Answer:
Therefore, volume of CO₂ produced in the first step is 9141.404 L
Explanation:
Equations of reactions:
A: CaCO₃(s) ---> CaO(s) + CO₂(g)
B: CaO(l) + H₂O(l) ---> Ca(OH)₂(s)
Molar mass of CaCO₃ = 100 g; molar mass of CaO = 56 g; molar mass of CO₂ = 44 g molar mass of H₂P = 18 g; molar mass of Ca(OH)₂ = 74 g
From equation B, 1 mole of CaO produces 1 mole of Ca(OH)₂
This means that 56 g of CaO produces 74 g of Ca(OH)₂
mass of CaO that produces 8.47 kg or 8470 g of Ca(OH)₂ = 8470 g * 56/74 = 6409.73 g of CaO
Therefore, 6409.73 g of CaO were produced in reaction A
From reaction A, 1 mole of CaCO₃ produces 1 mole CaO and 1 mole of CO₂
Number of moles of CaO in 6409.73 g = 6409.73 g/56 g/mol = 114.46 moles
Therefore, 114.46 moles of CO₂ were produces as well.
Molar volume of gas at STP = 22.4 litres
Volume of CO₂ produced at STP = 114.46 * 22.4 L =2563.904 L
However, the above reaction took place at 950 K and 0.976 atm, therefore volume of CO₂ produced under these conditions are obtained using the general gas equation
Using P₁V₁/T₁ = P₂V₂/T₂
P₁ = 1.0 atm, V₁ = 2563.904 L, T₁ = 273 K, P₂ = 0.976 atm, T₂ = 950 K, V₂ = ?
V₂ = P₁V₁T₂/P₂T₁
V₂ = (1.0 * 2563.904 * 950)/(0.976 * 273)
V₂ = 9141.404 L
Therefore, volume of CO₂ produced in the first step is 9141.404 L
if an atom with a mass number of 27 has 14 neutrons,it is an isotope of which element
Answer:
the number of neutrons in above isotope = A - Z = 27 - 13 = 14. Note: The molar mass of aluminium, which is average of atomic masses of all isotopes = 26.981538 g/mol, since 13Al27 is the major isotope.
Explanation:
Answer:
Aluminum
Explanation
mass number = number of protons + number of neutrons
Number of protons = mass number - number of neutrons
No of protons = 27-14 = 13
Aluminum contains 13 protons
Which one of these is NOT one of the characteristics of living things?
A.All living things reproduce.
B.All living things are composed of one or more cells.
C.All living things grow develop and have life spans.
D.All living things provides heat and light on Earth.
Answer:
D. All living things provides heat and light on Earth.
Explanation:
its the sun that does that
Answer:
option d.
Explanation:
all living things provides heat and light on Earth.
Consider this reaction: HCO3− + H2S → H2CO3 + HS−
Which is the conjugate acid?
H2S
HCO3-
HS–
H2CO3
The conjugate acid : H₂CO₃
Further explanationGiven
Reaction
HCO₃− + H₂S → H₂CO₃ + HS−
Required
The conjugate acid
Solution
Bronsted-Lowry
Acid ⇒ H⁺ + conjugate base
Bases + H⁺⇒ conjugate acids
Acid and conjugate base : H₂S and HS−
Base and conjugate acid : HCO₃− and H₂CO₃
H₂S gives (H⁺), then the remaining acid is a conjugate base HS−
HCO₃− receives (H +), then the conjugate acid H₂CO₃
Answer:
The correct answer is D.
Explanation:
Edge'21
Which equation could be used to solve for the average speed of a car that travels 90m in 20 seconds?
Answer:
Vav=d/t
Explanation:
Because the question already gave d=90m and t=20s. Because the car is the thing that can not travel the same distances at the same times.So the equation is V[tex]\\_{av}[/tex]=[tex]\frac{d}{t} \\[/tex]
Find the volume, in Liters, of 2.5 x 1024 molecules of chlorine gas at STP.
Answer:
V = 93.0 L
Explanation:
Hello!
In this case, when computing the PVT properties for an ideal gas, we need to use the following equation:
[tex]PV=nRT[/tex]
In such a way, for 2.5 x 10²⁴ molecules of chlorine at STP (273.15 K and 1.00 atm) we first need the moles based on the Avogadro's number:
[tex]n = 2.5x10^{24}molec*\frac{1mol}{6.022x10^{23}molec} = 4.15mol[/tex]
Now, we solve for volume on the ideal gas equation to obtain:
[tex]V=\frac{nRT}{P}[/tex]
So we plug in and get:
[tex]V=\frac{4.15mol**0.08206\frac{atm*L}{mol*K}*273.15K}{1.00atm}\\\\V=93.0L[/tex]
Best regards!
(5) Use scientific notation, make the following conversions:
6.20 km to m
Answer:
6200 meters
Explanation:
To convert from km to m you have to multiply the number by a thousand
Answer:
6.2×10^3 m
Explanation:
6.20×1000=6200m
In scientific notation 6200 = 6.2×10^3
at the molecular level what form of energy do the molecules have?
Answer:
kinetic energy I think so
The form of energy molecules have at the molecular level is Kinetic energy.
Kinetic energy is defined as the energy possessed by a body as a result of its motion or movement.
Molecules interact with one another through various movements that occur
within them. This happens to aid the formation of new substances in the
ecosystem. The three states of matter exhibit varying degree of movement
within its molecules.
The energy is usually in the form of chemical energy also and is the reason
why kinetic energy is the most suitable choice.
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(I will give a brainliest) What must be changed, temperature or heat during condensation?
Answer: Temperature
Explanation:
Answer: Temperature
Explanation: can i get brainliest plss
How would kinetic energy of the dominoes be affected if the first domino did not hit the second one?(((20 points)))
Answer:
Not affected.
Explanation:
Kinetic energy of the dominoes not affected if the first domino did not hit the second one because no kinetic energy is lost due to no collision. If the first domino hit the second one, its kinetic energy decreases and changes in other form of energy such as heat and sound energy etc. But when there is no collision occur, then there is no change in the kinetic energy of dominoes.
A 14.0 tank contains 250 g of methane (CH4) gas at 27 atm at 298 K. Accidentally, 190 g of CO2 was added to the tank. What will be the resulting pressure of the mixture in the tank? Assume that no CH4 leaked out as the CO2 gas waa being added.
Answer:
[tex]P=34.8atm[/tex]
Explanation:
Hello!
In this case, since the tank has a constant volume as well as temperature, we would be able to compute the resulting pressure via:
[tex]P=\frac{n_TRT}{V}[/tex]
Whereas the total moles are computed by adding the moles of each gas as shown below:
[tex]n_{CH_4}=250gCH_4*\frac{1molCH_4}{16.05gCH_4}=15.6molCH_4\\\\n_{CO_2}=190g CO_2*\frac{1molCO_2}{44.01gCO_2}=4.32molCO_2\\\\n_T= 15.6molCH_4+4.32molCO_2\\\\n_T=19.9mol[/tex]
Thus, we plug in the total pressure, temperature and volume to get the resulting pressure:
[tex]P=\frac{19.9mol*0.08206\frac{atm*L}{mol*K}*298K}{14.0L}\\\\P=34.8atm[/tex]
Best regards!
What is the name for C2I3
Answer: The correct name for the compound [tex]C_2I_3[/tex] is, Dicarbon triiodide.
Explanation:
[tex]C_2I_3[/tex] is a covalent compound because in this compound the sharing of electrons takes place between carbon and iodine.. Both the elements are non-metals. Hence, it will form covalent bond.
The naming of covalent compound is given by:
The less electronegative element is written first.
The more electronegative element is written second. Then a suffix is added with it. The suffix added is '-ide'.
If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on.
Hence, the correct name for the compound [tex]C_2I_3[/tex] is, Dicarbon triiodide..
A solution is made by mixing 49.g of chloroform CHCl3 and 73.g of acetyl bromide CH3COBr. Calculate the mole fraction of chloroform in this solution. Round your answer to 2 significant digits.
Answer: The mole fraction of chloroform in this solution is 0.41
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
a) moles of [tex]CHCl_3[/tex]
[tex]\text{Number of moles}=\frac{49g}{119g/mol}=0.41moles[/tex]
b) moles of [tex]CH_3COBr[/tex]
[tex]\text{Number of moles}=\frac{73g}{123g/mol}=0.59moles[/tex]
To calculate the mole fraction, we use the formula:
[tex]\text{Mole fraction of a component}=\frac{\text{Moles of the component}}{\text{total moles}}[/tex]
[tex]\text{Mole fraction of chloroform}=\frac{\text{Moles of chloroform}}{\text{total moles}}=\frac{0.41}{0.41+0.59}=0.41[/tex]
The mole fraction of chloroform in this solution is 0.41
A certain chemical reaction releases of heat for each gram of reactant consumed. How can you calculate what mass of reactant will produce of heat
Answer:
Specific heat capacity formula
Explanation:
The heat capacity gives the exact heat energy at which a given mass of a substance is heated from one temperature to another.
This formula can help determine how much heat is gained or lost during the reaction and is given by:
Q = mcΔT
where:
Q = heat energy in Joules or Calories
m - mass of the substance (g)
c = Specific heat capacity (J/kg°C)
ΔT = change in temperature = (final temp - initial temp) (°C)
I hope this was helpful.
If one force on an object is 5 N upward and the other is 10 N downward what is the objects motion?
To solve this we must be knowing each and every concept related to force. Therefore, the objects motion will be towards downward with a force of 5 N.
What is force?A force is an outside entity that has the power to alter a body's state of rest or motion. It has a direction and a magnitude. The point where forces are applied is determined by the the force's direction as well as the application of the force.
Newton and dyne units are used to measure the force exerted on an item. When using the centimeter kilogram second system of units, force is measured in dynes (CGS unit). In the common international system of units, it is denoted by the letter Newton (N) (SI unit).
upward force=5 N
downward force= 10 N
total force acting on body=downward force-upward force
= 10 N - 5 N
=5 N downward force
The objects motion will be towards downward with a force of 5 N.
Therefore, the objects motion will be towards downward with a force of 5 N.
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Consider this reaction: 2HgO→2Hg+O2 .
Which of the following is the best explanation for why this reaction is a decomposition reaction?
Question 5 options:
Because it is balanced
Because oxygen is one of the reactants
Because there are two products
Because there is only one reactant
Answer:
becous thear are two products
Explanation:
The statement is "Because there is only on reactant."
What is reactant?Reactant are raw materials that react with one another and form products.
What is decomposition reaction?
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks into two or more product.
Hence the correct explanation about the reaction is "because there is only one reactant"
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The IUPAC name of(CH3)2CHCH2CH=CH2
Answer:
4-Methyl-1-pentene
Explanation:
According to the International Union of Pure and Applied Chemistry (IUPAC), IUPAC nomenclature of organic chemistry is defined as the system of naming organic chemical compounds.
There are certain rules for naming organic chemical compounds as per IUPAC. The name of given (CH3)2CHCH2CH=CH2 will be based on the same rules.
At first find out the longest continuous chain and number the chain consecutively (preference given to double and single bonds), so numbering will start from right to left. the given chemical is 5 Carbon chain long.Then, identify the groups attached to this chain. Methyl is the only group attached to this chain at 4 Carbon.Assemble the name in alphabetical order using the full name using correct prefix and suffix.4-Methyl-1-pentene is the name of this chemical, as methyl is in 4th carbon position, Pent for 5 carbon chain and -ene (suffix) for one double bond).
Hence, the correct answer is "4-Methyl-1-pentene".
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid
Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid. a. This solid is ductile and conducts electricity.b. This solid is not conductive and has a low melting point.
Answer:
See explanation
Explanation:
A is a Metallic Solid
Let us look again at the physical properties of metals;
Metals are
DuctileMalleableSonorousHigh melting pointConducts electricityWe can now see that both ductility and electrical conductivity are metallic properties.
B is a Molecular solid
Molecules are formed when atoms share electrons. In molecules, there are no free electrons hence molecules do not conduct electricity.
Secondly, molecules are held together in the solid state by weak dispersion forces hence molecular solids have a low melting point.
Which process creates two new cells from one existing cell in order to maintain homeostasis? (4 points) a Cell division b Cellular respiration c Photosynthesis d Reparation
Answer:
Cell division.
Explanation:
What are the rows of the periodic table called?
Answer:
"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."
Explanation:
Risk*
Which of the following are examples of chemical energy being released or stored?
I. A car battery reacting and releasing energy
II. A girl eating a sandwich which helps her move
III. Propane burning on a barbecue
Answer:
it is all of the above
Explanation:
Air masses carry their own weather.
True
False
The question is number 8
What is the mass of 1.84 mol NaCl? Give your
answer to the correct number of significant
figures. (Molar mass of NaCl = 58.44 g/mol)
1.84 mol NaCl =
Answer:
108 g
Explanation:
Answer:
answer in picture
Explanation:
What type of chemical reaction is taking place?
A. Synthesis
B. decomposition
C. single replacement
D. double replacement
double replacement
Explanation:
it's double replacement
QUESTION 4
How many significant figures are in the number 0.000020?
O A. 1
OB.2
O C.3
OD.4
Answer:
B) 2
Explanation:
There are two significant figures in given measurement,
2, 0
Significant figures:
1= The given measurement have four significant figures 1534.
2= All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
3= Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
4= Zero between the non zero digits are consider significant like 107 consist of three significant figures.
5= The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
The United States National Weather Service reports pressure in mm of Hg. What's the pressure of 725 mmHg in Pa, millibars, and Torr?
A. 101.325 Pa, 966 millibar, 725 Torr
B. 100,000 Pa, 1000 millibar, 760 Torr
C. 96,657 Pa, 966 millibar, 725 Torr
D.100.000 Pa, 760 millibar. 725 Torr
Answer:
C. 96,657 Pa, 966 millibar, 725 Torr
Explanation:
The pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.
What is pressure?Pressure is defined as the force that is applied perpendicularly to an object's surface in relation to the area that it is dispersed over. Pressure can actually be a very good thing. Stress only occurs and has a fully negative impact when it continues to grow and that sensation of serenity and order is replaced with one of being out of control.
Given pressure = 725 mmHg
1 mmHg = 133.32 Pa
725 mmHg = 133.32 x 725 Pa
= 96,657 Pa
1 mmHg = 1.333 millibar
725 mmHg = 725 x 1.333 millibar
= 966 millibar
1 mmHg = 1 torr
725 mmHg = 725 Torr
Thus, the pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.
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What is public participation? Why is it
necessary for environmental conservation
Answer:
maile pani aii khojeko tmle sideko dekhya ani thicheko ani comment garya haha
What element corresponds to period 5, group 2
Answer:
Strontium is the second element placed in the 5th period
Hope this will help you if not so advance sorry :)
A sample of hydrate sodium carbonate has a mass of 71.5 g. after heating, the anhydrous sodium carbonate has a mass of 26.5 grams. Calculate the % water.
Answer:
62.9%
Explanation:
Step 1: Given data
Mass of hydrate sodium carbonate (mNa₂CO₃.xH₂O): 71.5 gMass of anhydrous sodium carbonate (mNa₂CO₃): 26.5 gStep 2: Calculate the mass lost of water
We will use the following expression.
mH₂O = mNa₂CO₃.xH₂O - mNa₂CO₃
mH₂O = 71.5 g - 26.5 g = 45.0 g
Step 3: Calculate the percent of water in the hydrate sodium carbonate
We will use the following expression.
%H₂O = mH₂O / mNa₂CO₃.xH₂O × 100%
%H₂O = 45.0 g / 71.5 g × 100%
%H₂O = 62.9%
Based on the concept of the global conveyor belt, what happens to ocean water as it moves from Antarctica to the equator?
a It transfers thermal energy to deeper layers of the ocean.
b It becomes less dense and rises to the surface.
c It transfers thermal energy to the area, warming the equatorial waters.
d It becomes more dense and sinks to the ocean bottom.
Answer:
c
Explanation:
The ocean water transfers thermal energy to the area, warming the equatorial waters. Therefore, the correct option is option C.
What is thermal energy?In physics and engineering, the phrase "thermal energy" is thrown around in a lot of different situations. It can relate to a variety of distinct physical notions. They include radiation and a body of matter's inherent energy, also known as enthalpy.
Through means besides just thermodynamic work or the movement of matter, including such conduction, radiation, or friction, heat is energy that is moved into or out of a thermodynamic system. Heat is not a property of any single system or something that is "contained" within it; rather, it is a quantity that is transmitted across systems. Internal energy and enthalpy, on the other hand, are characteristics of a single system. The ocean water transfers thermal energy to the area, warming the equatorial waters.
Therefore, the correct option is option C.
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MULTIPLE CHOICE QUESTION
If
you are warming yourself near the
campfire, you are experiencing heat
transfer from the fire, through:
Convection
Conduction
Radiation
Answer:
radiation
Explanation: