The oxidation numbers of nitrogen in NH3, HNO3, and NO2 are, respectively: -3, -5, +4 +3, +5, +4 -3, +5, -4 -3, +5, +4
Evgesh-ka [11]
In NH3 , let oxidation number of N be x
x + (+1)3 = 0
x = -3
In HNO3 , let oxidation number of N be x
1 + x + (-2)3 = 0
x = +5
In NO2 , let oxidation number of N be x
x + (-2)2 = 0
x = +4
Answer:
-169°C to -104°C
Explanation:
Ethene, also known as ethylene exists in solid, liquid and gaseous states. Ethene is an aliens with condensed structural formula C2H4. Athens is a colourless gas. It is flammable and is also a sweet smelling gas in its pure form. It is the monomer in the production of polyethylene which is of great importance in the plastic industry. In agriculture, it is used to induce the ripening of fruits. It can be hydrated in order to produce ethanol.
The liquid range of ethene refers to the temperatures at which ethene is found in the liquid state of matter. It is actually the difference between the melting point and the boiling points of ethene. Hence the liquid range of ethene is -169°C to -104°C
Soda provides nutritional value that helps plants grow.
Explanation:
I just did this question and that’s what was right.
a. 0.51 moles of Mg
b. 0.25 moles of F
Explanation:
a. To find the number of moles knowing the mass we use the following formula:
number of moles = mass / molecular weight
number of moles of Mg = 12.15 / 24 = 0.51 moles
b. To find the number of moles knowing the number of atoms we use Avogadro's number to illustrate the following reasoning:
if in 1 mole of F there are 6.022 × 10²³ atoms of F
then in X moles of F there are 1.5 × 10²³ atoms of F
X = (1 × 1.5 × 10²³) / 6.022 × 10²³
X = 0.25 moles of F
Learn more about:
Avogadro's number
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