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anygoal [31]
4 years ago
5

What is a control variable?

Chemistry
1 answer:
Georgia [21]4 years ago
3 0

Controlled variables are variables that an experimenter keeps constant to prevent confounding with the independent variable. The are called this because the experimenter controls them. For example, suppose you want to compare the effectiveness of hypnosis and relaxation as treatments for stress.

Hope this helps!

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Find the molecular mass of<br>MgSO4 7H₂O.​
mario62 [17]

Answer:

MgO +H2SO4

Explanation:

use photomath

7 0
3 years ago
Why might a bright yellow solid form when two clear colorless are mixed
Sergio [31]
This is a chemical reaction because a precipitate (solid) was formed from 2 liquids, and there was a color change as well
5 0
3 years ago
What is a paper clip, a colloid? solution? or a suspension?
Galina-37 [17]

Explanation:

a colloid is a nonuniform mixture of a solute and a solvent in which the particles are permanently suspended.

solution is a uniform mixture of a solute and a solvent.

suspension is a nonuniform mixture of a solute and a solvent in which the particles are temporary suspended

paper clip is used to hold papers in position

6 0
3 years ago
Read 2 more answers
A. At STP, what is the volume of 708 mol of nitrogen gas? 708 mol = 708 mol X L B. A sample of hydrogen gas occupies 14.1 L at S
elena-14-01-66 [18.8K]

Answer:

A. 15859.2 L or 15900 L

B. 0.629 mol

Explanation:

At STP, one mole is equal to approximately 22.4 L

L or mL is volume, so you are attempting to solve for L or mL.

A.

708 mol x (22.4 L/1 mol) = 15859.2 L (w/ significant figures included - 15900 L)

B.

(14.1 L) x (1 mole/ 22.4 L) = 0.629 mol.

5 0
3 years ago
Hydrogen and helium cannot condense to gas at temperatures above water's freezing point. when planets would be made of gas?
kodGreya [7K]

Answer:

no.

Explanation:

only one planet would be made gas

is earth. and for what you mean like when

planet would be made of gas my answer is no

because theirs so gravity but im not the one

who's deciding and god is the one who's deciding

if when is the other planet having a gas

i know im wrong

8 0
3 years ago
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