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Elena-2011 [213]
3 years ago
11

Definition: This is an important principle of the scientific method in which an experiment can accurately be reproduced by an in

dependent researcher. Replication shows that test results can be reproduced with different scientists and lab equipment.
Chemistry
1 answer:
zysi [14]3 years ago
7 0

Answer:

Replicate.

Explanation:

Replicate: This is an important principle of the scientific method in which an experiment can accurately be reproduced by an independent researcher. Replication shows that test results can be reproduced with different scientists and lab equipment.

Hence, when test experiments are performed or conducted and the same results are gotten, it ultimately implies that the research is statistically significant and correct. A theory can be developed by the repetition or replication of a hypothesis.

In scientific process, researchers do not rely on a single test. They replicate tests over and over to see if they will get the same results.

In conclusion, if an experiment, investigation or findings can't be replicated then the method of testing isn't sufficient, theoretical and not reliable for use.

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The balanced chemical reaction is:

CH4 + 2O2 —> CO2 + 2H2O

You need to convert mass to moles (divide by molar mass):

CH4 moles = 5 / 16 = 0.31 mol
O2 moles = 5 / 32 = 0.16 mol

To figure out which reactant is limiting, divide the actual moles by the corresponding coefficient in the reaction:

CH4: 0.31 / 1 = 0.31
O2: 0.16 / 2 = 0.08

O2 is the lower number, so it is the limiting reactant. From the reaction we know it takes 2 moles of O2 to react with each mole of CH4. Therefore, for however many moles of O2 we actually have, half as many moles of CH4 will react. Since we have 0.16 mol of O2, only 0.08 mol of CH4 will react, leaving behind 0.31 - 0.08 = 0.23 mol of CH4.

Now convert back to mass (multiply by molar mass) to find the mass of CH4 remaining:

0.23 x 16 = 3.68g

The closest answer is B.
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