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
qaws [65]
4 years ago
12

The reaction of sodium peroxide and water produces sodium hydroxide and oxygen gas. The following balanced chemical equation rep

resents the reaction.
2 Na^2O^2(s) + 2 H2O(l) → 4 NaOH(s) + O^2(g)

If 15.7 moles of sodium hydroxide are produced, how many moles of O2 will be made?
Chemistry
1 answer:
a_sh-v [17]4 years ago
8 0

Answer:

3.925 mol.

Explanation:

  • From the balanced equation:

<em>2 Na₂O₂(s) + 2 H₂O(l) → 4 NaOH(s) + O₂(g) ,</em>

It is clear that 2 moles of Na₂O₂ react with 2 moles of H₂O to produce 4 moles of NaOH and 1 mole of O₂ .

<em>Using cross multiplication:</em>

4 moles of NaOH produced with → 1 mole of O₂ .

15.7 moles of NaOH produced with → ??? mole of O₂ .

<em>∴ The no. of moles of O₂ made =</em> (1 mole)(15.7 mole)/(4 mole) =  <em>3.925 mol.</em>

You might be interested in
A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?
sukhopar [10]

Answer:

ca

Explanation:

3 0
3 years ago
Low-density polyethylene is formed because _______ polymerization is very unpredictable and difficult to control.
Harlamova29_29 [7]

Answer:

radical-initiated

Explanation:

Radical-initiated polymerization is unpredictable and difficult to control. The reaction proceeds indiscriminately and produces shortened chains, loops, and branches that create holes in the polymer. This reduces its mass to volume ratio.

7 0
3 years ago
Calculate the activation energy (ea in kj/mol for a reaction if the rate constant (k is 2.7 × 10-4 (m−1sec−1 at 600 k and 3.5 ×
djyliett [7]
Below are the choices:

a. −166 kJ/mol 
<span>b. 166 kJ/mol </span>
<span>c. 1.64 kJ/mol </span>
<span>d. 1.66 × 10^5 kJ/mol
</span>
To calculate the activation energy of a reaction, we use the Arrhenius equation.  You may want to look it up to see how and why it works.  In the problem you posted, there are two temperatures and two rate constants.  After some rearranging and substitution of the Arrhenius equation, we have Ea = R T1 T2/(T1-T2) ln(k1/k2) = 8.314 J/mol K (600 K)(650 K)/(600 K-650 K) ln(2.7×10^-4 M^−1sec^−1/3.5×10^−3 M−^1sec^−1) = 166145 J/mol = 166 kJ/mol => choice b
6 0
3 years ago
What does it mean when a reaction has a negative amount of Kj
makvit [3.9K]

Answer:

heat is released in going from reactants to products

Explanation:

hope this helps

3 0
3 years ago
In two or more complete sentences explain how to balance the chemical equation, Ca + N2 ⟶ Ca3 + N2 and include all steps.
kkurt [141]
The equation CH4 + O2 ? CO2 + H2O is not balanced because there are four hydrogen atoms in the reactant side of the equation and only two on the product side. for balancing this equation we add 2 withO2 in reactants and add 2 with H2O in products.
6 0
3 years ago
Other questions:
  • What is the measurement 222.008 mm rounded off to four significant digits?
    5·2 answers
  • What has to happen for a feather and a ball to fall at the same rate
    8·1 answer
  • Convert 45 joules to heat calories
    13·1 answer
  • Which substance is use to increase the rate of catalyst?​
    9·1 answer
  • Need help fixing my answer, help would be appreciated. I am supposed to complete and balance this equation for an acid-base reac
    5·1 answer
  • The element of which group in the periodic table absorb the most energy when gaining an electron?
    8·1 answer
  • State the precaution that must be taken in carrying out an experiment with hydrogen ​
    15·2 answers
  • What is chemical compounds?​
    7·2 answers
  • Who want's to talk there is nothing to do​
    5·2 answers
  • Select the correct structure that
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!