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Zinaida [17]
3 years ago
6

Help please??????????????????????

Chemistry
1 answer:
wolverine [178]3 years ago
6 0

Answer:

this app is it tool for people to learn and grow not a place for people to place their homework and have it answered within. a few seconds

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Calculate the percent composition by mass of each element in Al(OH)3. Use at least three significant figures.
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Name two geologic features found on Earth surface that were caused by the movement of crustal plates.
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Formation of mountains by one continental plate moving into another (Indian plate pushing north, forming the Himalayas)

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Which of the following pieces of laboratory glassware should be used to most accurately measure out a 25.00 ml sample of a solut
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Answer:

The correct answer is 25 mL graduated cylinder (it should be used in all the cases)

Explanation:

In order to measure 25.00 ml sample of a solution it should be used a 25 mL graduated cylinder, as it is previously and properly calibrated. The other laboratory glassware, beaker and erlenmeyer, have graduations which are approximate, so they are used when exact volumes are not needed.

ii) graduated cylinder has the least uncertainly. It is more accurate than a beaker or erlenmeyer (to within 1%)

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3 years ago
When 5ml of HCl was added
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Answer:

A. There was still 140 ml of volume available for the reaction

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According to Avogadro's law, we have that equal volumes of all gases  contains equal number of molecules

According to the ideal gas law, we have;

The pressure exerted by a gas, P = n·R·T/V

Where;

n = The number of moles

T = The temperature of the gas

R = The universal gas constant

V = The volume of the gas

Therefore, given that the volumes and number of moles of the removed air and added HCl are the same, the pressure and therefore, the volume available for the reaction will remain the same

There will still be the same volume available for the reaction.

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Name one other organ system that would be affected if it had no marrow.Explain?
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