why does every human measurement have uncertainty associated with it? Why must we manage the uncertainty during calculations?

1 answer:

3 0

Because there are many numbers of the human measurement . we must manage the uncertainly doing calculations because we can know what we are calculating.

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There is a gas at 780 mm of Hg, in a volume of 5 liters and a temperature of 37 C, the volume is changed to 5.5 liters and the

HACTEHA [7]

Answer:

32.8 C

Explanation:

- Use combined gas law formula and rearrange.

- Hope that helped! Please let me know if you need further explanation.

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How many liters of oxygen are in 8.32 moles of oxygen at STP

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Answer:

186 Liters at STP conditions

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7.3% would be the correct answer

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Whenever fa body object is in motion there is always ____ to oppose the motion

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Friction. Imagine rubbing your hand against a carpet and how it gets hot even though you are pushing it afar. That is friction.

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A sample of a certain lead compound contains 12.92 g of lead for 2 g of oxygen. A second sample has mass of 34.27 g and contains

Elis [28]

The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

<h3>What is a chemical compound?</h3>

A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.

<h3>What are the calculations?</h3>

sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .

sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .

so, the ratios are not the same.

Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

To know more about Chemical compounds, check out:

brainly.com/question/26487468

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