A mole of gold contains a greater number of atoms
Answer:
The extinction coefficient is 4240 M⁻¹cm⁻¹
Explanation:
The Beer-Lambert law for the absorbance of a monochromatic light by a molecule is given by the following mathematical expression:
----------------------(1)
Here, E is the extinction coefficient, b is the length of light pathway through the solution and C is the concentration in mol/L. This is a linear equation and fits well with its formula
y = mx + C-------------------(2)
Here, m is the slope and C is the y intercept. y and x are the two variables. Comparing equation 1 and 2, Absorbance (A) and molar concentration (C) are the two variables, while the product of extinction coefficient (E) and path length (b) makes the slope of the line. The y-intercept in the given equation is due to the solvent interference.
From this information, we can determine the extinction coefficient by the slope of the line with the following formula.
The theoretical yield of Li3N is 20.9 g .
Based on the fact that the question mentions a change in pressure and the aim is to determine the change in volume, then it is evident that the premise of the question is Boyle's law (Pressure increase when Volume decrease and vice versa when the temperature remains constant). Thus Boyle's Equation can be used to determine the answer.
Boyle's Equation: P₁V₁ = P₂V₂
Since the initial pressure (P₁) is 0.428 atm, the final pressure (P₂) is 0.724 atm, the initial volume is 240 mL, then we can substitute these into the equation to find the final volume (V₂).
P₁V₁ = P₂V₂
∴ by substituting the known values,
⇒ (0.428 atm) (240 mL) = (0.724 atm) (V₂)
⇒ V₂ =
⇒ V₂ =
141.88 mLThus the final volume of the sample is approx.
141.88 mL
Answer:
An element would be fire, earth, water, or air. An atom would be everything we are made of
Explanation:
Fun fact: atoms never touch each other. Slap a kid technically you didn't even do it lol just kidding don't do that... without me. Have a blessed day!