(3)- gamma ray has no charge and no mass
Answer:
79.14%
Explanation:
Given the equation : 2Fe2O3 + 3C 4Fe + 3C02
The theoretical yield of CO2 ; is 102.6g
Actual yield = 81.2 gram
Percentage yield = (actual yield / theoretical yield) * 100%
Percentage yield = (81.2 / 102.6) * 100%
Percentage yield = 0.7914230 * 100%
Percentage yield = 79.14%
Hence, tbe percentage yield of CO2 is 79.14%
Answer:
(a) The change in energy of the atom is --6.0528 X 10⁻²⁰ J
(b) The wavelength of the photon is 32841 Å
Explanation:
E = -kz²/n²
Where;
E is the change in the energy of the atom
k is a constant = 2.179 X 10¹⁸ J
z is the atomic number of hydrogen = 1
n = 6
E = -(1 X 2.179 X 10⁻¹⁸ )/6²
E = -6.0528 X 10⁻²⁰ J
Therefore,the change in energy of the atom is -6.0528 X 10⁻²⁰ J
(b) the wavelength (in Å) of the photon, can be calculated as follows;
E = hc/λ
λ = hc/E
where;
h is Planck's constant = 6.626 X 10⁻³⁴ js
c is the speed of light = 3 X 10⁸ m/s
λ is the wavelength of the photon
λ = (6.626 X 10⁻³⁴ X 3 X 10⁸ )/(6.0528 X 10⁻²⁰)
λ = 3.2841 X 10⁻⁶ m
λ = 32841 Å
Therefore, the wavelength of the photon is 32841 Å
4 gallons
1 pint=0.125 gallons
0.125 times 33= 4.125
Alchemists advanced the tools and procedures for working with chemicals. Alchemists also developed methods for sorting out mixtures and cleansing chemicals. They designed equipment that is still in use today including beakers, flasks, tongs, funnels, and the mortar and pestle. Also, Alchemists backed to an unbelievable variety of what would later be acquainted as chemical industries: basic metallurgy, metalworking, the invention of inks, dyes, paints, and cosmetics, leather-tanning, and the preparation of extracts and liquors.
