Answer:
0.22
Explanation:
Given, Mass of
= 46.85 g
Molar mass of
= 299.4 g/mol
The formula for the calculation of moles is shown below:
Thus,
Given, Mass of
= 125.5 g
Molar mass of
= 46.07 g/mol
The formula for the calculation of moles is shown below:
Thus,
So, according to definition of mole fraction:

You have molarity and you have volume. Use the formula :
Molarity(M)= Moles(N)/Liter(L) to get the solution.
450 ml= .450 L
.250 = N/.450
N=.1125 moles of NaOH.
And since you know the moles, use the molar mass to figure out the grams.
<span> (40g/mol NaOH) x (.1125 mol) =
4.5g of NaOH.
</span>
Hope it helps. Good luck on chemistry.
A. p block
from 3a-8a are in the p block including halogen
Answer:1.4
Explanation:
Angle of incidence= 38°
Angle of refraction=26.3°
From Snell's law: n= sin i/sinr
sin i= 0.6157
sin r= 0.4430
n= 0.6157/0.4430=1.4
Note, n is dimensionless