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
s2008m [1.1K]
2 years ago
10

What is the number of valence electrons in a calcium atom? * 8 2 18 20​

Chemistry
1 answer:
hoa [83]2 years ago
4 0

Answer:

2

Explanation:

You might be interested in
If you can solve both<br> Will mark brainly<br> ASAP
MrRa [10]

Answer:

The main function sis the 2nd one and the substance provides the first 1.

Explanation:

Hope you finish the rest on your own, have fun!

7 0
3 years ago
Sugar dissolved completely in water to form a solution. The solution is a ?<br><br> pleasee help
aksik [14]

Answer:

the mixture or solution is called homogeneous mixture

4 0
3 years ago
Chemistry Questions: Which of the following is a reasonable ground-state electron configuration?
Fudgin [204]
A ground state electron configuration follows the Aufbau Principle that states that electrons should be filled up in orbitals in increasing energy. In the given sequences, the right configuration is 
<span>1s2 2s2 2p6 3s2 3p6 4s2 3d8. 

2) the possible confirmation that follows Aufbau's principle is
D. </span><span>-[Kr] 5s24d105p3</span>
5 0
2 years ago
What is the standard heat of reaction for the following reaction?
8090 [49]

Answer:

The correct answer to the question is

The standard heat of reaction for the reaction is

a. 216.8 kJ released per mole

Explanation:

The heat of reaction is given by [Heat of formation of products] - [Heat of formation of reactants]

In the question we have, heat of formation of the products Zn+2 (aq) = -152.4 kJ/mole and the heat of formation of the reactants = 64.4 kJ/mole

Therefore, the heat of formation of the reaction = (-152-64.4) kJ/mole or

-216.8 kJ/mole released

5 0
3 years ago
What is the density of a substance that has a mass of 42.8 g and a volume of 2.0 cm^3?
Misha Larkins [42]

Answer:

21.4

Explanation:

Mass = M/V

42.8/2.0 = 21.4

:)

7 0
2 years ago
Other questions:
  • The volume of a gas is 650.ml at 1.14celsius what will the volume be at 75.0 Celsius?
    12·1 answer
  • How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen
    5·1 answer
  • 6 Fe2+ (aq) + Cr2O72− (aq) + 14 H+ (aq) → 6 Fe3+ (aq) + 2 Cr3+ (aq) + 7 H2O (aq) If the titration of 23 mL of an iron(II) soluti
    5·1 answer
  • A buffer solution contains 0.11 mol of acetic acid and 0.13 mol of sodium acetate in 1.00 L. What is the pH of this buffer?
    7·1 answer
  • Name the intermolecular force in the compound N = O
    6·1 answer
  • Oxygen's electronegativity value is between those of sulfur and fluorine. Which statement correctly describes the relationship b
    7·1 answer
  • How are the particles in this model different from real gas particles
    8·1 answer
  • Properties that can be seen through direct observation are called
    14·1 answer
  • My sporty mini van needs 19,126 kJ of energy in order to pass a fast moving street sweeper on the road. Using the following equa
    6·1 answer
  • One question from Gases quiz
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!