Answer:
9.9 moles of CuF
Explanation:
Given data:
Number of molecules of CuF = 6.02×10²⁴
Number of moles of CuF = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
For CuF:
6.02×10²⁴ molecules× 1 mol / 6.022 × 10²³ molecules
0.99 ×10¹ mol
9.9 moles of CuF
Answer:
a) [Tris0] : [Tris] = 1 : 100
b) Range = 7.1 to 9.1
Explanation:
a) Calculation of ratio of the basic and the acidic forms of tris
pH of a buffer is calculate using Henderson-Hasselbalch equation
Conjugate acid of Tris dissociated as
For tris,
Salt or Basic form = tris0
Acid or Acidic form = Tris
pKa = 8.1
pH = 6.1
[Tris0] : [Tris] = 1 : 100
b) Range of Tris
Range of any buffer is:
From (pKa -1) to (pKa+1)
So, range of Tris is:
From (8.1 - 1) to (8.1 +1)
or from 7.1 to 9.1
Answer:
A. Oxygen is an element because its most basic unit is a single type of atom.
Explanation:
Oxygen is the chemical element with the symbol O and atomic number 8.
Mole=179.641
Number of molecules =mole×avogadros' number
179.641×6.02×10 exponent 23
=1.08144×10 exponent 26
I think that is the answer
Answer:
I believe Gases A and D
Explanation:
The lines in both gases match up with the lines in the unknown mixture.