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
Alex17521 [72]
3 years ago
13

What is the formal charge on the hydrogen atom in hbr? use the periodic table as needed?

Chemistry
1 answer:
Westkost [7]3 years ago
3 0
A covalent bond is formed between H and Br
The structure of HBr is as follows
H —Br
Formal charge for atoms are the charges for individual atoms in compounds.
Formal charge can be calculated as follows ;
Formal charge of atom = number of valence electrons -( number of bonds + number of lone pair electrons)
H has 1 valence electron, 1 bond and 0 number of lone pair electrons
Formal charge of H = 1 -1 -0 = 0
H has 0 charge
You might be interested in
A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the followi
Shalnov [3]

Answer: The percentages of carbon and hydrogen numerically to four significant figures is 83.33\% and 16.67\% respectively.

Explanation:

Molar mass of the compound is the mass of 1 mole of compound which is the sum of masses of each element.

Mass of 1 mole of compound= mass of carbon + mass of hydrogen+ = 5(12) + 12(1)= 72 g.

a) Percentage by mass of carbon =\frac{\text {mass of carbon}}{\text {Total mass}}\times 100\ %

Percentage by mass of carbon =\frac{60}{72}\times 100\%=83.33\%

b) Percentage by mass of hydrogen =\frac{\text {mass of hydrogen}}{\text {Total mass}}\times 100\ %

Percentage by mass of hydrogen =\frac{12}{72}\times 100\%=16.67\%

5 0
3 years ago
Why is measuring the size of an atom difficult
vlada-n [284]
<span>Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. Atomic size is difficult to measure because it has no definite boundary. The electrons surrounding the nucleus exist in an electron cloud.
</span>
5 0
3 years ago
Can anyone do this. i dont get it​
Flauer [41]
13. Nt
14. St
15. St
16. At
17. Nt
3 0
3 years ago
The mass fractions of a mixture of gases are 15 percent nitrogen, 5 percent helium, 60 percent methane, and 20 percent ethane wi
Setler79 [48]

Answer:

Explanation:

mass fraction N₂ : He : CH₄ : C₂H₆ : : 15 : 5 : 60 : 20

mole fraction  N₂ : He : CH₄ : C₂H₆ : : 15/28 : 5/4 : 60/16 : 20/30

mole fraction  N₂ : He : CH₄ : C₂H₆ : : .5357  : 1.25 : 3.75 : .67

Total mole fractions = .5357 + 1.25 + 3.75 + 0.67 = 6.2057

mole fraction of N₂ =  .5357 / 6.2057 = .0877

mole fraction of He = 1.25 / 6.2057 = .20

mole fraction of CH₄ = 3.75 / 6.2057 = .6043

mole fraction of C₂H₆ = .67 / 6.2057 = .108

Partial pressure = total pressure x mole fraction

Partial pressure of N₂ = 1200 kPa  x .0877 = 105.24 kPa

Partial pressure of He = 1200 kPa  x .20  = 240 kPa

Partial pressure of CH₄ = 1200 kPa  x  .6043  = 725.16 kPa

Partial pressure of C₂H₆ = 1200 kPa  x .108    = 129.6 kPa

6 0
3 years ago
Convert 27.7 kilometers to centimeters.
Stolb23 [73]

Answer:

The correct answer is - 2770000 cm.

Explanation:

1 kilometer = 1000 meter

1 meter = 100 centimeter

1 kilometer = 100*1000 cm

1 km = 100000 cm.

then,

27.7 kilometers = 2.77 × 10^6 centimeters

So, 27.7 kilometers = 27.7 × 100000

= 2.77 × 106 or 2770000 centimeters.

7 0
2 years ago
Other questions:
  • Which has greater precision, the 10 ml graduated cylinder or the 50 ml graduated cylinder?
    15·1 answer
  • Which macromolecules were present in the milk?
    5·1 answer
  • You are on an island and need freshwater to drink. Which process could you
    11·1 answer
  • Consider a hypothetical reaction in which a and b are reactants and c and d are products. if 25 grams of a completely reacts wit
    7·1 answer
  • * giving stars and thanks *
    5·2 answers
  • What two stereoisomeric alkanes are formed in the catalytic hydrogenation of (Z)-3-methyl-2-hexene? Draw and label the alkanes.
    11·1 answer
  • If a man has a mass of 83 kilograms on Earth, what will the force of gravity on his body be on the moon?
    5·1 answer
  • What is the definition of the fugacity coefficient for a pure component, and its condition at the ideal gas state?
    15·1 answer
  • How would removing invasive species from an
    6·1 answer
  • Question 2 (20 points)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!