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Sindrei [870]
3 years ago
12

What are the only things that can change in a valid experiment?

Chemistry
1 answer:
Firlakuza [10]3 years ago
7 0
You can change any variable in an experiment (the amount of water, sun, type of light, fertilizer etc.) but for the experiment to be VALID only one thing can be changed for the experiment.
Example: I’m trying to see if the plant will grow better with more or less water so the only thing that changes is the amount of water. Everything else will have to be the same (type of plant, fertilizer,dirt, container it grows in, amount of light etc.)
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3 years ago
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Sodium hydroxide is classified as a strong base in water. This means that it produces no hydroxide ions. 100% of the maximum num
mr Goodwill [35]

Answer:

Hi

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In the presence of ambient humidity, sodium hydroxide reacts with carbon dioxide to generate sodium carbonate. The gradual hydration generates six different hydrates: NaOH.H2O, NaOH.2H2O, NaOH.3.5H2O, NaOH.4H2O, NaOH.5H2O, NaOH.7H2O. Its great affinity for water causes a reduction in water vapor pressure and for that reason it is a very good drying agent.

Explanation:

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3 years ago
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The average atomic mass of chromium is 52.00 amu. What is the mass of 3.0 mol of chromium?
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At 304 K, a 9.6 L tank contains 1.9 moles of H2 gas under an unknown pressure in atm. What is the pressure of the gas in the tan
ratelena [41]

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Explanation:

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PV = nRT

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Substituting the given values we get -

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The pressure is 4.939 atm

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