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love history [14]
3 years ago
10

The ___ is the best part of an experiment that is not being tested and it used for comparison

Chemistry
2 answers:
Anettt [7]3 years ago
5 0
The answer is control 








aleksandr82 [10.1K]3 years ago
3 0
The control is the part of an experiment that is not being tested and it is used for comparison. 
The control is the best way for us to understand how the variables effect our experiments. 
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using the equaation 2h2+o2-->2h2o if 10.0g of hydrogen are used in the presence of excess oxygen how many grams of water will
astra-53 [7]

Answer:

90g of H2O

Explanation:

2H2 + O2 —> 2H2O

First, we calculate the molar masses of H2 And H20.

Molar Mass of H2 = 2g/mol

Mass conc of H2 from the balanced equation = 2 x 2 = 4g

Molar Mass of H2O = 2 + 16 = 18g/mol

Mass conc of H2O from the balanced equation = 2x18 = 36g

From the equation,

4g of H2 produced 36g of H2O

Therefore, 10g of H2 will be produce = (10x36)/4 = 90g of H2O

7 0
2 years ago
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Oduvanchick [21]
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Valentin [98]
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3 years ago
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If a balloon is filled with a mixture of helium and oxygen, which gas will escape faster? Why?
Serjik [45]

Answer:

The rate of leakage will be higher for helium; its molecules move about 3 times faster than oxygen’s

Explanation:

Step 1: Data given

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Step 2: Graham's law

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How is helium different from other noble gases?
Slav-nsk [51]
Helium only possesses two valence electrons, while the other noble gasses posses eight
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