared by both acids and bases?

Evgen [1.6K]

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3. Conducts electricity in aqueous solution.

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3 years ago

(IMAGE ATTACHED) Help plssss this is due in 3 hours

Natasha2012 [34]

Answer:

Acceleration:

Speed/Time

Change in speed or velocity over a specific amount of time

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Distance/Time

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3 years ago

What happens to acetone molecules when you add heat to a beaker of liquid acetone? They gain a higher average kinetic energy. Th

iVinArrow [24]

When you heat up most substances it gives them more Kinetic energy and the substance becomes less arranged in an ordered state, further apart and move faster. therefore the answer is the first: They gain a higher average kinetic energy

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3 years ago

Which of the following scientists was the first to determine the

Maru [420]

Answer:

Robert Boyle

Explanation:

Robert Boyle was an Irish chemist and is famously referred to as the first modern chemist. He was born on the 25th of January, 1627 in Lismore, Ireland and died on the 31st, December 1691, London, United Kingdom.

Robert Boyle was the first to determine the relationship between the pressure and volume of a gas.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

$PV = K$

$P_{1}V_{1} = P_{2}V_{2}$

Where;

V1 and V2 represents the initial and final volumes respectively.

T1 and T2 represents the initial and final temperatures respectively.

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3 years ago

A 2.26 M solution of KOH is prepared. Calculate the moles and mass of solute present in a 15.2-mL sample of this solution. The m

kenny6666 [7]

Answer:

0.0344 moles and 1.93g.

Explanation:

Molarity is defined as the ratio between moles of a solute (In this case, KOH), and the volume. With molarity and volume we can solve the moles of solute. With moles of solute we can find mass of the solute as follows:

Moles KOH:

15.2mL = 0.0152L * (2.26mol / L) = 0.0344moles

Mass KOH:

0.0344 moles * (56.11g/mol) = 1.93g of KOH

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3 years ago