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Which of the following is equal to avogadros number?
A. The number of atoms of bromine in 1 mol Br2
B. The number of molecules of chlorine in 0.50 mol Cl2
C. The number of molecules of nitrogen in 1 mol N2
D. The number of atoms in 1 mol CO
Answer:
A. The number of atoms of bromine in 1 mol Br2
Explanation:
Hello?
In Avogadro's constant/ number, we talk about atoms in 1 mol and not molecules.
In Avogadro's constant/ number, we talk about atoms in 1 mol and not molecules. The solution will have also been C. But it is talking about molecules. Please bear in mind that molecules is based on grams that it an element contains overall.
I hope this helps. Have a nice studies.
A 12.0 L helium balloon is inflated in an air-conditioned store at 21.0C. Assuming that the pressure remains constant, how large is the balloon when it is taken outside on a hot day at 40.0C?
The ballon will be 22.86L large when it is taken outside on a hot day at 40⁰C
According to pressure law, the volume of a given mass of gas is directly proportional to the temperature. This is expressed as:
V = kT
k = V1/T1 = V2/T2
Given the following parameters
V1 = 12.0L
T1 = 21⁰C
T2 = 40.0⁰C
Required
Final volume
Substitute the given parameters into the formula
12/21 = V₂/40
21V₂ = 12 * 40
21V₂ = 480
V₂ = 480/21
V₂ = 22.86L
Hence the ballon will be 22.86L large when it is taken outside on a hot day at 40⁰C.
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The primary way in which the amount of carbon dioxide in the atmosphere can be increased is by ____.
the burning of fossil fuels
A chemist who frequently carries out a complex experiment is
likely to have high:
a. Precision, but low accuracy
b. Precision
c.Accuracy, but low precision
d.Accuracy
Answer:
c.
Explanation:
This is because the chemist will get the average of the experiment from multiple attempts but not precision because the experiment is complex rather than simple.
The chemist will most likely have high accuracy, but low precision. A
chemist who has been performing experiments frequently will be accurate
when taking the required measurements for the experiment due to the
frequency.
Precision however won't be affected because precision deals with how
close his results from the experiment are. The complexity of the
experiment and the different variables used makes him likely to have low
precision.
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Pls help me, I’ll give 30 points
rust results from iron’s reaction to oxygen. an iron nail gains mass when it rusts. how does this reaction support the law of conservation of mass?
Determine the enthalpy for this reaction: Ca(OH)2(s) CO2(g)→CaCO3(s) H2O(l).
Answer: This is an acid-base reaction (neutralization): Ca(OH) 2 is a base, CO 2 is an acid. ; White, odorless powder. [Note: Readily absorbs CO2 from the air to form calcium carbonate.]
Explanation:
Answer:
-113.2 kJ/mol
Explanation:
(-1207-285.8)-(-981.1-393.5)= -133.2
(Products)-(Reactants)= Answer
When do forces occur?
Answer:
When there is an interaction between two objects.
Explanation:
I need help with this
Perform the following mathematical operation, and report the answer to the correct number of significant figures.
0.34 x 0.568 = [ ? ]
Answer:
0.19312
0.19312 0.19312
The boiling point of ethanol is 78c, State what this means
NaF NF3 SiF4 CaF2 NH4F
Identify and explain which of the listed compounds from the list are ionic and which are covalent.
no outside links please
students are comparing the parts of a cell to the parts of a city. Which of the following would provide the best comparison to the nucleus of a cell?
Answer:
City Hall - directs necessary activities throughout the city
Explanation:
Answer:
Town Hall,
Explanation:
How many electrons does an alpha particle contain
How is fission different from a simple chemical reaction? (1 point)
Protons cause fission reactions, while chemical reactions involve electrons.
Fission can happen with radioactive forms of atoms.
Fission reactions run out of control, while chemical reactions are controlled.
Atoms are split into smaller pieces during fission.
Answer:
C
Explanation:
Fission reactions run out of control, while chemical reactions are controlled. :)
"Chemical reactions are depends on electrons while fission depends on protons. In fission , there is no any effect of temperature while in case of chemical reaction rate of reaction will be affected."
What is chemical reaction?
The type of reaction in which more than one molecule get combined and form a different kind of product then such type of reaction can be considered as chemical reaction.
What is Fission reaction?
Fission is the breaking of a heavy nucleus into lighter nuclei, while fusion is the joining of nuclei to create a larger and heavier nucleus.
To know more about chemical reaction
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I can’t find the answer, can you help me please?
Answer: Warm ocean air then rises into the storm, then forming an area of low pressure underneath. :)
Explanation:
please help!!!
Select the correct answer.
According to the valence bond theory, what kind of bond forms when valence atomic orbitals overlap with an unpaired electron?
A. covalent bond
B. sigma bond
C. pl bond
D. no bond
Answer:
A. covalent bond
Explanation:
Hope this helps out!
What does it mean for a unit to be "derived"?
Answer:
you differentiate to find the derivative
Explanation:
Answer:
A derived unit is a unit that results from a mathematical combination of SI base units.
OR
A unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.
Explanation:
i dont know if that answered your question
Which of the tests would involve a chemical change in the mineral?
hmmm water
Explanation:
Water can change if you put food coloring
in it
THIS IS DUE LIKE REALLY SOON I RLLY NEED HELP :,)
Why is it important to possess fundamental research skills in pursuing your study?
Answer:
Research Skills enable people to identify a problem, collect informational resources that can help address the problem, evaluate these resources for quality and relevance and come up with an effective solution to the problem.
Explanation:
It is important because it might increase you critical thinking skills and it's much more easy for you to collect data. It also helps you analyze information from different sources off the internet.
What compound is this?
Answer:
Carbon Tetrachloride
Explanation:
1 Carbon atom, 4 chlorine atoms (hence "tetra" prefix)
How are valence electrons and ionization energy related?
Kinda confused on this. i need some help.
Based on their definitions, electron affinity could be considered the opposite of
Based on their definitions, electron affinity could be considered the opposite of electron affinity. This is the force required to remove an electron from an atom while it is gaseous, or the propensity of an atom to lose electrons.
What is meant by electron?The electron is a subatomic particle with a negative one elementary charge electric charge. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles.
An electron is a negatively charged subatomic particle that can exist either free or bound to an atom (not bound). Along with protons and neutrons, electrons are one of the three primary types of particles that make up an atom. Together, protons, neutrons, and electrons make up the atom's nucleus.
This is the force required to remove an electron from an atom while it is gaseous, or the propensity of an atom to lose electrons. Conceptually, this is the polar opposite of electron affinity.
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The answer would be ionization energy
How many metals, nonmetals and metalloids are there in the periodic table?
Answer:
There are 118 elements in the nature.
Metals s = 92
Non metals = 20
Metalloids Ms = 6
Explanation:
Which is a common unbalanced force acting on objects in motion?
a. friction
b. speed
c. inertia
d. acceleration
Answer:
a. friction
Explanation:
What is a common unbalanced force acting in motion? Common forces that are often unbalanced include the force of gravity and applied forces. When these forces are unbalanced, objects accelerate, change their position and find new configurations for which all forces are again balanced.
Friction is a kind of force.
What’s boiling/melting point
Answer:
Melting point is the temperature at which solid and liquid phases of a substance are in equilibrium.
Boiling point is the temperature at which its vapour pressure is equal to the external pressure.
Answer:
melting point is the temperature at which a solid changes into a liquid.
boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure
Explanation:
is it possible for a molecule to have polar bonds and not have a net dipole?
