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
Goryan [66]
2 years ago
10

2. The combustion of heptane (C7H16) in oxygen spontaneously occurs. The products of the reaction are carbon dioxide and water v

apor. The enthalpy of this reaction is –2877.5 kJ. Using the given information, write the complete thermochemical equation for this reaction. Explain how you developed this equation, and specify what the equation tells us about the reaction?
Chemistry
1 answer:
masya89 [10]2 years ago
8 0

The combustion of heptane (C7H16) in oxygen spontaneously occurs. The products of the reaction are carbon dioxide and water vapor. The balanced chemical equation is 7H16 + 11O2 → 7CO2 + 8H2O H = –2877.5 kJ.

You might be interested in
Compare and contrast solids liquids and gases in terms of volume shape compessibility and energy
tangare [24]

Answer:

solid has definite shape and volume.

liquid do not have definite shape but have definite volume.

gas do not have definite shape and definite volume.

solid have lowest compressibility out of three, liquid have more compressibility than solid but less than gases. gases have the highest compressibility out of three. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.

8 0
2 years ago
Which description of salt is a physical property?
Genrish500 [490]

Answer:

salt is dull and brittle and conducts electricity when it has been dissolved into water, which it does quite easily.

Explanation:

transparent and colourless in crystalline form- rather like ice.

4 0
2 years ago
To what extent do covalent compounds conduct electricity?
sertanlavr [38]

The answer is never because there's no electricity

3 0
2 years ago
Read 2 more answers
Titanium has an HCP crystal structure, a c/a ratio of 1.669, an atomic weight of 47.87 g/mol, and a density of 4.51 g/cm3. Compu
IrinaK [193]

Answer : The atomic radius for Ti is, 1.45\times 10^{-8}cm

Explanation :

Atomic weight = 47.87 g/mole

Avogadro's number (N_{A})=6.022\times 10^{23} mol^{-1}

First we have to calculate the volume of HCP crystal structure.

Formula used :  

\rho=\frac{Z\times M}{N_{A}\times V} .............(1)

where,

\rho = density  = 4.51g/cm^3

Z = number of atom in unit cell (for HCP = 6)

M = atomic mass  = 47.87 g/mole

(N_{A}) = Avogadro's number  

V = volume of HCP crystal structure = ?

Now put all the values in above formula (1), we get

4.51g/cm^3=\frac{6\times (47.87g/mol)}{(6.022\times 10^{23}mol^{-1}) \times V}

V=1.06\times 10^{-22}cm^3

Now we have to calculate the atomic radius for Ti.

Formula used :

V=6R^2c\sqrt{3}

Given:

c/a ratio = 1.669 that means,  c = 1.669 a

Now put (c = 1.669 a) and (a = 2R) in this formula, we get:

V=6R^2\times (1.669a)\sqrt{3}

V=6R^2\times (1.669\times 2R)\sqrt{3}

V=(1.669)\times (12\sqrt{3})R^3

Now put all the given values in this formula, we get:

1.06\times 10^{-22}cm^3=(1.669)\times (12\sqrt{3})R^3

R=1.45\times 10^{-8}cm

Therefore, the atomic radius for Ti is, 1.45\times 10^{-8}cm

3 0
3 years ago
Molarity of a salt water solution of "0.47" moles of NaCl dissolved in a volume of 0.25L
asambeis [7]

Answer:

1.88 M

Explanation:

The following data were obtained from the question:

Mole of NaCl = 0.47 mole

Volume of solution = 0.25L

Molarity =?

Molarity is defined as the mole of solute per unit litre of the solution. It can represented mathematically as:

Molarity = mole /Volume

Using the above formula, the molarity of the salt water solution can be obtained as follow:

Molarity = 0.47/0.25

Molarity = 1.88 M

5 0
2 years ago
Other questions:
  • Which statement correctly describes the rate of decomposition of SO3 at equilibrium?
    15·1 answer
  • Suppose you were coasting on a level surface on a bicycle, and there was no friction. Ignoring air resistance, what would happen
    15·1 answer
  • You are given 60 ml of 2.0 m naoh solution. how many ml of 6.0 m hcl solution is needed to completely neutralize the naoh soluti
    6·1 answer
  • The density of methanol is 0.787 g/ml. What is the mass in grams of 25.0 ml of methanol? Give your answer with the correct unit
    11·1 answer
  • If the reaction described by this chemical equation started with 5.77 grams of PbO2 and resulted in 0.331 grams of O2, what is t
    15·1 answer
  • Help please thank you!!!
    14·2 answers
  • 4. Explain error and how it can impact your results from an experiment
    9·1 answer
  • How many electron regions is in a nitrate ion using molecule geomerty
    8·1 answer
  • Given the following balanced equation, determine the rate of reaction with respect to [SO2].
    14·1 answer
  • Short Response
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!