Answer:
The lowest whole number mass ratio of nitrogen that combines with a given mass of oxygen is 1:1
Explanation:
In compound A, we have 14 g of nitrogen combine with 16 g of oxygen
In compound B, we have 14 g of nitrogen combine with 32 g of oxygen
Therefore, we have
A B
Ratio of molar masses 14:16 14:32
Mass of O that combine with 1 g of N 1.14 2.29
Dividing by the smallest mass ratio 1 2
Therefore the lowest whole number mass ratio at which oxygen and nitrogen can combine = 1:1.
<span>Answer:
Uric acid is advantageous for nitrogenous waste excretion in insects because of low toxicity, excreted.</span>
Mass of Zirconium (Zr) in 0.040 moles : 3.6 g
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
moles of Zirconium : 0.04
mass of Zirconium (MW=91,224 g/mol) :
This is an example of
Nucleophilic Substitution Reaction. The
Substrate (Methyl Bromide) is attacked by a
Nucleophile (Ethoxide), the
Leaving group (Bromide) leaves the substrate and ethoxide replaces it and forms a
Product (Methoxy Ethane). Reaction is shown below,
1/3 fraction of the original uranium-235 should be left after 3.5 billion years
The only naturally occurring isotope of this radioactive metal, uranium-235, is capable of supporting a nuclear fission reaction, making it special. A variation of an element called an isotope has a different number of neutrons in its nucleus. Approximately 93.5 percent of the uranium used in modern nuclear bombs is enriched.
On average, plutonium-239 makes up 93% or more of nuclear bombs, whereas plutonium-240 makes up less than 7% and other plutonium isotopes are present in extremely minute amounts. A nuclear bomb requires around 33 pounds (15 kilograms) of enriched uranium to function, according to the Union of Concerned Scientists.
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