Answer:
21.3 g of CaCl₂ are produced in this reaction
Explanation:
Reaction is this:
CaCO₃ + 2HCl → CaCl₂ + H₂CO₃
Molar mass salt : 100.08 g/m
Molar mass acid: 36.45 g/m
We have 28 g / 100.08 g/m = 0.279 moles of CaCO₃
We have 14 g / 36.45 g/m = 0.384 moles of HCl
Ratio is 1:2, so 0.279 moles of salt will need the double of moles of acid.
0.279 . 2 = 0.558 moles of acid needed. (I have only 0.384 moles, so the acid is the limiting reactant)
0.384 moles of HCl produce the half of moles of CaCl₂ (This ratio is 1:2) --> 0.192 moles
Molar mass of CaCl₂ = 110.98 g/m
Mol . molar mass = mass → 0.192 m . 110.98 g/m = 21.3 g
Answer:
Avogadro's law, a statement that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules.
We have to get the maximum number of electrons in an atom that can have the given quantum numbers.
(a) The maximum number of electrons in an atom that can have quantum number n = 5, l = 3, 
= +3 is 2 (two).
(b) The maximum number of electrons in an atom that can have quantum number n = 3, l = 1, = -1 is 2 (two).
Here, n= principal quantum number, l= azimuthal quantum number and = magnetic quantum number.
l= 0 to (n-1) and = -l to +l including 0.
(a) n = 5, l = 3, = +3, this set of quantum number represents one 5f orbital which can contain maximum two electron of opposite spins.
(b) n = 3, l = 1, = -1, this set of quantum number represents one 3p orbital which can contain maximum two electron of opposite spins.
Answer:
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Answer:
11.31 g.
Explanation:
Molarity is defined as the no. of moles of a solute per 1.0 L of the solution.
M = (no. of moles of solute)/(V of the solution (L)).
<em>∴ M = (mass/molar mass)of NaCl/(V of the solution (L)).</em>
<em></em>
<em>∴ mass of NaCl remained after evaporation of water = (M)(V of the solution (L))(molar mass)</em> = (0.45 M)(0.43 L)(58.44 g/mol) = <em>11.31 g.</em>
