A certain hydrocarbon was found to contain only 18g of carbon and 4g of hydrogen in a 22g sample. Determine its Empirical formula

C₃H₈

Explanation:

First, convert mass to moles.

18g C (1 mol C / 12 g C) = 1.5 mol C

4g H (1 mol H / 1 g H) = 4 mol H

Multiply by 2 to get integers:

3 mol C and 8 mol H

The empirical formula is C₃H₈.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them