Answer:
In all the problems below, the pressure and the amount of gas are held constant. Problem #1: Calculate the decrease in temperature (in Celsius) when 2.00 L at 21.0 °C is compressed to 1.00 L. Converting 147.0 K to Celsius, we find -126.0 °C, for a total decrease of 147.0 °C, from 21.0 °C to -126.0 °C.
Answer:
1.9L
Explanation:
edg 2023 chemistry A
When is a secondary source more helpful than a primary source?
A. When you are an expert in the field being studied in the experiment
B. When you want to perform the experiment yourself
C. When you want all the details of the experiment
D. When you want a quick summary of the experiment
Answer:
D. When you want a quick summary of the experiment
Explanation:
Answer:
I'm pretty sure the answer is D
Explanation:
Typically with primary sources - there is a lot of detail and secondary sources generally lack some of the key details. This is why I believe D to be right because it would be just a quick summary and a few details.
I hope this helps you :)
Is the size of your muscles a part of your DNA? Explain.
Answer:
yes
Explanation: Our DNA determines how many muscle fibers a person is born with. This number never changes cause one can't make more muscle fibers during their lifetime. With more muscle fibers, one has the potential to be stronger.
It is an acquired trait because you could train your muscles to become bigger. When you train, for example resistance training, your muscle produces more myofilaments which increases their diameter. This is why you develop large muscles when you train.
What would be the multiplier if oxygen had come out to be 2.33 mol?
2
3
4
Answer:
The multiplier is 3
Explanation:
For this problem, we need to find an integer for the number of moles of oxygen. Let's see the results by multiplying 2.33 and 2, 3, 4:
2.33 mol · 2 = 4.66 moles.
2.33 mol · 3 = 6.99 moles ≈ 7 moles.
2.33 mol · 4 = 9.32 moles.
You can note that if we multiply 2.33 moles by three (3), we obtain an integer of the number of moles.
Do you think plate motion would take place on that planet? Why or why not? (Use the words in the Word Bank if it helps you answer the question.)
Explanation:
Tectonic plate motion only occurs when the core of the planet is molten. If the planet does not have a magnetic field, then that means the core is frozen. If the core is frozen, then there is no plate motion
Which of these is not a cycle studied by scientists?
O carbon
o hydrogen
O
rock
O
water
Answer:
Rock
Explanation:
There is a carbon cycle that scientists have studied that shows how carbon is reused in an ecosystem so carbon is not the answer.
There is a hydrogen cycle that scientists have studied that shows how hydrogen is exchanged between biotic and abiotic sources.
There is no rock cycle
There is a water cycle that has been studied by scientists that shows the movement of water within the earth and the atmosphere
The answer is Rock
5) What type of energy does an x-ray give off?
A) Radiant B) Mechanical C) Electrical
D) Chemical
6. According to the graph above, which paper towel brand adsorbed the 5 points
most liquid?
Bounty
Brawny
Viva
How does the nervous system help an organism meet a challenge of life?
Questions:
It digests food in order to allow the organism to obtain energy.
It responds to stimuli to help protect an organism and maintain structure.
It provides structure to protect internal organs, which helps protect the organism.
It carries and transports oxygen to all the cells of the body.
Answer:
it would be the second option. It responds to stimuli to help protect an organism and maintain structure
Answer:
it is the second one
Explanation:
i took the test
ii. Using the equation Erd-Ecathode - Eanode, calculate the overall cell potential for the cell in step b.
Be sure to show all steps completed to arrive at the answer
Answer:
0.637 V
Explanation:
The balanced redox reaction is:
Here Zn undergoes oxidation by loss of electrons, thus act as anode. Lead undergoes reduction by gain of electrons and thus act as cathode.
Where both are standard reduction potentials.
= -0.763
= -0.126
The standard emf of a cell is 0.637 V
types of reactions lab report
Answer:
There are five main types of chemical reactions. These are synthesis, decomposition, combustion, single replacement and double replacement.
Explanation:
Hope Its helps you ! : )Which structure of the skeletal system holds bones together?
joint
ligament
cartilage
Answer:
The answer is ligament
Explanation:
Hope that helps!
No organism can live forever. Therefore, in order to ensure the survival of their species, living organisms must all possess the ability to _______.
A.
die
B.
reproduce
C.
speak
D.
move
Answer:
D it's because we hot same question in my module and my teacher said I'm right
Ca+Fe(No3)2—> Fe+Ca(No3)2
What is the balanced reaction?
Answer:
Ca+Fe(No3)2 —> Fe+Ca(No3)2
Explanation:
This reaction is already balanced, you can tell because if you add up all the numbers that are on each side you get the same number. (3+2=2+3)
The Linnaean system of classification sorts organisms into groups using a hierarchical system of levels.
List the following terms correctly in the Linnaean classification system from the most general to the most specific.
Order
Phylum
Species
Kingdom
Genus
Class
Family
→ →
Answer:
The order for the Linnaean classification system is:
Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
Assuming constant conditions, how many milliliters of chlorine gas react to yield 1.00 L of dichlorine trioxide?
Cl2(g)+O2(g)→Cl2O3(g)
At constant conditions, 1000 mL of the chlorine gas will be required to yield 1.00 L of dichlorine trioxide.
Stoichiometric equationFrom the equation of the reaction:
2Cl2(g)+3O2(g)→2Cl2O3(g)
Mole ratio of Cl2O3 and Cl2 = 1:1
At standard conditions, 1 mole of gas equals 22.4 L volume.
1.00 L of Cl2O3 would, therefore, be:
1 x 1/24 = 0.04 moles
Equivalent mole of Cl2 = 0.04 moles.
Thus, 1.00 L or 1000 mL of Cl2 will also be required.
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What coefficient should be written in front of CO2 to balance the chemical reaction?
2C8H18 + 25O2 → ______ CO2 + 18H2O
Answer:
The answer is 16 as the coefficient
Explanation:
I hope this helps
As shown in the following reaction, 50.0 grams of Magnesium (Mg) and 75.0 grams of (HCl) are reacted:
Mg + 2 HCl -----------> MgCl2 + H2
What is the limiting reactant?
Answer:
mg
Explanation:
there are 2.05 moles mg and 2.05 moles hcl
MM Mg = 24 g/mol
MM HCl = 36.5 g/mol
mol Mg = 50 : 24 = 2.083
mol HCl = 75 : 36.5 = 2.055
moles of reaction: divide the moles of each reactant by its corresponding coefficient in the balanced equation.
Mg : HCl = 2.083/1 : 2.055/2 = 2.083 : 1.028
HCl is the limiting reactant because it gives the fewest moles of reaction.
Which are the functions of the skin? Check all that apply.
helps control body temperature
moves parts of the body
serves as a barrier of protection
releases waste materials
produces vitamin A
gives the body support and shape
Answer:
A,C,D
Explanation:
I TOOK THE TEST
How many moles of C3H8 contain 4.95 x 10^24 hydrogen atoms?
Answer:
3.09 moles C3H8 8.22 moles C3H8 1.03moles C3H8 6.58moles C3H8 9.73moles C3H3
One mole of every substance contains 6.02×10²³ atoms. The no.of moles of C₃H₈ containing 4.95×10²⁴ hydrogen atoms is 1.02 moles.
What is one moles?A substance which contains 6.02×10²³ atoms is called one mole of that substance. C₃H₈ contains 8 hydrogens. The atomic mass of hydrogen is 1.008 g.
The number of hydrogen atoms in one mole of C₃H₈ = 1.008× 6.02×10²³
= 4.85×10²⁴ hydrogen atoms.
Thus the no.of moles of C₃H₈ that contains 4.95×10²⁴ hydrogen atoms is calculated as follows:
(4.95×10²⁴× 1)/4.85×10²⁴ = 1.02 moles.
Therefore, 1.02 moles of C₃H₈ contains 4.95×10²⁴ hydrogen atoms.
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Is it as critical for your tap water to be a good buffer as it is for the water at the
nearest lake to be a good buffer? Why or why not?
Yes, it is critical for your tap water to be a good buffer as it is for the water at the nearest lake to be a good buffer.
Why the tap water and lake should be good buffer?This is because the tap water is the water coming from the nearest lake so it should also be a good buffer just like the nearest lake so we can conclude that it is critical for your tap water to be a good buffer as it is for the water at the nearest lake to be a good buffer.
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what does the electronegravity of an atom indicate?
Answer:
The electronegativity of an atom indicates the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.
Hope this helps!!!
2.5 mol KCL in 1.0 L of solution
The molarity of the solution is 2.5 M
Stoichiometry
From the question, we are to determine the molarity of the solution
Using the formula,
[tex]Molarity = \frac{Number\ of\ moles}{Volume}[/tex]
From the given information
Number of moles = 2.5 moles
Volume = 1.0 L
Then,
[tex]Molarity = \frac{2.5}{1.0}[/tex]
Molarity = 2.5 M
Hence, the molarity of the solution is 2.5 M
Here is the complete question:
What is the molarity of 2.5 mol KCL in 1.0 L of solution
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Other than the process in the title, what are two other processes that are explained in the passage? A. the changing of seasons and precipitation B. photosynthesis and chlorophyll C. precipitation and temperature change D. photosynthesis and transpiration
PLEASE HELP
source: the life of a leaf
Answer:
life of leaf and leaf is obob
Write an introductory text about metals, adding details you know
Answer:
See below
Explanation:
Most of the elements found on earth are metals. A look at the periodic table shows that these elements occupy the entire left-hand stretch of the table, from the main group, through the transition metals, lanthanides, actinides, alkali and alkaline earth elements. One element included here, hydrogen, is rarely classified as a metal. On earth, hydrogen is a gas, and it is usually classified as a non-metal, like oxygen and nitrogen. However, at very low temperatures and very high pressures, hydrogen is a solid, and under the right conditions it is expected to behave more like a metal. It is thought that gas giants, such as Jupiter and Saturn in our solar system, may have metallic hydrogen cores. Metallic elements are not generally found as single atoms. Instead, the atoms in an element such as iron cluster together to make a larger structure. The materials formed in this way have some similar properties. Metals are shiny. Metals are malleable; they can be bent and formed into different shapes (at least when heated). Metals are good conductors of electricity. In metals, large groups of atoms cluster together. Metal atoms form large, extended arrays, with the atoms repeating in specific patterns throughout the solid.
The properties of metals are really important. The fact that metals are malleable allows them to be formed into sheets that can be used to make cars, airplanes, railway lines, cargo containers and ships, as well as more delicate items such as jewelry and surgical tools. A related property, ductility, allows metals to be stretched into long, thin wires. Together with the conductivity of metals, this property allows transmission lines to carry electricity from generating stations to people like you. Sometimes, the source of electricity is hundreds of miles away; electricity used to power a laptop in New York may come from places like La Grande Baleine or James Bay, in northwestern Quebec. Some of these properties can be understood by thinking about the structure of metallic elements. A great deal of our structural understanding of metals and other materials comes from x-ray diffraction studies. A very focused beam of x-rays can be sent into a material, where they will bounce off the atoms and scatter in different directions. The outcome sounds chaotic, but if the solid is highly organized, the x-rays behave in very predictable ways. The result is an x-ray diffraction pattern. A diffraction pattern is a little like the pattern of ripples on a pond when a stone is thrown into calm water. The pattern can be studied and decoded mathematically to find the locations of the atoms within the material. X-ray diffraction can reveal the atomic-level structures of highly ordered materials such as metals. What does x-ray diffraction tell us? Evidently, a chunk of metal is not just a mass of atoms stuck together randomly. Instead, the atoms arrange themselves in neat layers in very specific ways. These layers of atoms sit on top of each other to form a three-dimensional solid. One of the properties that results from this organized arrangement of atoms is the malleability of metals. If you take a nice, soft metal such as copper, after annealing it in a fire or oven, it can be bent and shaped easily. With copper, this can be done even after the metal has cooled to room temperature. When you bend the copper, you are actually causing layers of atoms to slide over each other, until you stop bending and they come to rest in a new location. If you have ever done this, you'll know that the more you work with the copper, the harder it is to bend. That's because while you are sliding layers of atoms back and forth, occasionally an atom (or an entire row of atoms) slips out of place. It is no longer part of a smooth layer, and so other atoms can't slide past it as easily. This situation is called a defect. Once there are enough defects in the metal, it is impossible to bend the material anymore. Metal atoms are found in organized layers. Because these layers can roll over each other, metals can be worked into different shapes.
A 300.0g sample of glass at 76.0C was placed in a large calorimeter containing 1000.0g of water. The water temperature was initially 23.9C. After the heat transfer, the water temp rose to 27.0C. Calculate the specific heat of the glass; then determine the percent error in this value.
For a 300.0g sample of glass at 76.0C placed in a large calorimeter containing 1000.0g of water, the specific heat of the glass and the percent error in this value are mathematically given as
C= 0.211 cal / g
% E = 5.5%
What are the specific heat of the glass and the percent error in this value.?
Generally, the equation for the balanced heat on glass is mathematically given as
Mg* SH of glass *dT of glass = Mwater * SH of water * dT of water
Therefore
300 * C * (76 - 27) = 1000 * 1 * (27 - 23.9)
C = 1000 * 3.1 / (300 * 49)
C= 0.211 cal / g
In conclusion,The precent error is
% E = (0.211 - 0.2) * 100 / 0.2
% E = 5.5%
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Choose the term that is described.
use of the Internet to access programs and data on computers that are not owned and managed by the user often using
large data centers
states that processing power for computers would double every two years
uses biological components like DNA to retrieve, process, and store data
the anticipated next generation of technologies that are expected to drastically increase processing capabilities
Answer:
first is cloud computing second is moores law third is biocomputing and the last one is quantum computing
Explanation:
The use of biological components like DNA to retrieve, process, and store data in the anticipated next generation of technologies that are expected to drastically increase processing capabilities are not possible.
What is DNA?
DNA has a property by which it can replicate that si why said to be self-replicating material and always present in all living organisms few of them which cannot take but almost all.
DNA is the main constituent of chromosomes which is responsible to carry genetic information to the next generation and which cannot be used in computers as it is a natural thing controlled by nature only.
Therefore, the use of biological components like DNA to retrieve, process, and store data in the anticipated next generation of technologies that are expected to drastically increase processing capabilities are not possible.
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4. How many grams of water are produced from 100 grams of oxygen?
Answer:
11 grams of hydrogen and 89 grams of oxygen
Explanation:
every early childhood education program should develop a
A. plan for children and adults to eat separately
B. method to overcome food intolerance
C. procedure that allows families to bring in homemade food
D. written nutrition , feeding, and food service plan
Answer:
I guess D ...,...,.....
What is the molarity of 2.00L of a solution containing 1.00 mole of KCl?
Question 4 options:
0.500M
2.00M
1.00M
.100M
The molarity of the solution is equal to 0.500M.
Mole calculation
To calculate the molarity of a solution, one must use the value of the amount of moles and the volume, so that:
[tex]M = \frac{mol}{v}[/tex]
So, applying the values given in the question we have:
[tex]M = \frac{1mol}{2L}[/tex]
[tex]M = 0.5mol/L[/tex]
So, the molarity of the solution is equal to 0.500M.
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Write full electron configurations for kr
Answer:
kr means krypton
krypton atomic number is 36
electronic configuration: 1S² 2S² 2P⁶ 3S² 3P⁶3d¹⁰ 4S² 4P⁶
Explanation:
in other forms:
[Ar] 3d¹⁰ 4S²4P⁶