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
Tema [17]
3 years ago
11

‼️Picture Shown‼️Extra points‼️ You will loose your points if your answer is removed :) ‼️So trolls don’t waste your time on thi

s one ‼️
Use the table to calculate the Hf for the following reaction. Please show all work.

C6H6(g) + 15 O2 ——> 12 CO 2 (g) + 6 H2O(g)

Chemistry
1 answer:
insens350 [35]3 years ago
6 0

C6H6 + 15 O2 -- > 12 CO 2 + H2O

You might be interested in
A 100. 0 ml sample of 0. 10 m nh3 is titrated with 0. 10 m hno3. Determine the ph of the solution after the addition of 100. 0 m
DerKrebs [107]

The pH of the solution after the addition of 100. 0 ml of HNO3. The kb of NH3 is 1. 8 × 10-5. So, pH is 10.9 basic .

This neutralization occurs as the acid is added to the base:

NH3(aq)+ HNO3(aq)= NH4NO3(aq)+ H2O(l)

The initial moles of NH3present is given by,

nNH3= c×v= 0.10× 100/1000= 0.01m

The number of moles of

HNO3 added is given by:

nHNO3= c×v= 0.10× 100/1000= 0.001

It is clear from the equation that the acid and base react in a 1:1 molar ratio. So, the no. moles of NH3remaining will be 0.01 - 0.001= 0.009

The total volume is now

100.0+100.0= 200.0x cm3

The concentration of NH3 is given by,

[NH3]= c/v= 0.001/200/1000= 0.05x mol/l .

pOH= 12 (pKb− logb)

where b is the base's concentration.

Given that there is little dissociation, we can roughly compare this to the starting concentration.

pKb= −logKb= −log(1.8×10−5)= 4.744

pOH= 3.056

At 25∘xC, we know that, pH+ pOH=14

pH= 14− 3.056= 10.9

To know more about Equilbrium, visit-brainly.com/question/14366127

#SPJ4

8 0
1 year ago
Copper has two naturally occurring isotopes. Cu−63 has a mass of 62.939 amu and relative abundance of 69.17%.
fiasKO [112]
The answer is 64.907 amu.

The atomic mass of an element is the average of the atomic masses of its isotopes. The relative abundance of isotopes must be taken into consideration, therefore:
atomic mass of copper = atomic mass of isotope 1 * abundance 1 + atomic mass of isotope 2 * abundance 2

We know:
atomic mass of copper = 63.546 amu
The atomic mass of isotope 1 is: 62.939 amu
The abundance of isotope 1 is: 69.17% = 0.6917
The atomic mass of isotope 1 is: x
The abundance of isotope 2: 100% - 69.17% = 30.83% = 0.3083

Thus:
63.546 amu = 62.939 amu * 0.6917 + x * 0.3083
63.546 <span>amu = 43.535 amu + 0.3083x
</span>⇒ 63.546 amu - 43.535 amu = 0.3083x
⇒ 20.011 amu = 0.3083x
   ⇒ x = 20.011 amu ÷ 0.3083 = 64.907 amu
7 0
3 years ago
Which law states that the entropy of the universe is always increasing?
vova2212 [387]

Second law of thermodynamics states entropy of the universe is always increasing. entropy always increases in a spontaneous process .

option B) second law of thermodynamics

for example if we keep a hot cup of coffee the heat is lost to surrounding and entropy( randomness increases) since it is a natural process entropy of universe increases.

5 0
2 years ago
Read 2 more answers
The molar mass of sodium of chloride
wariber [46]

Answer:

22.989769 u.

Explanation:

pls vote.......

5 0
3 years ago
Read 2 more answers
Please help!!! Need answer fast.
bogdanovich [222]

^ tap to see the full pic

Explanation:

you make use of the formulas

amount(mol) = number of particles ÷ 6.02 × 10^23

and

mass(g) = amount(mol) × molar mass

5 0
3 years ago
Other questions:
  • What is the frequency of a wave?
    11·2 answers
  • Which of these molecules has a lewis structure with a central atom having no nonbonding electron pairs? check all that apply. ch
    11·1 answer
  • Based on the Lewis/electron dot representation
    6·1 answer
  • Relationship between the variables of Pressure and Temperature of a gas?
    5·1 answer
  • I have a rock with the mass of 4.8 and a volume of 2.3.
    12·2 answers
  • which of the following structures are tubes? A. Eustachian, Pharynx, Bronchi. B. Cilia, Adenoids, mucous, epiglottis. C. Apex, M
    13·1 answer
  • Which of the following would have the lowest entropy?
    10·2 answers
  • Which cools faster, magma or lava?
    14·2 answers
  • Help with the 3rd question plslsls I’ll brainlist.
    9·1 answer
  • Which of the following are physical properties of nonmentals
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!