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
saveliy_v [14]
2 years ago
5

12-How many elements are in the mixture pictured below? A-7 O B-4 C-3 D-2

Chemistry
2 answers:
STALIN [3.7K]2 years ago
8 0

The answer is 3

The elements are red, black, and blue!

vovikov84 [41]2 years ago
4 0

Answer:

C

Explanation:

3

Because you don't count the dots. You count how many colors there are. Which are Blue, Red, and Black.

Hope this helped!

You might be interested in
How many grams of NaOH are<br> needed to make 400. mL of<br> 1.50 M solution?
juin [17]

Answer:

24g of NaOH are required

Explanation:

Molarity, M, is an unit of concentration widely used in chemistry defined as the ratio between moles of solute (In this case, NaOH), and volume of solution in liters.

We can find the moles of NaOH and its mass with the volume and desired concentration as follows:

<em>Moles NaOH:</em>

400.0mL = 0.400L * (1.50mol / L) = 0.600 moles NaOH

<em>Mass NaOH -Molar mass: 40.0g/mol-:</em>

0.600 moles * (40.0g / mol) =

<h3>24g of NaOH are required</h3>
7 0
3 years ago
6. What is the atomic number of the element?
zheka24 [161]

Answer:

For O: atomic number = 8 # neutrons = 8

For Al: atomic mass = 27, # electrons = 13

7 0
3 years ago
To make a 2.0-molar solution, how many moles of solute must be dissolved in 0.50 liters of solution?
attashe74 [19]
Moles = Molarity x Volume

Moles = 2.0 x 0.50

= 1.0 mole

hope this helps!

4 0
2 years ago
Calculate the energy(J) change associated with an electron transition from n=2 to n=5 in a Bohr hydrogen atom. Put answer in sci
Oliga [24]
The energy at n level of hydrogen atom energy level =13.6/n^2

substiture the respective n values in the equation above and find the difference in the energy levels

instagram : imrajsingh

gimme a follow^ :)
3 0
3 years ago
Read 2 more answers
What type of ions do metals naturally form? Negative ions, by gaining electrons to fill the valence shell Negative ions, by losi
Mila [183]

Answer: Option (d) is the correct answer.

Explanation:

Metals are the species which contain more number of electrons.

When a specie loses electrons then it acquires a positive charge. Whereas when an atom gains electrons then it acquires a negative charge.

Thus, as metals have more number of electrons, therefore, in order to gain stability metals readily lose electrons.

Hence, metals naturally form positive ions, by losing electrons to empty the valence shell.

6 0
2 years ago
Read 2 more answers
Other questions:
  • I need help !!!!!!!!!!! Plz
    9·1 answer
  • Many manufacturing processes involve chemical reactions that reach equilibrium. Why would chemists adjust conditions to favor th
    5·2 answers
  • Which cell structure most resembles the human nervous system?
    15·2 answers
  • How many moles of MgO are produced when .250 mol of Mg reacts completely with O2
    10·1 answer
  • Hydrogen may not be advantagous as a fuel because-------
    15·1 answer
  • Two grams of potassium chloride are completely dissolved in a sample of water in a beaker.this solution is classified as
    11·1 answer
  • Why does table salt dissolve more rapidly than rock salt
    14·2 answers
  • How many neutrons does Mn have?
    14·2 answers
  • Describe the reactions during the electrolysis of water in an electrolytic cell. Group of answer choices Oxygen and hydrogen are
    13·1 answer
  • The picture provided shows the arrangement of electrons in atomic shells around the nucleus of four different elements.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!