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
xxMikexx [17]
3 years ago
7

ObIel WiLll unt COl.. USSMS A certain chemical reaction releases 31.2 kJ/g of heat for each gram of reactant consumed. How can y

ou calculate what mass of reactant will produce 1080. J of heat? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols. mass X ? Explanation Check ducabon ARghtsserved T of Ue Phacy The I'm esc
Chemistry
2 answers:
Maksim231197 [3]3 years ago
7 0

Answer:

1. The expression is: m=\frac{E}{\Delta _rH}

2. The computed mass is: m=0.0346g

Explanation:

Hello,

In this case, we know the so called enthalpy of reaction whose symbol and value is shown below:

\Delta _rH=31.2\frac{kJ}{g}

In addition, we know that the energy released by the involved reactant is:

E=1080 J

Therefore, the expression to compute the required mass, based on the given units is:

m=\frac{E}{\Delta _rH}

Finally, the computed mass turns out:

m=\frac{1080J*\frac{1kJ}{1000J} }{31.2\frac{kJ}{g}} \\m=0.0346g

Best regards.

aleksandr82 [10.1K]3 years ago
5 0

Answer:

The expression to calculate the mass of the reactant is m = \frac{1.080kJ}{31.2kJ/g}

Explanation:

<em>The amount of heat released is equal to the amount of heat released per gram of reactant times the mass of the reactant.</em> To keep to coherence between units we need to transform 1,080 J to kJ. We do so with proportions:

1,080J.\frac{1kJ}{10^{3}J } =1.080kJ

Then,

1.080kJ=31.2\frac{kJ}{g} .m\\m = \frac{1.080kJ}{31.2kJ/g}

You might be interested in
If evaporation occurs what will change 0.70 molar solution of CuSO4
faust18 [17]

Answer:

A. Molarity will increase .

Explanation:

Molarity = moles of solute per litre of solution

= moles of solute / volume of solution

If evaporation occurs , volume of solution decreases and moles of solute remains constant . Hence denominator decreases and numerator remains constant .

Hence the molarity increases .

3 0
3 years ago
The atoms and molecules that move the most quickly.
Colt1911 [192]
Plasma
Gas
Solid
Liquid
5 0
3 years ago
Read 2 more answers
In a vintage science fiction movie, space travelers find themselves on a planet orbiting a distant star in which there are curio
MA_775_DIABLO [31]

Answer:

has 4 electrons in its valence shell.

Explanation:

Silicon has 14 protons, so its neutral atom has also 14 electrons, thus, the electron distribution following the Linus Pauling's diagram is:

1s² 2s²2p⁶ 3s²3p²

Thus, it has 4 electrons in its valence shell (3), likely carbon. So, silicon would have some of the properties of carbon, such as form 4 bonds, and the structure would be similar.

5 0
3 years ago
HELP HELP PLS !! <br> 5N<br> 21N
Sonja [21]

Answer:

Check the image file attached

Explanation:

6 0
3 years ago
A certain flexible weather balloon contains 7.4 L of helium gas. Initially, the balloon is in WP at 8500ft, where the temperatur
Free_Kalibri [48]
<h2>The new volume of the balloon at the top of Pikes Peak is 10.2 L</h2>

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 577.0 torr

P_2 = final pressure of gas = 400 torr

V_1 = initial volume of gas = 7.4 L

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = 20.6^oC=273+20.6=293.6K

T_2 = final temperature of gas = 7.5^oC=273+7.5=280.5K

Now put all the given values in the above equation, we get:

\frac{577.0\times 7.4}{293.6K}=\frac{400.0\times V_2}{280.5K}

V_2=10.2L

Thus the new volume of the balloon at the top of Pikes Peak is 10.2 L

Learn more about combined gas law

brainly.com/question/12089296

brainly.com/question/4133756

3 0
3 years ago
Other questions:
  • Rusting of iron is an example of oxidation reduction or transmutation
    10·1 answer
  • Which of these elements has the lowest melting point?<br> (1) Li (3) K<br> (2) Na (4) Rb
    11·2 answers
  • Which state of matter has the highest density?
    8·2 answers
  • Rank the following compounds in order of decreasing magnitude of the lattice energy (most negative first). CsCl CaS LiCl
    13·1 answer
  • Provide at least three reasons why friction is needed.
    9·2 answers
  • Internal energy is defined as_________.
    13·1 answer
  • 1. According to the equation, what mass of hydrogen fluoride is necessary to produce 2.3 g of sodium fluoride?
    7·1 answer
  • Which is the main type of element found in the upper right part of the periodic table? O A. Metals B. Representative metals O C.
    9·1 answer
  • Help! Please I’m in science
    11·2 answers
  • What does the little 2 in 2CO2 mean?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!