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
marin [14]
3 years ago
15

Scandium 15. Write the nuclear symbol for an ion with a charge of +2,20 protons, and 24

Chemistry
1 answer:
Hoochie [10]3 years ago
8 0
If the element has a charge of +2 it has lost two electrons giving it an overall positive charge making it a cation. In order to find the number of electrons, take the elements atomic number and subtract two since it lost two electrons
You might be interested in
Calculate the molecular mass of N2O3​
Fynjy0 [20]

the answer is 76.01g/mol

and the density:1.4g/cm³

5 0
3 years ago
Calculate the standard potential for a cell that employs the over-all cell reaction: 2Al(s) + 3 I2(s)→2 Al+3 + 6 I- From reducti
Valentin [98]

Answer:

Explanation:

2Al(s) + 3 I₂(s)   →    2 Al⁺³    +     6 I⁻

Aluminium is oxidised and iodine is reduced .

so cell potential = Ereduction - Eoxidation

Al⁺³ + 3e = Al          -  1.66 V

I₂ + 2 e = 2 I⁻             0.54 V

=  .54 - ( - 1.66 )

= 1.66 + .54

= 2.2  V

8 0
3 years ago
Which statement about electrons is not true?a. One electron state is a bonding orbital between nucleib. One electron state is an
NemiM [27]

Answer:

b. One electron state is an anti-bonding orbital, which results in an absence of electron density between atoms.

Explanation:

8 0
4 years ago
Consider the following reaction mechanism:
snow_lady [41]

Answer:

  • <em><u>Step 2 (the slow step).</u></em>

Explanation:

The rate-determining step is always the slow step of a mechanism.

That is so, because it is the slow step which limits the reaction.

Imaging that for assembling a toy you have process of three steps:

  • 1. order ten pieces, which you can do in 1 minute: meaning that you can order order the pieces for 60/1 = 60 toys in 1 hour.

  • 2. glue the pieces and hold the toy until the glue hardens, which takes 1 hour: meaning finishingh 1 toy in 1 hour.

  • 3. pack the toy, which takes 2 minutes: meaning that you can pack 60/2 = 30 toys in one hour.

The time to glue and hold one toy until the glue hardens determines that you can assemble 1 toy in 1 hour and not 60 toys or 30 toys.

Thus, the step that determines the rate at which the reaction happens is the slowest step: step 2.

3 0
3 years ago
Read 2 more answers
4. Think of the solids and liquids that you encounter every day. In what ways are solids and liquids similar? In what ways are t
Taya2010 [7]

Answer:

They both are the same thing which is water but they are just in different forms.

Explanation:

A solid is water that is frozen and a liquid is just water.

3 0
2 years ago
Other questions:
  • From what are chemical sedimentary rocks formed?
    11·2 answers
  • If you start with 0.05 M O3 and 0.01 M NO and the reaction reaches completion in 16 seconds, what is the initial rate of this re
    15·1 answer
  • The calculated yield for water was 176 g but the measured yield what is 140 g what percent is the yield
    12·1 answer
  • With regards to a “Data (Age) Structure Diagram”, which of the following is an indicator of a rapidly growing population?
    13·1 answer
  • Urea, (NH2)2CO, is a product of metabolism of proteins. An aqueous solution is 37.2% urea by mass and has a density of 1.032 g/m
    11·1 answer
  • A key to gas exchange is that both CO₂ and O₂ flow along their respective concentration gradients (from high concentrations to l
    8·1 answer
  • Which molecule, when added to a solution, would give the solution the highest pH?
    9·1 answer
  • How can you tell, from the drawings, that gravity is greater on Earth
    8·2 answers
  • Blood vessels that take the blood back to your so it can be pumped back to the lungs.
    7·1 answer
  • What does every weak base have? ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!