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
Arisa [49]
3 years ago
14

Determing Valence Electrons

Chemistry
1 answer:
ioda3 years ago
6 0
Gallium ( Ga ) is the answer
You might be interested in
A hypothetical element has an atomic weight of 48.68 amu. It consists of three isotopes having masses of 47.00 amu, 48.00 amu, a
Morgarella [4.7K]

Answer : The percent abundance of the heaviest isotope is, 78 %

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i

As we are given that,

Average atomic mass = 48.68 amu

Mass of heaviest-weight isotope = 49.00 amu

Let the percentage abundance of heaviest-weight isotope = x %

Fractional abundance of heaviest-weight isotope = \frac{x}{100}

Mass of lightest-weight isotope = 47.00 amu

Percentage abundance of lightest-weight isotope = 10 %

Fractional abundance of lightest-weight isotope = \frac{10}{100}

Mass of middle-weight isotope = 48.00 amu

Percentage abundance of middle-weight isotope = [100 - (x + 10)] %  = (90 - x) %

Fractional abundance of middle-weight isotope = \frac{(90-x)}{100}

Now put all the given values in above formula, we get:

48.68=[(47.0\times \frac{10}{100})+(48.0\times \frac{(90-x)}{100})+(49.0\times \frac{x}{100})]

x=78\%

Therefore, the percent abundance of the heaviest isotope is, 78 %

5 0
3 years ago
Read 2 more answers
A mercury thermometer is used to take four temperatures of a solution
anastassius [24]

Answer:

scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

7 0
3 years ago
A fecal transplant can work to cure a patient infected with a very harmful bacteria, such as C. difficile.
Dmitrij [34]

Answer:  Bacteria from the fecal transplant can fill up the space in the gut, limiting the food and space for invading harmful bacteria.fecal transplants may be best answer to antibiotic-resistant bacteria: Non-pharmaceutical treatment combats recurring Clostridium Difficile infections

Explanation:

4 0
3 years ago
Please help me with this.
zlopas [31]

Answer A: Connect a wire coil to an ammeter. Move a bar magnet into and out of the wire coil as you observe the ammeter.

6 0
2 years ago
How to compare and contrast a solution of hydrogen chloriide gas in water and toluene?
Airida [17]
<span>The solute is the substance that is being dissolved while the solvent is the base that the solute is bring dissolved in. For example, in salt water, salt would be the solute that dissolves into the water, and the water is the solvent that the salt is being dissolved in.</span>
4 0
3 years ago
Other questions:
  • Which element is always present in a combustion reaction?
    7·2 answers
  • Why do you think matter changes state when outside forces act upon it?
    5·2 answers
  • What does frequency describe? A.distance from crest to crest or from trough to trough on a wave B.Number of waves that pass a gi
    7·1 answer
  • Calculate the molar mass of NH4NO3.
    14·1 answer
  • Analysis of an unknown compound reveals that the compound is 27.29% carbon and 72.71% oxygen. The molar mass of the compound is
    15·1 answer
  • The cell reaction for a lead storage battery (car batteries, etc.) is: E° = 1.92 V. Pb(s) + PbO2(s) + 2 H+(aq) + 2HSO4-(aq)--&gt
    14·1 answer
  • Magnesium bromide is prepared in a laboratory using the reaction below. Typically, the magnesium bromide is recoveted as a solid
    5·1 answer
  • Aqueous magnesium chloride is added to aqueous silver nitrate. A white precipitate forms. Write the chemical equation for this r
    7·2 answers
  • Hydrobromic acid, HBr, is a strong acid. Hydrofluoric acid, HF, is a weak acid. If you prepared equal
    7·1 answer
  • What is the coordination number for atoms that pack within the diamond cubic crystal structure?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!