Answer:
There are approximately 1.54 moles in a 275 g sample of 
.
Explanation:
To find out number of moles, fistly we have to calculate molecular mass of .
There are 2 atoms of Potassium 1 atom of Chromium and 3 atoms of oxygen in the given compound.
For molecular mass we have to add the value of mass of 2 atoms of Potassium with mass of 1 atom of Chromium and with mass of 3 atoms of oxygen.
Atomic mass of Potassium = 39
Atomic mass of Chromium = 52
Atomic mass of Oxygen = 16
Now,
Molecular mass of = 
The molecular mass of a compound is the mass of compound in one mole.
To find out the number of moles, we have to divide given mass of compound by its molecular mass.
Hence the number of moles in 275 gm of is 1.54.
Answer is: 8568.71 of baking soda.
Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.
V(H₂SO₄) = 17 L; volume of the sulfuric acid.
c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.
n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).
n(H₂SO₄) = 17 L · 3 mol/L.
n(H₂SO₄) = 51 mol; amount of sulfuric acid.
From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.
n(NaHCO₃) = 2 · 51 mol.
n(NaHCO₃) = 102 mol, amount of baking soda.
m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).
m(NaHCO₃) = 102 mol · 84.007 g/mol.
m(NaHCO₃) = 8568.714 g; mass of baking soda.
Answer:
The mass is 
Explanation:
From the question we are told that
The volume of oxygen produced is 
The temperature is 
The pressure is 
From the ideal gas law we have that
Where R is the gas constant with the value
n is the number of moles making it the subject of the formula
Substituting values
From the chemical equation
one mole of 
produces one mole of kCl and 
of oxygen
x mole of produces x mole of kCl and 
of oxygen
So 
Now the molar mass of KCl is a constant with a value
Now the mass of KCl is mathematically evaluated as
Substituting values
