A student is trying to calculate the density of an ice cream cone. She already knows the mass, but she needs to determine the vo
2 answers:
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Answer:
14 moles of oxygen needed to produce 12 moles of H2O.
Explanation:
We are given that balance eqaution
We have to find number of moles of O2 needed to produce 12 moles of H2O.
From given equation
We can see that
6 moles of H2O produced by Oxygen =7 moles
1 mole of H2O produced by Oxygen=moles
12 moles of H2O produced by Oxygen=moles
12 moles of H2O produced by Oxygen=moles
12 moles of H2O produced by Oxygen=14 moles
Hence, 14 moles of oxygen needed to produce 12 moles of H2O.
Answer: The wavelength of the x-ray wave is
Explanation:
To calculate the wavelength of light, we use the equation:
where,
= wavelength of the light = ?
c = speed of x-ray=
= frequency of x-ray =
Putting in the values:
Thus the wavelength of the x-ray wave is