1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yanka [14]
3 years ago
10

Number of different bond angles for pbr2f3

Chemistry
1 answer:
kupik [55]3 years ago
5 0
This is very confusing.
You might be interested in
The mass number of an atom is determined by ___.
Reika [66]
2: protons and neutrons
3 0
3 years ago
A mixture of A and B is capable of being ignited only if the mole percent of A is 6 %. A mixture containing 9.0 mole% A in B flo
atroni [7]

Explanation:

As it is given that mixture (contains 9 mol % A and 91% B) and it is flowing at a rate of 800 kg/h.

Hence, calculate the molecular weight of the mixture as follows.

             Weight = 0.09 \times 16.04 + 0.91 \times 29

                          = 27.8336 g/mol

And, molar flow rate of air and mixture is calculated as follows.

                    \frac{800}{27.8336}

                     = 28.74 kmol/hr

Now, applying component balance as follows.

                0.09 \times 28.74 + 0 \times F_{B} = 0.06F_{p}

                   F_{p} = 43.11 kmol/hr

                   F_{A} + F_{B} = F_{p}

                          F_{B} = 43.11 - 28.74

                                      = 14.37 kmol/hr

So, mass flow rate of pure (B), is F_{B} = 14.37 \times 29

                                                    = 416.73 kg/hr

According to the product stream, 6 mol% A and 94 mol% B is there.

             Molecular weight of product stream = Mol. weight \times 43.11 kmol/hr

                                  = 0.06 \times 16.04 + 0.94 \times 29

                                  = 28.22 g/mol

Mass of product stream = 1216.67 kg/hr

Hence, mole of O_{2} into the product stream is as follows.

                    0.21 \times 0.94 \times 43.11

                      = 8.5099 kmol/hr \times 329 g/mol

                      = 272.31 kg/hr

Therefore, calculate the mass % of O_{2} into the stream as follows.

                 \frac{272.31}{1216.67} \times 100

                     = 22.38%

Thus, we can conclude that the required flow rate of B is 272.31 kg/hr and the percent by mass of O_{2} in the product gas is 22.38%.

4 0
3 years ago
A solution of HCOOH has 0.16M HCOOH at equilibrium. The Ka for HCOOH is 1.8×10−4. What is the pH of this solution at equilibrium
kotykmax [81]

Answer:

pH=2.28

Explanation:

Hello,

In this case, for the acid dissociation of formic acid (HCOOH) we have:

HCOOH(aq)\rightarrow H^+(aq)+HCOO^-(aq)

Whose equilibrium expression is:

Ka=\frac{[H^+][HCOO^-]}{[HCOOH]}

That in terms of the reaction extent is:

1.8x10^{-4}=\frac{x*x}{0.16-x}

Thus, solving for x which is also equal to the concentration of hydrogen ions we obtain:

x=0.00528M

[H^+]=0.00528M

Then, as the pH is computed as:

pH=-log([H^+])

The pH turns out:

pH=-log(0.00528M)\\\\pH=2.28

Regards.

7 0
4 years ago
What are three other elements that have 8 valance electrons.
Rina8888 [55]
8 valence electrons means that the element is stable. When we hear stable, we know the group to look at! Noble gases all have 8 valence electrons making them stable and have a full octet. 

Here are some:-

Krypton
Argon
Neon
5 0
3 years ago
Read 2 more answers
What does diatomic mean?
Tanya [424]
Answer:  [A]:  "<span><span>two atoms, both the same element, bonded together</span>".
</span><span>_____________________________________________________________</span>
4 0
4 years ago
Other questions:
  • You burn a 1.5 g jellybean to warm 150 g of water. The temperature of the water increases by 15 °C. Water has a specific heat of
    7·1 answer
  • Why does the moon barely move over time and how could this answer be helpful or useful to people?
    7·1 answer
  • Which statement best describes an atom
    8·2 answers
  • Describe two human activities that can affect the water cycle.
    15·2 answers
  • If an automobile slows from 26 m/s to 18 m/s in a period of 4.0 s, what was the average acceleration? a. %005.7 m/s2 b. 4.0 m/s2
    15·2 answers
  • How many electrons are in an atom of elemental sodium?
    8·2 answers
  • Do carbon dioxide and water have the same molecular geometry? if not, what attributes cause these molecules with similar formula
    8·2 answers
  • Speeds up the reaction but does not change k
    12·1 answer
  • PLEASEEE HELP ME I AM REDOING MY CHEMISTRY UNIT TEST ON USATP (7TH GRADE) PLEASE HELP ME IF YOU KNOW ALL THE ANSWERS PLEASE LET
    10·2 answers
  • An amount 10.24 kcal of heat is added to a 35.0 g sample of a liquid at 25.00°C. The final temperature is 87.35°C. What is the s
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!