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FromTheMoon [43]
2 years ago
14

Coffee shops sell paper coffee cups with cardboard sleeves for customer safety. Why?

Chemistry
1 answer:
11111nata11111 [884]2 years ago
4 0

The cardboard sleeves reduce the heatness from the coffee cup. So then the cosumer does not get a burn.

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Complete combustion of 8.10 g of a hydrocarbon produced 25.9 g of CO2 and 9.27 g of H2O. What is the empirical formula for the h
balu736 [363]

CxHy     +  O2    -->    x CO2     +    y/2  H2O

 

Find the moles of CO2 :     18.9g  /  44 g/mol   =    .430 mol CO2   = .430 mol of C in compound

Find the moles of H2O:      5.79g / 18 g/mol     =     .322 mol H2O   = .166 mol of H in compound

 

Find the mass of C and H in the compound:

                             .430mol  x 12  =  5.16 g C

                              .166mol  x 1g   = .166g H   

 

When you add these up they indicate a mass of 5.33 g for the compound, not 5.80g as you stated in the problem.

Therefore it is likely that either the mass of the CO2 or the mass of H20 produced is incorrect (most likely a typo).

In any event, to find the formula, you would take the moles of C and H and convert to a whole number ratio (this is usually done by dividing both of them by the smaller value).

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3 years ago
Which two body systems are most important in breaking down food and distributing nutrients throughout the body?
andrey2020 [161]

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hope you like and pls follow me

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digestive and circulatory system are most important in breaking down food and distributing nutrients throughout the body.

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Which best describes a compound such as sodium chloride?
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It s a pure substance.

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Can only be separated into its different elements by chemical means because it is connected by a chemical bond.

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When no oxygen is available
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