1.694 L
Explanation:
First, solve for the number of moles of HCl in a 450-ml 3.2M solution:
# of mol HCl = (3.2 mol HCl/L)(0.450 L)
= 1.44 mol HCl
The molarity M is given by
M = (# of moles)/(volume in L)
Solving for the volume,
V = (# of moles)/M
= (1.44 mol HCl)/(0.85M)
= 1.694 L
Therefore, the 3.2M HCl solution must be diluted until its volume becomes 1.694 L.
Answer:
A suggested solution for an unexplained occurrence.
Explanation:
A hypothesis is an educated guess, because you don't know what will happen / what is going to happen, you are just making a guess on what you think will happen. It is a solution for an unexplained occurrence.
Answer is: 34,35 mL.
Reaction: Ca + 2H₂O → Ca(OH)₂ + H₂
m(Ca(OH)₂) = 98,5g.
n(Ca(OH)₂) = m÷M = 98,5g÷74g/mol = 1,33mol.
From reaction: n(Ca):n(Ca(OH)₂) = 1:1.
n(Ca) = n(Ca(OH)₂) = 1,33mol.
m(Ca) = n(Ca)·M(Ca) = 1,33mol·40g/mol = 53,24g.
d(Ca) = <span>1.55 g/mL.
V(Ca) = m(Ca)</span>÷d(Ca) = <span>53,24g</span>÷1.55 g/mL = 34,35 mL.
Answer:
0.375 moles of CaCO₃ are required
Explanation:
Given data:
Number of moles of sulfamic acid = 0.75 mol
Number of moles of calcium carbonate required = ?
Solution:
Chemical equation:
2H₃NSO₃ + CaCO₃ → Ca(SO₃NH₂)₂ + CO₂ + H₂O
Now we will compare the moles of H₃NSO₃ and CaCO₃ .
H₃NSO₃ : CaCO₃
2 : 1
0.75 : 1/2×0.75 = 0.375 mol
Thus, 0.375 moles of CaCO₃ are required.
Answer : The correct option is D.
Explanation :
Balanced chemical equation : It is defined as the mass or component of each atom should be equal on both sides of the equation.
The balanced chemical equation for the reaction of and is,
So, the correct option is D.