Explain why two thin sweaters feel warmer then one thick sweater
1 answer:
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Answer:
Explanation:
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In this case, according to the given information derived from the combustion analysis, it turns out possible for us to realize that all the carbon comes from the CO2 and all the hydrogen from the H2O, it means we can calculate their moles in the vitamin C as shown below:
Next, we calculate the grams and moles of oxygen from the grams of C and H in the sample:
Then, we divide the moles of C, H, O by 0.0165 as the fewest moles in order to calculate the correct mole ratios:
Finally, we turn them into whole number by multiplying by 3 so that the empirical formula is:
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Answer:
6.02 x 10²²molecules
Explanation:
Given parameters:
Mass of CO₂ = 4.4g
Unknown:
Number of molecules in CO₂ = ?
Solution:
To find the number of molecules in the given mass, we have to find the number of moles in the compound first;
Number of moles =
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Insert the parameters and solve;
Number of moles = = 0.1mol
1 mole of a substance contains 6.02 x 10²³molecules
0.1 mole of CO₂ will contain 0.1 x 6.02 x 10²³molecules
= 6.02 x 10²²molecules