Answer:
0.005404 M
Explanation:
Since you added an excess of sodium carbonate you warrantied that all the in the sample reacted with it. So we can say that the insoluble lead (II) carbonate contains all the ions in the original sample.
The moles of are:
One mol of is required to form one mol of . So, the stoichiometric relationship between them is 1:1.
Knowing this, 0.00054 is also the number of moles of in the original sample.
So, the concentration of in the original sample is:
Answer : The volume of solution will be, 0.309 L
Explanation : Given,
Mass of = 449.4 g
Molar mass of = 132 g/mole
Concentration = 11 M
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :
Now put all the given values in this formula, we get:
Therefore, the volume of solution will be, 0.309 L
Life is what this is called and your welcome
Answer:
N2 (but the 2 is a subscript) i think
Explanation:
i looked it up
When copper (ii) oxide is heated in presence of hydrogen gas it produces copper metal and water vapor.
that is
CuO + H2 = Cu + H2O
The moles of copper metal produced is calculated as below
find the moles of CUO used
moles = mass/molar mass
=5.6/79.5 =0.07 moles
by use of mole ratio between CUO:Cu which is 1:1 the moles of Cu is also
=0.007 moles of Cu