0.05 liters of 0.40 M calcium chloride solution
Explanation:
We have the following chemical reaction:
Na₂CO₃ + CaCl₂= 2 NaCl + CaCO₃
Chalk is calcium carbonate CaCO₃.
number of moles = mass / molecular weight
number of moles of CaCO₃ = 2 / 100 = 0.02 moles
From the chemical reaction we see that 1 mole of calcium chloride (CaCl₂) produces 1 mole of calcium carbonate (CaCO₃), so to produce 0.02 moles of calcium carbonate (CaCO₃) we need 0.02 moles of calcium chloride (CaCl₂).
molar concentration = number of moles / volume (L)
volume = number of moles / molar concentration
volume of calcium chloride solution = 0.02 / 0.4 = 0.05 liters
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molar concentration
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Mass = 35.0 g
density = 1.036 g/cm³
volume = ?
therefore:
D = m / V
1.036 = 35.0 / V
V = 35.0 / 1.036
V = 33.784 cm³
answer D
Atomic mass S = 32.0 a.m.u
1 mole S ------------- 32.0 g
0.300 moles S ------ ??
0.300 x 32.0 / 1 => 9.6 g of S
27.33 I think so I’m not sure
Answer:
Pure iron is impermeable to air and water, so True.
Explanation:
When corroding, the oxide layer becomes permeable, but water and air cannot pass through pure iron.
I hope this helps! :)