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Elden [556K]
4 years ago
5

3. Which weather technology is used to gather pressure, wind speed, and other first-hand observations of hurricanes that are out

at sea?
satellites
Doppler radar
weather balloons
reconnaissance aircraft
Chemistry
2 answers:
djverab [1.8K]4 years ago
8 0
The Doppler radar hope this helps :P
Licemer1 [7]4 years ago
7 0

Its satellites my dude / dudette : 3

 

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Explanation:

You write your answer with the same number of significant figures as the number with the smallest amount of figures, in this case, that number is 2.1 so your answer should be written with 2 significant figures.

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For the complete combustion of 47 g of gasoline (octane, C8H18) , the mass of oxygen consumed is
aleksklad [387]

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Explanation:

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\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}     \text{Moles of octane}=\frac{47g}{114g/mol}=0.412moles

The balanced chemical reaction is:

2C_8H_{18}(l)+25O_2(g)\rightarrow 16CO_2(g)+18H_2O(g)  

According to stoichiometry :

2 moles of C_8H_{18} require = 25  moles of O_2

Thus 0.412 moles of C_8H_{18} will require=\frac{25}{2}\times 0.412=5.15moles  of O_2

Mass of O_2=moles\times {\text {Molar mass}}=5.15moles\times 32g/mol=164.9g

Thus 164.9 g of oxygen is consumed.

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