All categories

4 years ago

What is the arrangement of electron pairs of pbr3? predict the molecular shape of a pbr3 molecule?

Chemistry

1 answer:

mina [271]4 years ago

3 0

Check the attached file for the solution. The shape is in the next file.

You might be interested in

The normal boiling point of benzene is 80.1°C. What is its enthalpy of vaporization if the vapor pressure at 26.1°C is 100 torr?

Fofino [41]

The answer is, 33.0 kJ/mol

6 0

3 years ago

Read 2 more answers

How many molecules are in 4.0 mol h20

Leona [35]

4 moles of water will have 4 number of water molecules

7 0

3 years ago

When K2Cr2O7 is cooled from 80oC to 20oC, how much solute will precipitate out of the solution?

Setler [38]

Answer:

The amswer to the question is A

3 0

3 years ago

You have 4 moles of oxygen gas in a flask. 4 moles of helium gas is added. What happens to the total pressure of the gases in th

ASHA 777 [7]

Answer: The correct option is (c). The total pressure doubles.

Solution:

Initially, only 4 moles of oxygen gas were present in the flask.

$p_{O_2}=Tp_1\times X_{O_2}$ ( $X_{O_2}=\frac{4}{4}$ ) ( according to Dalton's law of partial pressure)

$p_{O_2}=Tp_1\times 1=Tp_1$ ....(1)

$Tp_1$ = Total pressure when only oxygen gas was present.

Final total pressure when 4 moles of helium gas were added:

$X'_{O_2}=\frac{4}{8}=\farc{1}{2},X_{He}=\frac{4}{8}=\frac{1}{2}$

partial pressure of oxygen in the mixture :

Since, the number of moles of oxygen remains the same, the partial pressure of oxygen will also remain the same in the mixture.

$p_{O_2}=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}$

$Tp_2$ = Total pressure of the mixture.

from (1)

$Tp_1=Tp_2\times X'_{O_2}=Tp_2\times \frac{1}{2}$

On rearranging, we get:

$Tp_2=2\times Tp_1$

The new total pressure will be twice of initial total pressure.

7 0

3 years ago

Hi everyone, I'm really stuck on a question for my uni assignment, i just dont understand chemistry at all, i was wondering if a

sdas [7]

<h3>Answer : 2C + 3H2 -> C2H6</h3>

<h3>Step and explanation</h3>

Condition : graphite + hydrogen gas

Chemical formula : C + H2

Reaction formula :

C + H2 -> C2H6

#First, you see the number of atom

•Product

C = 1

H = 2

•Reactant

C = 2

H = 6

#Note that, in a chemical reaction both number of each atom in product must be equal in reactant so, you think what number you need to put Infront of the chemical formula so that the number of atom equal

2C + 3H2 -> C2H6

#Now check again

•Product

C = 2

H = 6

•Reactant

C = 2

#Now, its equal. The bold one is the balance chemical reaction

<h3>Note (just incase u dont know)</h3>

Reactant -> product (the thing you get after reaction)

7 0

3 years ago