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BabaBlast [244]
3 years ago
11

All chemicals should be stored in ?

Chemistry
2 answers:
netineya [11]3 years ago
5 0

im a container or a glass

kari74 [83]3 years ago
4 0

Liquids should be stored in unbreakable or double-contained packaging, or the storage cabinet should have the capacity to hold the contents if the container breaks. Store acids in a dedicated acid cabinet.

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When rocks grind and squeeze past each other,___metamorphism occur.
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Explanation:

When rocks grind and squeeze past each other, dynamic metamorphism can occur.

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It is the nimbostratus cloud.  

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Which physical property is being used to separate the mixtures in each of the following cases?
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What is the critical temperature at which hydrogen can begin to fuse into helium in the core?
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The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxygen. combustion of
aev [14]

Answer: <em>C₃H₆O</em>


Explanation:


1)  First, calculate the chemical composition, which you do using balance mass using the data given.


2) Data:


i) mass of ethyl butyrate: 2.22 mg

ii) mass of CO₂: 5.06 mg

iii) mass of H₂O: 2.06 mg


3) Solution


i) All the carbon in CO₂ produced was present in the ehtyl butyrate sample.


ii) The molar mass of CO₂ is 44.01 g/mol


iii) Use proportionality:


12.01 g C / 44.01 g CO₂ = x / 5.06 mg C  ⇒ x = 1.38 mg  C


iv) All the H in H₂O was present in the original sample of ethyl butyrate


v) The molar mass of H₂O is 18.015 g/mol


vi) Use proportionality


2.016 g H / 18.015 g H₂O = x / 2.06 mg H ⇒ x = 0.23 mg H


vii) Mass balance:


mass of O in the sample = mass of the sample - mass of H - mass of C


mass of O = 2.22 mg - 1.38 mg - 0.23 mg = 0.61 mg O.


viii) Composition:

C = 1.38 mg

H = 0.23 mg

O = 0.61 mg


Which in terms of composition is the same that:

C = 1.38 g

H = 0.23 g

O = 0.61 g


ix) Divide each by the molar atomic mass of the corresponding element, to obtain the number of moles:


C = 1.38 g / 12.01 g/mol = 0.115 mol

H = 0.23 g / 1.008 g/mol = 0.228 mol

O = 0.61 g / 16 g/mol = 0.0381 mol


x) Divide each by the least number of moles to obtain mole proportion


C = 0.115 / 0.0381 = 3.02 ≈ 3

H = 0.228 / 0.0381 = 1.98 ≈ 5.98 ≈ 6

O = 0.0381 / 0.0381 = 1


xi) Therefore the empirical formula searched is <em>C₃H₆O</em>.


7 0
3 years ago
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