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Sedaia [141]
3 years ago
11

Ben and Jerry were testing powders in science lab. First they put the powder in a zip lock bag. Next they added some water. The

powder fizzed and bubbled; soon it disappeared. When the bubbling stopped the bag contained a clear liquid and a lot of gas.
What is the MOST OBVIOUS sign of a chemical change in this reaction?
Chemistry
2 answers:
ch4aika [34]3 years ago
6 0
The powder fizzled and bubbled; soon it disappeared.
fgiga [73]3 years ago
3 0
The most obvious one is that when the powder came into contact with the water it fizzed.
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Answer:

11.3 g.

Explanation:

Hello there!

In this case, since the combustion of butane is:

C_4H_{10}+\frac{13}{2} O_2\rightarrow 4CO_2+5H_2O

Thus, since there is a 1:5 mole ratio between butane and water, we obtain the following mass of water:

m_{H_2O}=7.26gC_4H_{10}*\frac{1molC_4H_{10}}{58.14gC_4H_{10}}*\frac{5molH_2O}{1molC_4H_{10}}  *\frac{18.02gH_2O}{1molH_2O}

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