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Dahasolnce [82]
3 years ago
6

A radio station's channel, such as 100.7 FM or 92.3 FM, is actually it's frequency in megahertz, where 1 MHz=10^6Hz and 1 Hz=1s^

-1.
Calculate the broadcast wavelngth of the radio station 99.30 FM.
Chemistry
1 answer:
gayaneshka [121]3 years ago
5 0

We can directly solve this problem using the wavelength formula which is:

wavelength = speed of light / frequency

We know from the given that 99.30 FM = 99.30 MHz, therefore:

wavelength = (2.99*10^8 m/s) / (99.30*10^6 Hz) <span>
<span>wavelength = 3.011 meters</span></span>

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In a 100 g sample of iron(III) oxide, how many grams of iron are present?
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The formula of Iron(III) oxide is Fe2O3
In order to calculate the mass of iron in a given sample of iron(III) oxide, we must first know the mass percentage of iron in iron(III) oxide. This is calculated by:
[mass of iron in one mole of iron(III) oxide/ mass of one mole of iron(III) oxide] * 100 
= [(moles of iron * Mr of iron) / (moles of Iron * Mr of Iron + moles of Oxygen * Mr of Oxygen)] * 100
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