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
Readme [11.4K]
2 years ago
5

Revise the following statement to make it true:

Chemistry
1 answer:
tino4ka555 [31]2 years ago
6 0

Answer:

All the individuals of a species living within a specific area are collectively called a population.

Explanation:

You might be interested in
What type of rock is chromium
pantera1 [17]
<span>an oxide of iron, magnesium, aluminum, and chromium</span>
7 0
3 years ago
Read 2 more answers
Which best describes the three general groups of elements?
Alex73 [517]

Answer:

D

Explanation:

3 0
3 years ago
How many atoms of O are there?
olga_2 [115]

Answer:

There are 4 atoms of O.

Explanation:

6 0
3 years ago
Read 2 more answers
Zinc is a pure substance. How could you make a mixture from a 1.0-g zinc disc?
anygoal [31]

Answer:

D)Coat the disc with another pure substance, such as copper.

Explanation:

To make a mixture of the zinc, simply coat it with another pure substance such as copper. This will result in a mixture.

What then is a mixture?

  • They are impure substances with indefinite composition.
  • They retain their physical properties
  • their constituents reacts differently to changed conditions
  • They can easily be separated into constituents by physical methods.

We can see that coating the copper on the zinc does not alter the physical properties of the metal.

Most times, the copper will wear off and leave behind the zinc.

The metal coated can easily be removed and this signifies just a physical mix.

8 0
3 years ago
Consider the dissolution of calcium hydroxide:
Crazy boy [7]

Answer:

1. K_eq = [Ca^{2+][OH^-]^2 = K_{sp}

2. a. No effect;

b. Products;

c. Products;

d. Reactants

Explanation:

1. Equilibrium constant might be written using standard guidelines:

  • only aqueous species and gases are included in the equilibrium constant excluding solids and liquids;
  • the constant involves two parts: in the numerator of a fraction we include the product of the concentrations of products;
  • the denominator includes the product of the concentrations of reactants;
  • the concentrations are raised to the power of the coefficients in the balanced chemical equation.

Based on the guidelines, we have two ions on the product side, a solid on the left side. Thus, the equilibrium constant has the following expression:

K_eq = [Ca^{2+][OH^-]^2 = K_{sp}

2. a. In the following problems, we'll be considering the common ion effect. According to the principle of Le Chatelier, an increase in concentration of any of the ions would shift the equilibrium towards the formation of our precipitate.

In this problem, we're adding calcium carbonate. It is insoluble, so it wouldn't have any effect on the equilibrium.

b. Sodium carbonate is completely soluble, it would release carbonate ions. The carbonate ions would combine with calcium cations and more precipitate would dissolve. This would shift the equilibrium towards formation of the products to reproduce the amount of calcium cations.                                      

c. HCl would neutralize calcium hydroxide to produce calcium chloride and water, so the amount of calcium ions would increase, therefore, the products are favored.

d. NaOH contains hydroxide anions, so we'd have a common ion. An increase in hydroxide would produce more precipitate, so our reactants are favored.

3 0
3 years ago
Other questions:
  • Dumbledore decides to gives a surprise demonstration. He starts with a hydrate of Na2CO3 which has a mass of 4.31 g before heati
    14·1 answer
  • The textbook procedure is asking you to dissolve 1 g of 3-nitrophthalic acid in hydrazine and only then to add the triethylene g
    6·1 answer
  • Help plz i dont get this formula
    9·2 answers
  • -
    8·1 answer
  • A_________is the distance from one compression to the next compression in a longitudinal wave. (Page 2 Vocabulary)
    12·1 answer
  • POINTS AND BRAINIEST ANSWER!!!!
    15·2 answers
  • If a gas is cooled from 315K to 231K and the volume is kept constant, what would the final pressure be if the original pressure
    14·1 answer
  • How to remember first 20 periodic table​
    10·1 answer
  • Where within the cell does the process of respiration take place?
    14·2 answers
  • What is the maximum number of grams of copper that could be produced by the reaction of 30.0 of copper oxide with excess methane
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!