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
Vesnalui [34]
3 years ago
11

How many grams of H2O2 will be produced if 14.86-grams of water is reacted with excess oxygen? How many molecules of H2O2 were p

roduced?
2H2O (l) + O2 (g) ® 2H2O2 (aq)
Chemistry
1 answer:
Wittaler [7]3 years ago
7 0

Answer:

4.99 ×10²³ molecules

Mass = 28.22 g

Explanation:

Given data:

Mass of H₂O₂ produced = ?

Mass of water react = 14.86 g

Number of molecules of H₂O₂ produced = ?

Solution:

Chemical equation:

2H₂O + O₂        →     2H₂O₂

Number of moles of water:

Number of moles = mass/molar mass

Number of moles = 14.86 g/ 18 g/mol

Number of moles = 0.83 mol

Now we will compare the moles of water and H₂O₂.

                   H₂O          :               H₂O₂

                    2              :                2

                  0.83           :             0.83

Mass of H₂O₂:

Mass = number of moles × molar mass

Mass = 0.83 mol × 34 g/mol

Mass = 28.22 g

Number of molecules:

1 mole = 6.022×10²³ molecules

0.83 mol × 6.022×10²³ molecules / 1 mol

4.99 ×10²³ molecules

You might be interested in
Mixing magnesium and aluminum together produces an excellent lightweight material from which to make airplane parts what is this
Zielflug [23.3K]
<span>Mixing magnesium and aluminum together produces an excellent lightweight material from which to make airplane parts. This type of mixture is called an alloy. 
Alloy is a mixture of two elements, one of which is a metal. 
</span>
7 0
3 years ago
Read 2 more answers
Calculate the Ph of:
andrey2020 [161]

Answer:

pH= 3.82

Explanation:

Sodium ethanoate or sodium acetate (CH3COONa) ionises completely.

Ethanoic acid or acetic acid (CH3COOH), ionises partially because it is a weak acid.

4 0
3 years ago
Choose the reaction that represents the combustion of C6H12O2.
Leona [35]

Answer:

The answer to your question is:  letter D

Explanation:

In a combustion reaction, the reactants are always a molecule with Carbon that reacts with oxygen and the products are carbon dioxide and water.

According to the explanation, the only possible solution is:

a) C₆H₁₂O₂(l) ⇒ 6 C(s) + 6 H₂(g) + O₂(g)

b) Mg(s) + C₆H₁₂O₂(l) ⇒ MgC₆H₁₂O₂(aq)

c) 6 C(s) + 6 H₂(g) + O₂(g) ⇒ C₆H₁₂O₂(l)

d) C₆H₁₂O₂(l) + 8 O₂(g) ⇒ 6 CO₂(g) + 6 H₂O(g)

e) None of the above represent the combustion of C₆H₁₂O₂.

4 0
2 years ago
Read 2 more answers
How much energy is required to raise the temperature of 10.6 grams of gaseous neon from
Alona [7]

Answer:

Approximately 1.95 \times 10^{2}\; \rm J.

Explanation:

Look up the specific heat of gaseous neon:

c = 1.03 \; \rm J \cdot g^{-1} \cdot K^{-1}.

Calculate the required temperature change:

\Delta T = (37.9 - 20.0)\; \rm K = 17.9\; \rm K.

Let m denote the mass of a sample of specific heat C. Energy required to raise the temperature of this sample by \Delta T:

Q = c \cdot m \cdot \Delta T.

For the neon gas in this question:

  • c = 1.03\; \rm J \cdot g^{-1}\cdot K^{-1}.
  • m = 10.6\; \rm g.
  • \Delta T = (37.9 - 20.0)\; \rm K = 17.9\; \rm K.

Calculate the energy associated with this temperature change:

\begin{aligned}Q &= c \cdot m \cdot \Delta T \\ &= 1.03\; \rm J \cdot g^{-1}\cdot K^{-1} \times 10.6\; \rm g \times 17.9\; \rm K \\ &\approx 1.95 \times 10^{2}\; \rm J\end{aligned}.

3 0
3 years ago
Which reaction below represents a balanced, double replacement chemical reaction?
Mariulka [41]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

I think the reaction that represents a balanced, double replacement chemical reaction is B which is <span>Rb2O + Cu(C2H3O2)2 → 2RbC2H3O2 + CuO </span>
4 0
3 years ago
Other questions:
  • Should a mortar and pestle should be used for grinding only one substance at a time
    11·1 answer
  • WHO WAS Tannatt William Edgeworth David
    5·1 answer
  • what happens to the particles in a gas when the temperature increases? How does this affect the pressure of the gas?
    6·2 answers
  • The dominant intermolecular force that causes gaseous hcl molecules to attract one another is
    10·1 answer
  • Where do we get all of our simple and complex carbohydrates from
    15·1 answer
  • Which is the formula of nitrogen (I) oxide?
    11·2 answers
  • True or false during reactions or light is needed carbon dioxide is converted to glucose
    7·1 answer
  • Help ! i don’t know how to calculate this , it’s due at 11:59 pm
    14·1 answer
  • How many different elements are involved in the reaction shown below?
    6·1 answer
  • What type of chemical reaction is the following:<br><br> Ag2O ➜Ag + O2
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!