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Mathcat444
27.11.2019 •
Mathematics
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide. what is the percent yield of carbon dioxide if 3.65 g of the gas is collected when 10.0 g of marble reacts?
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Ответ:
You have to find which is limiting first, we take 10g of marbles10g marbles×1 mol marbles/40+12+3(16)g marbles×1 mol CO2/1 mol marbles=0.4 mol CO2
Then0.4 mol CO2 ×12+2(16)g CO2/1 mol CO2=17.6g of CO2
Based on theoretical calculations, you should get 17.6g of CO2, but it turns out that you only have 3.65g of CO2 collected, so,3.65g17.6g×100=20.7 percent
Ответ:
The dimensions of the enlargement picture are 28 1/8 inches width and 16 7/8 inches length
Step-by-step explanation:
we know that
To find out the dimensions of the enlargement, multiply the original size by the scale factor
we have
The scale factor is 4 1/2
Original size of the picture are 6 1/4 in width, 3 3/4 inches length
step 1
Convert mixed number to an improper fraction
step 2
Find out the dimensions of the enlargement
Width
Convert to mixed number
Length
Convert to mixed number
therefore
The dimensions of the enlargement picture are 28 1/8 inches width and 16 7/8 inches length