Answer:
The total volume of the buffer is 75,0mL
Explanation:
A buffer is a mixture of a weak acid with its conjugate base or a weak base with its conjugate acid.
The buffer than Stu and Doc made is:
CH₃COOH ⇄ CH₃COO⁻ + H⁺
Doc add 30.0 mL of 0.0635 M CH₃COOH while Stu add 45.0 mL of 0.0285 M NaCH₃COO (CH₃COO⁻)
Thus, the total volume of the buffer is:
30,0mL + 45,0mL =<em> 75,0 mL</em>
I hope it helps!
Hello!
To know how many grams of
Ammonium Chloride ( a solid) you'll need to make 1.50 L of a 0,01 M solution you'll need to use the definition of molar concentration (M=mol/L) in the following way:

So, you'll need to dissolve
0,8023 g of Ammonium Chloride in 1,5 L of water to make this solution.
Have a nice day!
The reaction between zinc and silver nitrate is

Moles of Zn = m /M = 599 /65 = 9.2 mol
Moles of AgNO3 = m /M = 1500 /169 = 8.87 mol
Silver nitrate is reacting completely to give silver
Thus, moles of Silver nitrate is equivalent to silver = 8.87
For mass of silver produced
m /M = 8.87 = m /107
m = 949.24 g
Hence, the given quantity of reactants are sufficient to produce 800 g of silver as the amount of silver produced is 949.24 g
If it is already balanced because the compounds aluminum(Al) and oxygen(O) have the same number of atoms
Answer:
Molecules are made of two or more atoms
Molecules range in size
Molecules are made of atoms of the same element or different elements.