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
finlep [7]
3 years ago
14

What is the percent by mass of oxygen in Ca(OH)2 ?

Chemistry
1 answer:
Leya [2.2K]3 years ago
7 0

Answer:

The answer to your question is Percent by mass = 43.2

Explanation:

Data

Ca(OH)₂

Percent by mass of Oxygen = ?

Process

1.- Calculate the molecular mass of Ca(OH)₂

    Ca(OH)₂ = (40 x 1) + (16 x 2) + (2 x 1)

                   = 40 + 32 + 2

                   = 74 g

2.- Calculate the mass of Oxygen = (16 x 2)

                                                        = 32 g

3.- Calculate the percent by mass

      Percent by mass = (mass of oxygen/mass of Ca(OH)₂) x 100

      Percent by mass = (32/74) x 100

      Percent by mass = 43.2

You might be interested in
The standard enthalpy of formation (ΔHf°) of calcium carbonate is –1207 kJ/mol. Which ONE of the equations below has ΔH° = –1207
Art [367]

Answer:

A) Ca(s) + C(s) + 3/2 O₂(g) → CaCO₃(s)

Explanation:

Standard enthalpy of formation of a chemical is defined as the change in enthalpy durin the formation of 1 mole of the substance from its constituent elements in their standard states.

The consituent elements of calcium carbonate, CaCO₃, in their standard states (States you will find this pure elements in nature), are:

Ca(s), C(s) and O₂(g)

That means, the equation that represents standard enthalpy of CaCO₃ is:

<h3>A) Ca(s) + C(s) + 3/2 O₂(g) → CaCO₃(s)</h3><h3 />

<em>Is the equation that has ΔH° = -1207kJ/mol</em>

3 0
3 years ago
How many significant figures are in the following number? 0.000485
aliina [53]

Answer:

4 or 3

Explanation:

8 0
3 years ago
Read 2 more answers
Which of the following has the smallest atomic radius: Mg2+, Mg, Ca2+, or Ca?
oksano4ka [1.4K]
The appropriate response is Mg2+. It has the smallest radius the would mean the littlest separation from it's the furthest shell to the core 
Since magnesium has one less shell that calcium, Mg would have a little nuclear range. Besides, a particle of a component will have a little nuclear sweep than it's molecule be utilized as a part of its particle frame it has lost a shell
7 0
3 years ago
Para la siguiente reacción química demuestre que cumple con la Ley de la Conservación de la Materia. Recuerde que debe justifica
nikklg [1K]

Answer:

In this chemical reaction, which is considered irreversible, that is why the reaction arrow is ONE and unidirectional and not two in opposite directions, which means reversibility of the reaction.

In summary, if we look closely at the reaction, we observe that the stoichiometric values are balanced in the reaction, therefore there is THE SAME AMOUNT OF REAGENTS AS PRODUCTS.

This phenomenon has to be met in ALL CHEMICAL REACTIONS, the stoichiometric balance is essential for this reaction to be well expressed.

Why is stoichiometric balance so important? Why we indicate that we have the same amount of reagents as products, means that NOTHING IS LOST, EVERYTHING IS TRANSFORMED in the matter of the organic compounds that reacted.

Explanation:

Although if we observe the stoichiometric values well they are not correct with respect to oxygen, therefore it would be necessary to correct that in the chemical reaction, but above we briefly explain why the balancing of the reactions and the relationship they have with the conservation of the mass.

The law of conservation of mass indicates that mass is never lost, but is transformed, like energy, considering that it happens in terrestrial life.

4 0
3 years ago
4. Fill in the blanks. Complete each sentence using a term from the word bank. (4)
skelet666 [1.2K]

Answer:

A.compound genuinely bozo L XL so

4 0
2 years ago
Other questions:
  • Using the information on page 508, describe a way to make a universal indicator that would tell you the ph of a solution between
    9·1 answer
  • 6. Which of the following statements correctly describes what happens to the diaphragm during an
    12·2 answers
  • What are is the pH range of phenolphthalein and methyl orange​
    8·1 answer
  • An 80-gram sample of water at 10C absorbs 400 calories of heat energy What is the final temperature of the water?
    5·2 answers
  • One _____ is the amount of energy needed to apply a force of 1 Newton over a distance of 1 meter. (Spell out your answer.)
    15·1 answer
  • Describe the process of evaporation.
    7·1 answer
  • What types of atoms release nuclear radiation
    15·2 answers
  • In the problems below, f(x) = log2x and g(x) = log10x. How are the graphs of f and g similar? Check all that apply. Both have a
    6·2 answers
  • 4.A high-quality sleeping bag will keep you warm even during a winter camping trip high in the mountains. How do you stay warm w
    15·2 answers
  • for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!