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
Colt1911 [192]
3 years ago
15

For a particular isomer of C8H18, The following reaction produces 5093.7 KJ of heat per mole of C8H18(g) consumed under standere

d conditions. What is the standard enthalpy of formation of this isomer of C8H18(g)?
Chemistry
1 answer:
Aleks04 [339]3 years ago
7 0
02(g) = 0 kj/mol 
<span>CO2 (g) = -393.5 kj/mol </span>
<span>H20(g) = -241.8 kj/mol </span>

<span>H total = -5094 kJ
</span>5094kJ = [8(-393.5) + 9(-241.8)] - [X + 12.5(0)] 
<span>-5094 kJ = [-3148 + (-2176.2)] - [x + 0] </span>
<span>-5094 kJ = -5324.2 - x </span>

<span>add -5324.2 to -5094 </span>
<span>to get +230.2 = -x </span>

<span>move the negative to the other side </span>
<span>and you get -230 kj/mol</span>
You might be interested in
Determine the molar mass of CuSO4 (the solute) in a 1.0M aqueous solution of CuSO4
inna [77]

Answer:

See explanation.

Explanation:

Hello,

In this case, we could have two possible solutions:

A) If you are asking for the molar mass, you should use the atomic mass of each element forming the compound, that is copper, sulfur and four times oxygen, so you can compute it as shown below:

M_{CuSO_4}=m_{Cu}+m_{S}+4*m_{O}=63.546 g/mol+32.00g/mol+4*16.00g/mol\\\\M_{CuSO_4}=159.546g/mol

That is the mass of copper (II) sulfate contained in 1 mol of substance.

B) On the other hand, if you need to compute the moles, forming a 1.0-M solution of copper (II) sulfate, you need the volume of the solution in litres as an additional data considering the formula of molarity:

M=\frac{n_{solute}}{V_{solution}}

So you can solve for the moles of the solute:

n_{solute}=M*V_{solution}

Nonetheless, we do not know the volume of the solution, so the moles of copper (II) sulfate could not be determined. Anyway, for an assumed volume of 1.5 L of solution, we could obtain:

n_{solute}=1mol/L*1.5L=1.5mol

But this is just a supposition.

Regards.

4 0
3 years ago
4.How element gold is different from oxygen?
V125BC [204]

Answer:

Gold is a metal, more specifically a transition metal, whereas Oxygen is a nonmetal, more specifically a reactive nonmetal. Using this information, you can compare and contrast metals, nonmetals, and metalloids.

Metals are:

Shiny

High melting point

Mostly silver or gray in color

Mostly solids at room temperature – Mercury (Hg) is a liquid at room temperature

Malleable – able to be hammered into a thin sheet

Ductile – able to be drawn/pulled into a wire

Good conductors of heat and electricity

Nonmetals are:

Dull

Low melting point

Brittle – break easily

Not malleable

Not ductile

Poor conductors of heat and electricity

Metalloids are:

Found on the “zig-zag” line on the Periodic Table of Elements

Have properties of both metals and nonmetals

Can be shiny or dull

Semiconductors – able to conduct electricity under certain conditions

Explanation:

Reccomend this site for questions llike these: https://ptable.com/#Properties

7 0
3 years ago
A woman weighing 450 Newtons sits on the floor. She exerts a force on the floor of
ANEK [815]

Answer: let me figure it out rlly quick

Explanation:

4 0
3 years ago
HELP! I WILL GIVE BRAINLIST!
Dominik [7]

Answer:

carbon

Explanation:

i hope this helps

8 0
3 years ago
10 To become positively charged, an atom must: A Galn a proton B Lose a proton C С. Galn an electron D Lose an electron } ​
Studentka2010 [4]

Answer:

D: lose an electron

Explanation:

when an atom loses an electron it's positively charged and when it gain an electron it is negatively charged

6 0
3 years ago
Other questions:
  • Use the free energies of formation given below to calculate the equilibrium constant (K) for the following reaction at 298 K. 2
    15·1 answer
  • In sodium chloride, which atom loses an electron?
    13·2 answers
  • As the sun heats the surface of the ocean, two layers of water result. What separates the layers.
    7·1 answer
  • How many grams are in 2.30 x 10^24 atoms in silver
    10·1 answer
  • Which formula represents a molecular compound?<br> (1) HI (3) KCl<br> (2) KI (4) LiCl
    9·2 answers
  • What is the new boiling point if 25 g of NaCl is dissolved in 1.0 kg of water
    15·1 answer
  • 2. Which of the following are reactants of photosynthesis? *
    5·2 answers
  • The use of evaporation and condensation to separate parts of a mixture is
    6·1 answer
  • If 28 grams of N reacts completely with 12 grams of H2, then how many grams of NH6 will you end up with? ___________ grams
    5·2 answers
  • I need help on either question you can answer. Thank you god bless
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!