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
ra1l [238]
3 years ago
5

Nitromethane (ch3no2) burns in air to produce significant amounts of heat. 2 ch3no2(l) + 3 2 o2( g) ¡ 2 co2( g) + 3 h2o(l) + n2

( g) δh° rxn= -1418 kj how much heat is produced by the complete reaction of 5.56 kg of nitromethane
Physics
2 answers:
ANEK [815]3 years ago
6 0

From the balanced reaction, we are given that 1418 kJ of heat is released for every 2 moles of nitromethane (CH3NO2) reacted.

So first calculate the moles of CH3NO2:

moles CH3NO2 = 5560 g / (61.04 g/mol)

moles CH3NO2 = 91.1 mol

 

So total heat released is:

total heat = (-1418 kJ / 2mol) * 91.1 mol

<span>total heat = -129,162.52 kJ = -129.16 MJ</span>

frozen [14]3 years ago
3 0

Answer:

6.46 x 10^4 kJ

Explanation:

Calculate moles of CH3NO2:

kg to g:

5.56 kg  x 1000 = 5560 g

molar mass of CH3NO2:

12.01 + 3.024 + 14.01 + 32.00 = 61.04 g

moles= mass / molar mass

moles = 5560 g / 61.04 g/ mol

moles = 91.1

Then calculate total heat

Total heat = (delta H / 2 mol) x moles of CH3NO2

Plug into calculator just like this

Total heat = (-1418/2) x 91.1

Total heat = 64589.9 kJ

move the decimal over 4 places:

6.46 x 10^4 kJ is the result

You might be interested in
A spring is hung from the ceiling. When a block is attached to its end, it stretches 2.6 cm before reaching its new equilibrium
Kaylis [27]

Answer:

f = 3.09 Hz

Explanation:

This is a simple harmonic motion exercise where the angular velocity is

         w² = \frac{k}{m}

to find the constant (k) of the spring, we use Hooke's law with the initial data

         F = - kx

where the force is the weight of the body that is hanging

        F = W = m g

we substitute

        m g = - k x

        k = - \frac{m g}{x}

we calculate

        k = - \frac{9.8 m}{- 2.6 \ 10^{-2}}

        k = 3.769 10² m

we substitute in the first equation

       w² = \frac{ 3.769 \ 10^2 \ m }{m}

       w = 19.415 rad / s

angular velocity and frequency are related

       w = 2πf

        f = \frac{w}{2\pi }

        f = 19.415 / 2pi

        f = 3.09 Hz

7 0
2 years ago
A red rubber ball rolls down a hill from rest with an acceleration of 7.8 m/s 2 . How fast is it moving after it has traveled 5
masya89 [10]

Answer:

39 m/s

Explanation:

7 0
3 years ago
In scientific notation, (6.2 x 10^4) x (3.3 x 10^2 ) equals ____________________.
castortr0y [4]
You will get 20460000 as your answer which is broken down into, 2.046 x 10^7 as your number has to be between 1-10.
5 0
3 years ago
Read 2 more answers
Can you please answer this question?
Sidana [21]
I think its b too but i may be wrong
5 0
3 years ago
An ice cube floats in a glass of water. will cold flow from ice into the water
Ber [7]
It'll certainly seem like it, because the water will get cold. But cold is not a thing. Heat is. What actually happens is that heat from the water flow into the ice (and melts it).
5 0
3 years ago
Other questions:
  • Is wind electrically charged
    13·1 answer
  • What best describes the difference between the second sound wave and the first?
    15·1 answer
  • What does a wave carry?<br> go
    9·2 answers
  • A baseball approaches home plate at a speed of 44.0 m/s, moving horizontally just before being hit by a bat. The batter hits a p
    15·1 answer
  • How does mineral growth occur?
    14·2 answers
  • HELP ITS FOR SCIENCE
    8·2 answers
  • WILL MARK BRAINLIEST PLEASE HELP AND SHOW ALL WORK
    13·1 answer
  • Absolute Zero is when energy / molecules stop moving.
    15·1 answer
  • Two cars, a and b, are traveling with the same speed of 40. 0 m/s, each having started from rest. Car a has a mass of 1200 kg, a
    11·1 answer
  • (a) Calculate the height of a cliff if it takes 2. 35 s for a rock to hit the ground when it is thrown straight up from the clif
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!