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Yakvenalex [24]
3 years ago
9

The equation Mg(NO3)2(aq) + 2KOH(aq) --> Mg(OH)2 (s) + 2KNO3 (aq) is an example of which type of reaction? A) decomposition B

) Acid/Base C) Precipitation
Chemistry
1 answer:
damaskus [11]3 years ago
8 0

Answer:

C) Precipitation

Explanation:

Above reaction forms the precipitate of Mg(OH)_2(Magnesium Hydroxide). Hence, it is Precipitation reaction. This reaction is also known as Double displacement reaction.

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Calculate the freezing point of a solution made from 220g of octane (C Hua), molar mass = 114,0 gmol dissolved in 1480 g of benz
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Answer: Freezing point of a solution will be -1.16^0C

Explanation:

Depression in freezing point is given by:

\Delta T_f=i\times K_f\times m

\Delta T_f=T_f^0-T_f=(5.50-T_f)^0C = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte)

K_f = freezing point constant = 5.12^0C/m

m= molality

\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}

Weight of solvent (benzene)= 1480 g =1.48 kg

Molar mass of solute (octane) = 114.0 g/mol

Mass of solute (octane) = 220 g

(5.50-T_f)^0C=1\times 5.12\times \frac{220g}{114.0 g/mol\times 1.48kg}

(5.50-T_f)^0C=6.68

T_f=-1.16^0C

Thus the freezing point of a solution will be -1.16^0C

3 0
3 years ago
What are the two processes of ocean to cloud?
IceJOKER [234]

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Fill in the blank, please help. (55 points)
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A sample of gas occupies 10.0 l at 100.0 torr and 27.0
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The pressure  of a sample  of a gas if the temperature  is changed  to 127  c  while  the volume  remains  constant   is calculated  using gay lussac law formula

that is P1/T1 = P2/V2
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=100  x 400/300 = 133.3 torr

5 0
3 years ago
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