How many liters of O2 gas will be produced at STP from 4 moles of KC1O3
Answers
Answer:
V = 134.5 L
Explanation:
Given data:
Number of moles of KClO₃ = 4 mol
Litters of oxygen produced at STP = ?
Solution:
Chemical equation:
2KClO₃ → 2KCl + 3O₂
Now we will compare the moles of KClO₃ with oxygen.
KClO₃ : O₂
2 : 3
4 ; 3/2×4 = 6 mol
Litters of oxygen at STP:
PV = nRT
V = nRT/P
V = 6 mol × 0.0821 atm.L/mol.K × 273 K / 1atm
V = 134.5 L / 1
V = 134.5 L
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A natural sample of neon has a relative atomic mass of 20.2.What is the mass number of the most common type of atom in the sample of neon?
2C₂H6 + 702 —>4C02 + 6H₂OIf you used 4.88x10^25 molecules of C2H6 to start afire, how many molecules of CO2 did you Create?
Answers
Answer:
19.3 g/cm³
Explanation:
Mass = 965 g; volume = 50 cm³. So,
p = 19.3 g/cm3
V√3=3.6840315cm :))
finding the average precipitation in your city
B.
determining the highest temperature in your state
C.
finding a source of copper or iron in your state
D.
finding the lowest point in your city
Plz help me
Answers
the answer is D. because a topographic map measures the lowest and highest points in a certain place
Hope this helps
finding the lowest point in your city
Answers
The answer is 368 minutes will it takes the iodine to be absorbed in one's system.
(Reactants) → (Products)
In this equation, the total mass of the reactants is
A) equal to the mass of AgCl.
B) less than the mass of AgCl.
C) equal to the total mass of the products.
D) greater than the total mass of the products.
Answers
Answer:
C the total mass of the reactants = mass of products
Explanation:
In a chemical reaction atom are not created or destroyed, they are just rearranged
Answers
Answer: Option (B) is the correct answer.
Explanation:
A covalent compound is a compound whose atoms are bonded together by sharing of electrons.
Also it is known that in covalent compounds weak inter molecular forces of attraction exists. Due to which it is easy to break the bond between atoms.
Hence, covalent compounds have low melting and boiling point .
Other properties of covalent compounds are as follows.
- They are brittle in nature.
- The do not have a rigid crystal structure.
- They exist as solids, liquids and gases.
- Covalent compounds do not conduct electricity.
Thus, we can conclude that out of the given options property that is typical of a covalent compound is that they have low melting and boiling points.
Answer: the correct option is (C).
Explanation:
Covalent compounds have lower melting and boiling points due to presence of weak inter-molecular forces by which molecules are weakly associated to each other. Hence, melting and boiling of covalent compounds occurs at low temperatures.
Usually, Covalents compounds have following properties:
- They are brittle solids
- They do not conduct electricity
- They do not have rigid crystal structure.
- They exist in all states: solids, liquids and gases.
How could she explain why her compass was not working?
A
A compass works with a magnetic field, and the electric current running through the lines above it would interfere with the magnetic field.
B
The compass works because of an electric field, and the electric current running through the lines above would interfere with the electric field.
C
The compass works because of a gravitational field, and the magnetic current running through the lines above would interfere with the gravitational field.
D
A compass works because of a magnetic field, and the magnetic current running through the power lines above it would interfere with the magnetic field below it.
Answers
a compass works with magnetic field the answer is d