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
Ivahew [28]
3 years ago
14

Which is a characteristic of calcium?

Chemistry
1 answer:
posledela3 years ago
4 0
The answer is D
Calcium has two electrons in its outer energy shell
You might be interested in
Plant cell synthesize energy rich organic molecules and later energy is released through the processes of
zmey [24]
Pretty sure its photosynthesis ?

7 0
3 years ago
How many grams of sodium carbonate are produced when 5.3 moles of sodium phosphate reacts with aluminum carbonate?
Korvikt [17]

Answer: There is 842.54 grams of sodium carbonate are produced when 5.3 moles of sodium phosphate reacts with aluminum carbonate.

Explanation:

Chemical equation depicting reaction between sodium phosphate and aluminum carbonate is as follows.

Al_{2}(CO_{3})_{3} + 2Na_{3}PO_{4} \rightarrow 2AlPO_{4} + 3Na_{2}CO_{3}

As this equation contains same number of atoms on both reactant and product side. So, this equation is a balanced equation.

According to the equation, 2 moles of sodium phosphate is giving 3 moles of sodium carbonate.

Therefore, sodium carbonate formed by 5.3 moles of sodium phosphate is as follows.

\frac{3}{2} \times 5.3 mol\\= 7.95 mol

As number of moles is the mass of substance divided by its molar mass. So, mass of sodium carbonate ( molar mass = 105.98 g/mol) is as follows.

No. of moles = \frac{mass}{molar mass}\\7.95 mol = \frac{mass}{105.98 g/mol}\\mass = 842.54 g

Thus, we can conclude that there is 842.54 grams of sodium carbonate are produced when 5.3 moles of sodium phosphate reacts with aluminum carbonate.

8 0
3 years ago
Calculate the fraction of acetic acid that is in the dissociated form in his solution. Express your answer as a percentage. You
Sliva [168]

Answer:

0.11%

Explanation:

Without mincing words, let us dive straight into the solution to the question/problem. The first step to solve this question is to write out the chemical reaction, that is the reaction showing the dissociation of acetic acid.

CH3COOH <=======================================> CH3COO⁻ + H⁺

Initially, the amount present in the acetic acid which is = 12M, the concentration for CH3COO⁻  and H⁺ is 0 respectively.

At equilibrium, the amount present in the acetic acid which is = 12 - x, the concentration for CH3COO⁻ = x  and H⁺ = x respectively. Note that the ka for acetic acid = 1.8 × 10⁻⁵.

1.8 × 10⁻⁵ = x²/ 14 - x. Therefore, x = 0.0158 M.

The next thing to do is to calculate for the percentage of dissociation, this can be done as given below:

percentage of dissociation = x/14 × 100. Recall that the value that we got for x = 0.0158 M. Hence, the percentage of dissociation = 0.0158 M/ 14m × 100 = 0.11%

7 0
2 years ago
Compared to an atom of C-12, an atom of C-14 has a greater
Vikentia [17]
 have<span> 6 electrons. i hope this answer helps 

</span>
7 0
3 years ago
What changes are happening to the particles as it changes state from a solid to a liquid?
Bingel [31]

Answer:

A

Explanation:

as something is heated, it gains kinetic energy

3 0
3 years ago
Other questions:
  • BRAINLIEST AND 30 POINTS! concept map for four types of intermolecular forces and a certain type of bond is shown.
    5·1 answer
  • The term Reuther Ford gave to the positively charged particles in the nucleus of an antom was
    14·1 answer
  • Which conclusion is best supported by the information?
    5·2 answers
  • For each of the following, use the periodic table to determine the number of valence electrons in an atom of the element.
    14·1 answer
  • Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-m
    11·1 answer
  • Which best explains the relationship between parent rock and soil<br><br> composition?
    9·1 answer
  • What is the product of the first beta decay in this series?
    5·1 answer
  • Define<br>Equivalent weight of a<br>Chemical substance​
    9·1 answer
  • What is the frequency of light that has an energy of 3.98 x 10-18 J
    9·1 answer
  • How was Earth’s atmosphere changed during the Great Oxygenation Event?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!