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
Triss [41]
3 years ago
5

Electronegativity is defined as a measure of the tendency of atoms to attract electrons in a chemical bond.

Chemistry
1 answer:
stira [4]3 years ago
4 0
True.......................................
You might be interested in
El petróleo crudo, es decir, en estado natural,
Yanka [14]
Hey how are you can you help me with my quiz?
6 0
3 years ago
What are some of the global effects of a volcanic eruption?​
EleoNora [17]

Answer:

<h2>People loose their homes</h2>

Explanation:

<em><u>Because of the lava that exploded, it may touch a house which may burn the house</u></em>

4 0
3 years ago
Read 2 more answers
Which of the following best describes temperature?
Nookie1986 [14]

Answer:

b

Explanation:

because motions make things hotter

6 0
3 years ago
Read 2 more answers
Water that flows from behind a large dam can cause machines to produce electricity. What change takes place? Question 6 options:
yaroslaw [1]
The answer is: Mechanical energy s used to produce electrical energy. I took the test hope this helps :)

6 0
3 years ago
Read 2 more answers
A 5.000 g mixture contains strontium nitrate and potassium bromide. Excess lead(II) nitrate solution is added to precipitate out
scZoUnD [109]

<u>Answer:</u> The mass percent of potassium bromide in the mixture is 9.996%

<u>Explanation:</u>

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

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

<u>For lead (II) bromide:</u>

Given mass of lead (II) bromide = 0.7822 g

Molar mass of lead (II) bromide = 367 g/mol

Putting values in equation 1, we get:

\text{Moles of lead (II) bromide}=\frac{0.7822g}{367g/mol}=0.0021mol

  • The chemical equation for the reaction of lead (II) nitrate and potassium bromide follows:

2KBr+Pb(NO_3)_2\rightarrow PbBr_2+2KNO_3

By Stoichiometry of the reaction:

1 mole of lead (II) bromide is produced from 2 moles of potassium bromide

So, 0.0021 moles of lead (II) bromide will be produced from = \frac{2}{1}\times 0.0021=0.0042mol of potassium bromide

  • Now, calculating the mass of potassium bromide by using equation 1, we get:

Molar mass of KBr = 119 g/mol

Moles of KBr = 0.0042 moles

Putting values in equation 1, we get:

0.0042mol=\frac{\text{Mass of KBr}}{119g/mol}\\\\\text{Mass of KBr}=0.4998g

  • To calculate the percentage composition of KBr in the mixture, we use the equation:

\%\text{ composition of KBr}=\frac{\text{Mass of KBr}}{\text{Mass of mixture}}\times 100

Mass of mixture = 5.000 g

Mass of KBr = 0.4998 g

Putting values in above equation, we get:

\%\text{ composition of KBr}=\frac{0.4998g}{5.000g}\times 100=9.996\%

Hence, the percent by mass of KBr in the mixture is 9.996 %

5 0
3 years ago
Other questions:
  • what is the new pressure acting on a 2.5 l balloon if its original volume was 5.8 l at 3.7 ATM of pressure
    5·1 answer
  • Combustion analysis of toluene, a common organic solvent, gives 5.86 mg of co2 and 1.37 mg of h2o. if the compound contains only
    7·2 answers
  • A gas is contained in a thick-walled
    8·1 answer
  • A 92.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 46.0 ml of koh at 25 ∘c.
    5·1 answer
  • Which phrase best describes a covalent bond?
    8·1 answer
  • PLs help mweee Ill mark brainliest
    10·1 answer
  • Help please!!
    6·2 answers
  • Write any three possible structures for octane,C8H18,and give their iupac names.
    9·1 answer
  • Please answer. I will be picking the brainiest answer as well!
    9·1 answer
  • How many grams are in 4 5 moles of sodium fluoride naf
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!