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allochka39001 [22]
4 years ago
8

Q23 Stoichiometry

Chemistry
1 answer:
Deffense [45]4 years ago
6 0

Answer:

6.0 x 10^-1 g Fe

Explanation:

I might be in the wrong but hear me out:

Convert 0.85 g to mols of Fe2O3.

0.85 g x 1 mol/159.69=0.0053 mols Fe2O3.

Get moles of Fe (iron metal).

0.0053 mols Fe2O3 x 2 mol Fe/ 1 mol Fe2O3

= 1.0 x 10^-2 mols Fe

Convert moles to grams of Fe.

1.0 x 10^-2 mols of Fe x 55.85 grams Fe/ 1 mol Fe

= 6.0 x 10^-1

There should be only one sig fig. Hoped this helped.

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a stone is found to have a volume of 34.9cm3. it has a mass of 30.8g. what is the density of the stone
FromTheMoon [43]

Answer:

Explanation:

ρ =  

m

V

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3 0
4 years ago
Question 22 A VHF television station assigned to channel transmits its signal using radio waves with a frequency of . Calculate
aleksklad [387]

The question is incomplete, here is the complete question:

A VHF television station assigned to channel transmits its signal using radio waves with a frequency of 66.0 MHz. Calculate the wavelength of the radio waves. Round your answer to 3 significant digits.

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<u>Explanation:</u>

To calculate the wavelength of light, we use the equation:

\lambda=\frac{c}{\nu}

where,

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Putting the values in above equation, we get:

\lambda=\frac{3\times 10^8m/s}{66.0\times 10^{6}s^{-1}}=4.54m

Hence, the wavelength of the radio waves is 4.54 m

6 0
4 years ago
Identify the reactants and products in each chemical reaction
enot [183]
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8 0
3 years ago
When does the first step of digestion usually occur?
SVEN [57.7K]

Answer:

B.

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Explanation:

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5 0
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