Answer:
the molarity of MgCl2 = 6.073 x 10^-2 M
Explanation:
Molarity = mole (n) divided by volume of solution (V) in liter = n/v
mole (n) = mass (m) divided by molecular mass (Mm) = m/Mm
n of MgCl2 = 2.891/95.3 = 0.03033 mole
v of solution = 500 ml = 0.500 L
Molarity = n/v = 0.03033/0.500 = 0.06066 M = 6.07 x 10^-2 M
Answer:
37%
Explanation:
From the question, the equation goes does.
C2H6+ (1-x)+a(O2+3.76N2)=bC02 + cH2O + axO2 + 3.76dN2.
Mair=Mair/Rin
( MN)O2 + (MN)N2÷ (MN)O2 + (MN)N2 +(MN)C2H6.
33 . 3.25(1-x) + 28 × 13.16(1-x) ÷ 33 × 3.25(1-x) + 28 × 13.16(1-x). + 30.1
= 176/176+8
X= 0.37
0.37 × 100
X= 37%
Answer:
Theoretical yield is 10.0g of HF.
Explanation:
Theoretical yield is defined as the yield of a reaction assuming a 100%.
In the reaction:
SiF₄(s) + 2H₂O(l) → 4HF(aq) + SiO₂(s)
2 moles of water produce 4 moles of HF.
4.51g of H₂O are:
4.51g ₓ (1mol/18.02g) = 0.250moles of water. Moles of HF:
0.250moles H₂O ₓ (4mol HF/2mol H₂O) = 0.500mol HF
In grams:
0.500mol HF ₓ (20.01g / 1mol) = <em>10.0g of HF - theoretical yield-</em>
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I hope it helps!
Answer:
Sublimate
Explanation:
The solid obtained at the neck of a funnel in sublimation is called the sublimate.
This substance is a solid.
- Sublimation process is a phase change.
- In this process, a solid is directly changed to gas or gas changed to solid.
- Heat must be added to change the solid to gas and heat removed for the reverse process.
- Not all substances have this capability.
The possible equation for the reaction that occurs when potassium hydroxide and nickel(II) bromide solutions are mixed was 2 KOH(aq)+NiBr₂(aq) → Ni(OH)₂(s)+2 KBr(aq).
The equation of the reaction between potassium hydroxide and nickel(II) bromide solutions when this two chemical are mixed are 2 KOH(aq)+NiBr₂(aq) → Ni(OH)₂(s)+2 KBr(aq).