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2 years ago

Suggest a name for a compound containing potassium, carbon and oxygen.

Chemistry

1 answer:

spin [16.1K]2 years ago

4 0

Answer:

Oxidation of potassium amalgam with carbon dioxide results in the formation of potassium oxalate. Potassium is not reactive with benzene, although heavier alkali metals such as cesium react to give organometallic products.

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The valance number of M is 3 . what is the formula of its phosphorus

lakkis [162]

The formula for phosphorus is P4

3 0

2 years ago

Calculate the mole fraction of the ionic species kcl in the solution.

sp2606 [1]

The question is incomplete, here is the complete question:

Calculate the mole fraction of the ionic species KCl in the solution A solution was prepared by dissolving 43.0 g of KCl in 225 g of water.

Answer: The mole fraction of KCl in the solution is 0.044

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For water:

Given mass of water = 225 g

Molar mass of water = 18 g/mol

Putting values in equation 1, we get:

$\text{Moles of water}=\frac{225g}{18g/mol}=12.5mol$

For KCl:

Given mass of KCl = 43 g

Molar mass of KCl = 74.55 g/mol

Putting values in equation 1, we get:

$\text{Moles of KCl}=\frac{43g}{74.55g/mol}=0.577mol$

Mole fraction of a substance is given by:

$\chi_A=\frac{n_A}{n_A+n_B}$

For KCl:

Moles of KCl = 0.577 moles

Total moles = [0.577 + 12.5] = 13.077 moles

Putting values in above equation, we get:

$\chi_{(KCl)}=\frac{0.577}{13.077}=0.044$

Hence, the mole fraction of KCl in the solution is 0.044

8 0

2 years ago

Which of the following did Malthus fail to take into consideration?

saveliy_v [14]

Answer: humans would find more efficient ways of growing crops

Explanation:

4 0

3 years ago

Read 2 more answers

How many moles are in 68 grams of potassium sulfide (K2S)?

luda_lava [24]

Answer:No of moles of potassium sulfide (K2S)=0.61671moles

Explanation:

No of moles is given as Mass/ molar mass

Here Mass of potassium sulfide (K2S) =68 grams

Molar mass of potassium sulfide (K2S) = 39.0983 x 2 + 32.065 =110.2616 g/mol

No of moles =68 grams /110.2616 g/mol

=0.61671moles

4 0

2 years ago

The settling rate of particulates in air is directly proportional to the square of their diameters (Stokes’ Law), provided that

Maksim231197 [3]

Answer:

It will take 12 hours to settle out same particulate with half the diameter from same chimney.

Explanation:

The settling rate of particulates = S

Diameter of the particulate = d

$S\propto d^2$

The settling rate of one type of particulates = $S_1$

Diameter of the one type of particulate = $d_1$

The settling rate of other type of particulates = $S_2$

Diameter of the other type of particulate = $d_2=0.5d_1$

$\frac{S_1}{(d_1)^2}=\frac{S_2}{(d_2)^2}$

$\frac{S_1}{(d_1)^2}=\frac{S_2}{(0.5d_1)^2}$

$S_1=4S_2$

$S_2=\frac{S_1}{4}$

Given that settling of one type of particulate from chimney is 2 days.So settling of other type of particulate from same chimney:

$S_2=\frac{2 days}{4}=0.5 days$

1 day = 24 hours

0.5 days = 0.5 × 24 hours = 12 hours

It will take 12 hours to settle out same particulate with half the diameter from same chimney.

4 0

3 years ago