Answer:0.102 milliliters is required
Explanation:
The easy way to obtain this is to take unit conversation very important as diphenhydramine has a molar mass of 255.355grams per mole and the concentration of the liquid diphenhydramine is 12.5 milligrams per 5 milliliters.
We have to convert the molar mass into milligrams per mole by dividing by 1000 which yields 0.255355mg/mol then;
Simplify the molar mass divided by the concentration of the liquid diphenhydramine;
0.255355/12.5/5
This equals 0.102 milliliters!
Answer:
peux tu me donner plus de précisions stp concernant le détail de calcul que tu souhaite avoir ?
Explanation:
Answer: E
How much NH₃ can be produced from the reaction below:
N₂ + 3H₂ - 2NH₃
The stoichiometric ratio of the reactants = 1:3
Given
74.2g of N₂, and Molar mass = 14g/mole
Mole of N₂ = 74.2/14=5.3mols of N₂,
and 14mols of H₂
From this given values and comparing with the stoichiometric ratio, H₂ will be the limiting reagent while N₂ is the excess reactant.
i.e, for every 14mols of H₂, we need 4.67mols of N₂ to react with it to produce 9.33mols of NH₃ as shown (vice versa)
From this we have 9.33mols of NH₃ produced
Avogadro constant, we have n = no of particles = 6.022x10²³ molecules contained in every mole of an element.
For a 9.33mols of NH3, we have 9.33x6.022x10²³molecules in NH3
5.62x10²⁴molecules of NH₃
Pure substances is matter that cannot be separated into any other matter. Mixtures are a compound of different matter, and can be separated into different matter. Pure substances have a constant chemical properties, while mixtures have varying chemical properties.