How many moles of oxygen atoms are in 7.9E-1 moles of CO_2? Only give the numeric value of your answer. Don’t include the units.
Answer:
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ is 9.5116 × 10²³ atoms of oxygen
Explanation:
The given parameters are;
The number of moles of CO₂ = 7.9 × 10⁻¹ moles
The number of molecules of CO₂ in one mole of CO₂ = 6.02 × 10²³
The number of molecules, [tex]N_{CO_2}[/tex], of CO₂ in 7.9 × 10⁻¹ moles is given as follows;
[tex]N_{CO_2}[/tex] = 7.9 × 10⁻¹ × 6.02 × 10²³ ≈ 4.76 × 10²³ molecules
The number of atoms of oxygen in one molecule of CO₂ = 2 oxygen atoms
Therefore;
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ = 2 × 4.76 × 10²³ ≈ 9.5116 × 10²³
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ ≈ 9.5116 × 10²³ atoms of oxygen.
Jim investigates how the angle of a throw affects the distance that the ball travels.
Assuming Jim hurls the ball with
the same force each time, what is the dependent variable in the experiment?
angle at which the ball is thrown
distance traveled by the ball
time it takes the ball to hit the ground
O force exerted on the ball
Answer:
force exerted on the ball
Explanation:
What is the definition Reactivity
Answer: the state or power of being reactive or the degree to which a thing is reactive.
Explanation:
2. Why is acid rain of particular interest of study?
Acid rain is of particular interest to study because it demonstrates the areas of geographical locations which are highly susceptible to pollution and scientists are able to reveal some valid conclusions.
What is Acid rain?Acid rain may be defined as the type of rain that significantly contains an excess amount of acids. The rain becomes acidic because of carbon dioxide, nitrogen dioxide, and sulfur dioxide when liberated into the air as pollutants. All these liberated compounds dissolve with raindrops in order to form carbonic acid, nitric acid, and sulphuric acid respectively.
Acid rain thus formed is very harmful as it destroys organisms and other objects on which it falls. It also destroys aquatic life, soil properties, crop productivity, etc. Acid rain reacts with marble and gradually corrodes it.
The overall concentration of acid rain at a particular location illustrates its degree of pollution, impurities in the environment, etc.
Therefore, acid rain demonstrates how much an area is susceptible to pollution. It also delivers a good concept for scientists to check it.
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A person runs 10 laps around 400m track in 20 min.calculate the runners average velocity in m/s
Explanation:
400×10=4000m
20×60=1200s
S=D÷T
S=4000÷1200
S=3.33m/s
when molecules are joined I an ordered structure
Answer:
ice
Explanation:
Is a substance pure or a ____________?
Answer:
Pure substance is which it consists only one type of Atom , molecule , or compound....
Explanation:
HOPE IT HELP MARK AS BRAINLIST
The average atomic mass of carbon is 12.01 amu. One isotope of carbon has an atomic mass of 12.00 amu
and the other major isotope of carbon has an atomic mass of 13.00 amu. Calculate the relative abundance of
each isotope.
a. P1 = 0.50 and P2 = 0.50
b. P1 = 0.99 and P2 = 0.01
c. P1 = 0.32 and P2 = 0.68
d. P1 = 0.95 and P2 = 0.05
Explanation:
please refer to the attached file
Answer:
B
Explanation:
So when you are calculating relative abundance you are actually calculating the atomic mass on the periodic table. So you are given the two isotopes of Carbon C-12 and C-13. Now you know that the atomic mass of C is 12.01 so you have to see that you have a lot more C-12 because the atomic mass is close to 12. Now you can calculate them out like this (0.99 x 12.0) +(.01 x 13.00)=12.01.
Identify the control group and the independent and dependent variables in the following scenario: 300 chickens are divided into three equal sized groups. Group A is injected weekly with 10 mg of a growth hormone. Group B is injected weekly with 25 mg of the growth hormone. Group C is not given any growth hormone. All 300 chickens are weighed after again after 3 months.
Answer:
the control group is group c
independent variable - number of mg of growth hormone
dependent variable - growth of chickens
Explanation:
the control has nothing added to it
the growth of chickens DEPEND on the growth hormome :)
Answer:
I saw your question 4 months ago about Overwatch
Explanation:
Im down to play bro lol , I play on pc aswell
hmu, my dis cord is Conspiracy#2546 and btag is Conspiracy#11218
Students at Allendale High School were tardy most often for fourth hour, right after lunch. Therefore, the
administration decided to close campus for lunch. As a result, the number of students tardy for fourth hour drastically
decreased. When questioned, the principal could say that open campus lunch was a contributing factor to student
tardiness
Please select the best answer from the choices provided
T
F
There are different ways to know if a statement is true. When questioned, the principal could say that open campus lunch was a contributing factor to student tardiness is true statement.
This is because as they took away open campus for lunch that was when the tardiness for students decreased.
A statement is true if what it stand in gap for the case, Example is The buses are always early” is only true if what it describes is the case. That is, if it is actually the case that the buses are often early.
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Which element has the highest electronegativity?
A) Li
B) F
C) Mg
D) Ca
Answer:
The correct answer is B) F
Explanation:
The electronegativity increases from left to right. The more you go right the greater the electronegativity and the more left you go, the lower.
-Hope that helps! :)
what element make up organic compounds?
A doctor is testing a new medication. He changes his results so his hypothesis is correct. He _____.
has a lot of integrity
is following a code of conduct
is committing scientific fraud
is showing high moral standards
Answer:
Scientific fraud! Scientific fraud, an act of deception or misrepresentation of one's own work, violates these ethical standards. It can take the form of plagiarism, falsification of data, and irresponsible authorship. Scientific fraud has been attributed to misdirected attempts to attain high levels of personal and professional success.
Hope this helped <3
Suppose you have a lead ball with a mass of 454g. What is it’s volume? (Density of lead is: 11.35 g/cm3) (show your work)
Answer:
The answer is
40 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
mass of lead = 454 g
density = 11.35 g/cm³
The volume of the lead is
[tex]volume = \frac{454}{11.35} [/tex]
We have the final answer as
40 mLHope this helps you
A _ serves as a long-term storage area for water or nutrients.
answer) reservoir
How many kilograms (kg) are in 6.89 pounds (lb)?
Answer:
1.4175902 kilograms
Explanation:
Answer:
3.125 kilograms is what 6.89 pounds is
PLEASE HELP ME! I really need help coming up with a three course meal idea, I need this for chemistry, can someone help me please? I need an appetizer, a main course, and a desert. If you could find some recipes online, they don't need to be specific but do need at least five different ingredients each, that would be awesome. If you do do this, you can either list the website or type the recipe itself, I mainly need the numbers, like temperatures, amount of each ingredient, time cooking, stuff like that. I will mark whoever can do this as brainliest
appetizer - sausage w/ cheese dip
https:// www.platingsandpairings. com/sausage-bites-mustard-dipping-sauce/
Main course - Stuffed peppers
https:// www.bettycrocker. com/recipes/stuffed-peppers/63e29e18-903e-467c-aec5-fba4ce3a138f
Dessert - Lava cake
https:// sallysbakingaddiction. com/chocolate-lava-cakes/
what mass of copper is equivalent to 0.7moles?
The study of chemicals is called chemistry.
The correct answer is [tex]1.055* 10^{-22}[/tex].
Mass is defined as the Mass is the quantity of matter in a physical body. It is also a measure of the body's inertia, the resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
The formula is used is as follows:-
[tex]= \frac{1 mole}{6.022*10^{23}} *\frac{63.546}{1mole}\\\\=1.055*10^{-22}[/tex]
Hence, the correct answer is:- [tex]1.055*10^{-22}[/tex]
For more information, refer to the link:-
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You have just won a block of pure 24-carat gold. Have you just procured an element, compound, or mixture?
Answer:
element
Explanation:
24 carat gold is an example of element.
What is element?A fundamental object that is difficult to divide into smaller pieces is known as an element. An element is a substance that cannot be broken down by non-nuclear reactions in chemistry and physics.
The atomic number, or quantity of protons in an element's nucleus, is used to categorize each element. Isotopes can be produced depending on the amount of neutrons in the nucleus.
Isotopes will have different physical properties although sharing the same chemical ones. Deuterium contains one proton and one neutron, tritium has one proton and two neutrons, but normal hydrogen has one proton and no neutrons.
Therefore, 24 carat gold is an example of element.
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Which structures perform similar functions in plant and animal cells?
1. Mitochondria, nucleus, cell membrane
2. Vacuole, chloroplast, cell wall
3. Cell membrane, cell wall, nucleus
4. Ribosome, cell membrane, chloroplast
(Please answer for brainliest and a heart, thank you!)
Answer:
2
Explanation:
Sorry if Im wrong
A chemist compares two compounds that contain isotopes of carbon. What branch of chemistry does the chemist use?
Question options:
analytical
organic
inorganic
physical
Answer: análisis físico
Explanation:
Porque los isótpos son físicos.
which event would be impossible to explain by using John Dalton's model of the atom
Answer:
we need the model to answer
Explanation:
calcium oxide (Cao) and carbon dioxide (CO2). If 100 g of
calcium carbonate is allowed to decompose, 56 g of calcium
oxide is produced. What mass of carbon dioxide is produced
by the decomposition?
g
Answer:
Explanation:
CaCO3 → CO2 + CaO
depending on the conservation of mass
mass of the product = mass of the reactant
100 g = ( X + 56 )
mass of CO2 = 100 - 56
= 44 g
Answer:
44g
Explanation:
correct your welcome have a nice day everyone
what would be the mass of 9.03 x 1021 molecules of hydrobromic acid (HBr)?
A quantity must be divided by multiples of ten when converting from a larger unit to a smaller unit.
RARE
Please select the best answer from the choices provided
T
F
Answer: true
Explanation:
Cuz I’m smart
Answer:
False
Explanation:
I just took the test.
Element
lon Charge
Nearest Noble Gas
Na
+1
What is the nearest noble gas to sodium?
I will give brainliest!!!
Someone administers a toxin that disrupts ribosomal RNA (rRNA) synthesis in the cell above. Which labeled structure would be most negatively impacted by this toxin?
Choose 1 answer:
(Choice A) None of these labeled structures would be negatively impacted.
(Choice B) Structure B
(Choice C) Structure C
(Choice D) Structure D
I will give brainliest!!!
Answer:
D. Endoplasmic reticulum
Explanation:
Because Rough endoplasmic reticulum contains Ribosomes.
How are molecules built?
Answer:
molecules can be formed by stringing carbon atoms together in a straight line or by connecting carbons together to form rings
Explanation:
molecule exists when two or more atoms join together by forming chemical bonds. ... When atoms of at least two different elements come together to form chemical bonds, these molecules can be called compounds.
If carbon has 8 electrons is it a cation or anion?
Answer:
carbon is a -4 anion
Explanation:
It needs 4 electrons from other molecule(s)/element(s) to be stable.
Answer:
ation
Explanation:
The element with the chemical symbol ______ is a nonmetal help me please
Answer:
O
Explanation:
O is in the red which says nonmetal
