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Vitek1552 [10]
3 years ago
15

Record the volume of solution that will be delivered from the pipet pictures below in units of mL

Chemistry
1 answer:
zloy xaker [14]3 years ago
7 0

Answer:

2a. 3mL.

2b. 10mL.

3. 38°C.

Explanation:

2a. We read the volume under the meniscus i.e under the curve.

The volume of the solution is 3mL.

2b. The volume of the pipette 10mL and the solution is at the calibration mark. Therefore, the volume of the solution is 10mL.

3. From the diagram given, we can see that 1 line represents 1 unit.

Now a careful look at the picture shows that the temperature is 38°C.

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How can I calculate the mass percent of carbon, nitrogen and oxygen in caffeine, C8H10N4O2.
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You must first calculate the total weight of 1 mole of the substance. You do this by finding the molar weights on the periodic table of each of the elements in the compound:

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So now we take the amount of each element that is given in the compound and divide it by the total mass of the compound:

Carbon: 96.08g

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Nitrogen: 56.028g

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Nitrogen = 28.85%

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Answer:

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Explanation:

Given data:

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