In chemistry and phase equilibria, phase transition is a common phenomenon. There are many terms related to the phase transition. The process deposition is a physical process. This process is the opposite of sublimation.
Deposition is a phase transfer or phase transition process in which a substance in the gaseous state changes directly to the solid state. Freezing of air is an example of deposition in which the water vapour directly changes to ice.
Here the gaseous state converts into solid state without being in the liquid state.
An example is:
CO₂ (g) → CO₂ (s)
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b. 0.04.
c. 0.05.
d. 0.08
This question is based on the concept of percentage by mass. Therefore the value of x, concentration of unknown ethanol solution is 4% when 20 gallons of a known solution is used. Option b is correct option
Mass percentage represents the the percentage of each element that is making a particular compound. Mass percentage does not have any unit as numerator and denominator contains the same unit.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
According to the question the equation can be written as:
20× (x÷ 100) + 60×0.12 = 80× 0.10
x÷5 + 7.2 = 8
x÷ 5 = 0.8
x = 4%
concentration of unknown solution = 4%
Therefore, the value of x, concentration of unknown ethanol solution is 4% when 20 gallons of a solution is used. Option b is correct option
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the correct answer is B
true or false
B. limited the material in which natural selection can act upon.
C. increased genetic variation.
D. maintained the same gene combinations over time.
NH4OH
b
NaNO3
c
PbCrO4
d
SrSO4
e
K3PO4
f
AgClO4
g
HgCl2
h
FeCO3
i
NH4Br
j
Li2Cr2O7
FeCO₃ and PbCrO₄ is insoluble in water.
Explanation:
If any substance added to water and it form ions then it is soluble in water otherwise it is insoluble in water.
a. NH₄OH - soluble in water
b. NaNO₃ - soluble in water
C. PbCrO₄ is insoluble in water
d. SrSO₄ slightly soluble in water
e. K₃PO₄ - Soluble in water
f. AgClO₄- Highly Soluble in water
g. HgCl₂ - Slightly soluble in water
h. FeCO₃ - insoluble in water
i. NH₄Br - soluble in water
j. Li₂Cr₂O₇ - soluble in water
b. water
c.a tritant
d. an acid