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
nordsb [41]
3 years ago
10

Two sample of carbon tetrachloride are decomposed into their constituent elements. One sample produces 32.4 g of carbon and 373

g of chlorine, and the other sample produces 12.3 g of carbon and 112 g of chlorine. Are these results consistent with the law of constant composition?
Chemistry
1 answer:
Genrish500 [490]3 years ago
3 0

Answer:

These results are not consistent with the law of constant composition.

Explanation:

Law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.

Following this definition, for carbon tetrachloride (CCl₄), the ratio of its component elements by mass is:

<em>Mass of Cl / Mass of C</em>

In the first sample, mass of Cl is 373g and mass of C is 32,4. The ratio is:

373g/32,4g = <u><em>11,5</em></u>

In the second sample, mass of Cl is 112g and mass of C is 12,3. The ratio is:

112g/12,3 = <u><em>9,11</em></u>

As the ratio of its component elements is not fixed, it is possible to say that <em>these results are not consistent with the law of constant composition.</em>

<em></em>

I hope it helps!

You might be interested in
When an endothermic chemical reaction (the system) occurs inside a calorimeter containing water (the surroundings) and no heat e
Nostrana [21]

Answer:

b. Heat flows from the surroundings to the system and the temperature of the water decreases.

Explanation:

The laws of thermodynamics lets us know that energy is neither created nor destroyed but can be converted from one form to another. Also, energy transfer does accompany chemical reactions in the form of heat.

For an endothermic reaction, heat is absorbed by the system from the surroundings. This leads to a drop in the temperature of the surroundings as energy is removed.

This implies that the water temperature decreases.

8 0
2 years ago
A. How many moles of copper equal 8.00 × 109 copper atoms?
BARSIC [14]

Answer:

Explanation:

a ) one mole = 6.02 x 10²³ atoms

no of moles in given no of atoms

= 8 x 10⁹ / 6.02 x 10²³

= 1.329 x 10⁻¹⁴ moles .

b ) one mole of calcium = 40 gram

102 .5 g calcium

= 102 .5 / 40 moles

= 2.5625 moles

c )

no of moles in 5.04 g lead = 5.04 / 207

= 2.4347 x 10⁻² moles

= 2.4347 x 10⁻²x 6.02 x 10²³ no of atoms of lead

= 14.6568 x 10²¹ no of atoms .

d)  

one mole = 6.02 x 10²³ atoms

2.85 mole = 17.157 x 10²³ atoms .

e )

moles of fluorine gas = 1.08 x 10³ / 6.02 x 10²³

= .1794 x 10⁻²⁰ moles

mass in grams =  .1794 x 10⁻²⁰ x 38

= 6.8172 x 10⁻²⁰ grams

f )

no of moles in .584 g of benzene = .584 / 78

= 7.487 x 10⁻³ moles

no of molecules = 6.02 x 10²³ x  7.487 x 10⁻³

= 45.07 x 10²⁰ molecules .

g )

moles of atoms = 5.09 x 10⁹ / 6.02 x 10²³

= .8455 x 10⁻¹⁴ moles

mass in gram = .8455 x 10⁻¹⁴ x 1

=  .8455 x 10⁻¹⁴ g

h )

.45 moles of Ca₃PO₄ = .45 x 6.02 x 10²³ molecules

= 2.709 x 10²³ molecules of Ca₃PO₄

no of atoms of Ca = 3 x 2.709 x 10²³

= 8.127 x 10²³ atoms of Ca .

7 0
3 years ago
What is the difference between the molar mass and the empirical formula mass of a compound? when are these masses the same, and
fomenos
Molar mass is the mass of one stable molecule of a compound, that cannot join with another molecule of the same kind to form a new one, while an empirical formula is the molecular formula in its simplest form. E.g. empirical formula of ethene is CH2while its molecular formula is C2H4.
8 0
3 years ago
How many moles are in 12 grams of NH3?​
aleksklad [387]

Answer:

molecular weight of NH3 or grams This compound is also known as Ammonia. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NH3, or 17.03052 grams.

8 0
3 years ago
Based on the chart, which food chain best models a flow of energy in this ecosystem?
GarryVolchara [31]

Answer:

B

Explanation:

8 0
3 years ago
Other questions:
  • Which of the following is a product formed when Ag2O decomposes
    5·1 answer
  • The specific branch of chemistry that focuses on molecules such as salts and water that constitute non-living matter, but are st
    12·2 answers
  • Help? I missed 3 days of school ;-;
    9·2 answers
  • Based on the description of geothermal energy, how does magma convection aid in the production of geothermal energy?
    15·2 answers
  • When there are many people seeking the same job, this is known as a _____ of workers.
    10·2 answers
  • 1.Explain why the reactivity of group 7 decreases as you move down the group. Try to use the sentence starters here: When group
    8·1 answer
  • 14. As the temperature of a gas in a closed container increasses, what is true of the particles in the substance? (2 points)
    11·1 answer
  • Nitric oxide (NO) from car exhaust is a primary air pollutant. Calculate the equilibrium constant for the reaction
    13·1 answer
  • 50 mL graduated cylinder contains 25.0 mL of water. A 142.5040 g piece of osmium is placed in the graduated cylinder and the wat
    14·1 answer
  • What is the difference between ethanol and methanol.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!