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
Valentin [98]
3 years ago
8

The combustion method used to analyze for carbon and hydrogen can be adapted to give percentage N by collecting the nitrogen fro

m combustion of the compound as N2. A sample of a compound weighing 8.75 mg gave 1.59 moL N2 at 25 C and 749 mmHg. What is the percentage N in the compound
Chemistry
1 answer:
12345 [234]3 years ago
6 0

Answer:

The percentage of N in the compound is 0.5088

Explanation:

Mass of compound = 8.75 mg = 8.75×1000 = 8750 g

Mass of N2 = number of moles of N2 × MW of N2 = 1.59 × 28 = 44.52 g

% of N in the compound = (mass of N2/mass of compound) × 100 = (44.52/8750) × 100 = 5.088×10^-3 × 100 = 0.5088

You might be interested in
What did the experiments of scientists after John Dalton reveal about his
EastWind [94]

A. Dalton's theory that atoms could not be divided was incorrect

3 0
3 years ago
The message that a neuron carries
Vinvika [58]
<span>The message that a neuron carries is the nerve. This gives a signal and acts as a nerve. </span>
6 0
3 years ago
Determine total H for bonds broken and formed, the overall change in H, and the final answer with units. Is it ENDOthermic or EX
Mrac [35]
  • E(Bonds broken) = 1371 kJ/mol reaction
  • E(Bonds formed) = 1852 kJ/mol reaction
  • ΔH = -481 kJ/mol.
  • The reaction is exothermic.
<h3>Explanation</h3>

2 H-H + O=O → 2 H-O-H

There are two moles of H-H bonds and one mole of O=O bonds in one mole of reactants. All of them will break in the reaction. That will absorb

  • E(Bonds broken) = 2 × 436 + 499 = 1371 kJ/mol reaction.
  • ΔH(Breaking bonds) = +1371 kJ/mol

Each mole of the reaction will form two moles of water molecules. Each mole of H₂O molecules have two moles O-H bonds. Two moles of the molecule will have four moles of O-H bonds. Forming all those bond will release

  • E(Bonds formed) = 2 × 2 × 463 = 1852 kJ/mol reaction.
  • ΔH(Forming bonds) = - 1852 kJ/mol

Heat of the reaction:

  • \Delta H_{\text{rxn}} = \Delta H(\text{Breaking bonds}) + \Delta H(\text{Forming bonds})\\\phantom{ \Delta H_{\text{rxn}}} = +1371 + (-1852) \\\phantom{ \Delta H_{\text{rxn}}} = -481 \; \text{kJ} / \text{mol}

\Delta H_{\text{rxn}} is negative. As a result, the reaction is exothermic.

3 0
2 years ago
What do the dots around a symbol in a Lewis structure represent?
anzhelika [568]
B. valence electrons
3 0
2 years ago
Which will change will cause the gravitational force between a baseball and a soccerball
Vladimir79 [104]
Baseball has more chances




Pls mark as brainliest
4 0
3 years ago
Other questions:
  • What are mole ratios used for?
    7·1 answer
  • 20 points if you solve these please last project then i'm done with school
    15·2 answers
  • An aqueous solution is saturated in both potassium chlorate and carbon dioxide gas at room temperature. what happens when the so
    10·2 answers
  • PLEASE HELP!!! PLEASE.
    10·1 answer
  • Yo answer my question
    13·2 answers
  • If more powdered Kool-Aid is added to the same amount of water, what happens to the solution (the answer I clicked I don’t know
    6·1 answer
  • How kids today make slime and why each ingredient is used. What does each ingredient do and what happens if you change how much
    11·1 answer
  • Mole Conversion:Find the number of moles in 384g of cobalt.​
    10·1 answer
  • How many moles of helium gas would it take to fill a balloon with a volume of 1000.0 cm 3when the temperature is 32 o C and the
    7·1 answer
  • hi there I have a question see my teacher wants me to record my self in how to solve a math problem but am so scared of many rea
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!