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neonofarm [45]
3 years ago
8

Balance this equation- Fe + O2 Fe3 O4

Chemistry
1 answer:
kherson [118]3 years ago
7 0
3Fe + 2O2 —- Fe3 + O4
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What is the mass (in grams) of 9.79 × 1024 molecules of methanol (CH3OH)?
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We will use this formlula: Mass in grams = Number of moles x Molecular mass of 1 mole.

Since, we know the avagadro number is 6.02 x 10²³, we only have two unknown values left which are the molecular mass of CH3OH and its mole.

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Number of moles of CH3OH = (9.79 x 10^24)/6.02 x 10²³) =  16.263 moles.

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</span>
Mass in grams = 16.263 x 32 = 520g






6 0
3 years ago
Which statement best describes what happens when a person sees an orange t-shirt?
Alex73 [517]

Answer:

The correct answer is - Orange light reflected from the t-shirt enters human eyes.

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The objects are able to absorb some colors and reflect others on the basis of their wavelength, The reflected colors are detected by our eyes and brain and objects appear to be a particular color. like here, the orange color is reflected by the t-shirt and enters in human eyes.

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