Sodium is Na: +1
Nitrate is NO3:-1
=> NaNO3
Answer:
NH2.
Explanation:
The mass of hydrogen in the sample = 1.525 - 1.333 = 0.192g.
Dividing the 2 masses by the relative atomic mass of hydrogen and nitrogen:
H: 0.192 / 1.008 = 0.1905
N: 1.333 / 14.007 = 0.09517
The ratio of N to H = 0.09517 : 0.1905
= 1 : 2.
So the empirical formula is NH2.
Answer:
Iron is being oxidized. (Ans. B)
Explanation:
Half reaction is defined as either the reduction where electrons are gained or oxidation where electrons are lost of the redox reaction. Half reaction is produced by change in the oxidation state of individual molecule which is involved in the redox reaction.
A good example of redox reaction is known as rusting. In this process oxygen take electrons from iron, then iron gets oxidized, and oxygen gets reduced. This process results the compound known as rust, or iron oxide.
Fe----> Fe2+ +2e-.
Answer:
C. radioactive material
Explanation:
This exposure primarily comes from cosmic rays, radioactive material in the earth (such as uranium-238), ingestion of naturally occurring radionuclides in food (such as potassium- 40), and inhalation of radon gas. In the United States, the average background radiation dose is 300 mrem/yr.
Mass of Hydrogen gas required to react : 0.936 g
<h3>Further explanation</h3>
Reaction on Nitrogen gas and Hydrogen gas to produce Ammonia gas
N₂ (g) + 3 H₂ (g) ⇒ 2 NH₃ (g)
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol
so mol Nitrogen for 3.5 L at STP :
From the equation, mol ratio of N₂ : H₂ = 1 : 3, so mol H₂ :
then mass of Hydrogen(MW= 2 g/mol) :
