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
asambeis [7]
3 years ago
5

ammonia (NH3(g) Hf=-45.9 kJ/mol) reacts. with oxygen to produce nitrogen and water (H2O(g) Hf = -241.8 kJ/mol according to the e

quation below. 4NH3(g) + 3O2(g)---> 2N2(g) +6H2O(g) what is the enthalpy of the reaction
Chemistry
2 answers:
weeeeeb [17]3 years ago
8 0

Answer:The answer given is 100% correct. I think kids are just looking at the wrong problem thats why it has a 2 star.. B is correct

Explanation:edge 2020

kherson [118]3 years ago
6 0

Answer:

ΔH°_rxn = -195.9 kJ·mol⁻¹

Explanation:

                              4NH₃(g) + 3O₂(g) ⟶ 2N₂(g) +6H₂O(g)

ΔH°_f/(kJ·mol⁻¹):    -45.9          0                 0        -241.8

The formula relating ΔH°_rxn and enthalpies of formation (ΔH°_f) is

ΔH°_rxn = ΣΔH°_f(products) – ΣΔH°_f(reactants)

ΣΔH°_f(products) = -6(241.8) = -1450.8 kJ

ΣΔH°_f(reactants) = -4(45.9) = -183.6 kJ

ΔH°_rxn =  (-1450.8 + 183.6) kJ = -1267.2 kJ

You might be interested in
How is the life cycle of a star similar to that of a human?
Arturiano [62]

Answer: They both have stages where they are born and die which is in the main sequence and supernova and in a human they are born in a womb and die of old age.

Explanation:

6 0
2 years ago
Read 2 more answers
G- how many grams of f2 gas are there in a 5.00-l cylinder at 4.00 × 103 mm hg and 23°c?
aniked [119]
<span>PV = nRT (4000 Torr)(5 L) = n (62.4 Torr-L/mol-K)(296K) n = 1.08 moles 28 g/mol, 1.08 moles = 30.3 grams your answer is C.30.3 g</span>
6 0
3 years ago
Two objects of the same mass are moving at the same velocity. You give
vladimir1956 [14]
I would imagine they’d be equal.
F = ma
We can treat mass and force as constants because they do not change throughout both systems and they are the same on both systems. That would mean the acceleration would be the same for both systems.

An explanation of this could be the two forces are acting in different directions, so one is positively accelerating the object and the other is negatively accelerating it
3 0
3 years ago
SOLVE The density of a gas is 0.68 g/mL. What amount of space would 23.8 g of this gas occupy?
Contact [7]

Answer:

<h2>The answer is 35 mL</h2>

Explanation:

Density of a substance can be found by using the formula

Density(\rho) =  \frac{mass}{volume}

From the question we are finding the amount of space the gas will occupy that's the volume of the gas

Making volume the subject we have

volume =  \frac{mass}{Density}

From the question

mass = 23.8 g/mL

Density = 0.68 g/mL

Substitute the values into the above formula and solve

That's

volume =  \frac{23.8}{0.68}

We have the final answer as

<h3>35 mL</h3>

Hope this helps you

6 0
3 years ago
Complete and balance the equation for the reaction of sodium with water.<br> Na+_H2O+ H2
valentina_108 [34]

2Na + 2H2O → 2NaOH + H2

The balanced equation

4 0
2 years ago
Other questions:
  • You are given a sample of a Group II metal chloride, but the identity of the metal is unknown. Knowing that all Group II metal c
    14·1 answer
  • How do I write the following elements:
    5·1 answer
  • X + Y XY + heat What happens as the temperature is increased? [X] remains constant. [X] increases. [X] decreases.
    7·2 answers
  • Write this numeral in scientific notation.<br><br> 820.5
    10·1 answer
  • Calculate the density of a sample of metal that has a mass of 1668 g and takes up a volume of 186.2 cm
    14·1 answer
  • Lipid bilayers:A. depend on hydrophobic interactions to arrange the polar head groups together in the interior of the bilayer. B
    14·1 answer
  • Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change? There is no change in color. The
    11·1 answer
  • explain why zn reacts more slowly with dilute hydrochloric acid then with concentrated hydrochloric acid​
    13·1 answer
  • Milk (pH 6.7)
    9·2 answers
  • In science, observations are objective, but intereroes are subjective. True or False?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!