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
Marina CMI [18]
3 years ago
9

Using the balanced chemical equation:

Chemistry
1 answer:
Arturiano [62]3 years ago
7 0
Your answer and workings are all mentioned in the picture below.

You might be interested in
The valance number of M is 3 . what is the formula of its phosphorus​
lakkis [162]
The formula for phosphorus is P4
3 0
3 years ago
Anything in red is the question
laila [671]

Answer:

  • Question 19: the three are molecular compounds.
  • Question 20: CuSO₄.5H₂O

Explanation:

<em>Question 19.</em>

  • C₂H₄
  • HF
  • H₂O₂

All of them are the combination of two kinds of different atoms in fixed proportions.

  • C₂H₄: two carbon atoms per four hydrogen atoms
  • HF: one hydrogen atom per one fluorine atom
  • H₂O₂: two hydrogen atoms per two oxygent atoms

Thus, they all meet the definition of compund: a pure substance formed by  two or more different elements with a definite composition.

Molecular compounds are formed by covalent bonds and ionic compounds are formed by ionic bonds.

Two non-metal elements, like H-F, C - C, C - H, H-O, H - H, and O - O will share electrons forming covalent bonds to complete their valence shell. Thus, the three compounds are molecular and not ionic.

<em>Question 20. </em>Formula of copper(II) sulfate hydrate with 36.0% water.

Copper(II) sulfate is CuSO₄. Its molar mass is 159.609g/mol

Water is H₂O. Its molar mass is 18.015g/mol

Calling x the number of water molecules in the hydrate, the percentage of water is:

       \dfrac{18.015x}{18.015x+159.609}=36\%\\ \\ \\ \dfrac{18.015x}{18.015x+159.609}=0.36

From which we can solve for x:

      18.015x=6.4854x+57.45924\\ \\ 11.5296x=57.45924\\ \\ x\approx4.98\approx5

Thus, there are 5 molecules of water per each unit of CuSO₄, and the formula is:

  • CuSO₄.5H₂O
4 0
4 years ago
What are the coefficients for the reaction _Cl2O5 + _H2O → _HClO3 once it is balanced?
Artemon [7]
Cl2O5+H20-->2HClO3

Just remember to have the same number of each element on both sides of the equation.
5 0
3 years ago
What is the chemical potential of an element in its standard state? Select the correct answer below: −1.00kJ/mol 0kJ/mol 1.00kJ/
Elenna [48]

Answer:

0 kJ/mol.

Explanation:

Hello,

In this case, since the chemical potential can be represented in terms of the Gibbs free energy of formation:

\mu = \frac{\Delta _fG}{n}

Thus, since the Gibbs free energy of formation of an element is zero, the chemical potential is also zero, or just 0 kJ/mol.

Best regards.

4 0
4 years ago
How does one Coulomb of charge compare with the charge of a single electron?
fgiga [73]
The charge of an e- is 1.60217657×10^-19 coulombs I.e. A very small number!
So 1 coulomb is much much bigger than the charge of an electron.
5 0
4 years ago
Other questions:
  • Describe the differences between long-term and short-term environmental changes in 2-3 sentences
    14·1 answer
  • Chromium has four naturally occurring isotopes. Chromium-50 has a percent abundance of 4.35%, chromium-52 has a percent abundanc
    8·1 answer
  • Are they all correct?
    5·2 answers
  • In the late 1 800s , experiments using cathode ray tubes led to the discovery of the
    13·1 answer
  • What is the connection between iozination energy, electronegativity, and electron affinity of elements
    5·1 answer
  • Why is respiration considered an exothermic process​
    6·2 answers
  • HELP!!!! I WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST
    13·1 answer
  • Need answers for 1-15 <br>I need these before 12:30 am please<br>​
    11·1 answer
  • Suppose you were writing a summary of the article. Which of these will be most important to put in the summary?
    15·1 answer
  • Y-4x=2 find the slope
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!