The answer is 4! Hope this Helps
This is where something called Graham's Law applies. Grahams law says that the rate of effusion is inversely proportional to the square root of the molar mass of a gas. What that means is that the less the molar mass of a gas is, the less quickly the gas effuses (effusion being the rate at which a gas can travel through a small hole). A great way to think about this is that effusion is thought about as though the gas is traveling through a small hole, so smaller particles would be able to go through it with greater ease than would a large particle. I don't know what particular sentences the question asks for are, but the answer should be that gas A (molar mass 4) has the greatest effusion rate, gas B (molar mass 16) has the second fastest effusion rate, and gas C (molar mass 32) has the slowest effusion rate.
That is metalic bonding.
That bonding is formed between the delocalized valence electrons in a metal and the ions of the metal (which are positive).
The delocalized electrons can move freely among the set of orbitals of neighbors atoms which is a characteristic of the metals.
Answer:
0.72 moles of hydrochloric acid are needed to completely react with 0.36 mol of lead.
Explanation:
The balanced reaction is:
Pb + 2 HCl → PbCl₂ + H₂
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reagent participate:
You can apply the following rule of three: if by stoichiometry of the reaction 1 mole of Pb reacts with 2 moles of HCl, 0.36 moles of Pb will react with how many moles of HCl?
amount of moles of HCl= 0.72 moles
<u><em>0.72 moles of hydrochloric acid are needed to completely react with 0.36 mol of lead.</em></u>
