Answer: Detailed problem with lots of assumptions. Please see below. Percent yield is 100% (!?, so check my work).
Explanation:
Some information is missing from the problem statement. I'll make some assumptions to solve the problem, so this answer depends on those assumptions.
"Calcium carbobnate" is CaCO3, not CaCO, which is obtained by calcining (heating) CaCO3:
CaCO3 = CaO + CO2
The CaO can then be reacted with SO2 to form calcium sulfate, CaSO4 (not CaSO, as per the following balanced equation:
2CaO + 2SO2 + O2 = CaSO4
[Note: It also reacts with any SO3 molecules bouncing around, as does happen in flue gases to also form CaSO4]
The following assumes we have 255 grams of CaCO3, not CAC, whatever that stands for.
We have 135g of SO2, not SO.
This also assumes that it is CaSO4 that is produced (not CaSO), 198 grams.
Since is a two step reaction sequence, we need to first calculate the moles of Ca) produced from the CaCO3. It is a 1:1 molar ratio, and we have (255g/100.1g/mole) = 2.548 moles of CaCO3. This will produce 2.548 moles of CaO, for use in the second reaction.
2CaO + 2SO2 + O2 = 2CaSO4
This tells us we'll produce 1 mole of CaSO4 for every 2 moles of CaO, a 1:2 ratio. It also states that 2 moles of SO2 are consumed for every 2 moles CaO, a 1:1 ratio.
We have 2.548 moles of CaO, so would need the same moles of SO2 to fully react. However, we only have (135g/64.1 g/mole) = 2.107 moles of SO2. The SO2 will be the limiting reagent, so the theorectical yield will be based on this reactant, which will consume 2.107 moles of CaO, leaving 0.44 moles (24.7 g) of CaO behind.
The balanced equation tells us that 2.107 moles of CaO should produce 2.107 moles of CaSO4, which is (2.107moles)*(136.1 g/mole) = 198 grams of CaSO4. We actually got 198 grams, so the yield is 100% [Nice work].
A student determined that shaking a container of sand caused the temperature of the sand to rise. The student then performed a new experiment to see if shaking a container of pebbles would cause the temperature of the pebbles to rise.
Explain why the shaking caused the temperature of the sand to rise.
The shaking caused the temperature of the sand to rise because hey should notice an increase in sand temperature as the kinetic energy increases. This is due to the fact that the kinetic energy from their shaking is being converted to thermal energy in the sand.
What causes the temperature of the sand to change?The sand is a poor heat conductor because when the Sun warms it, the heat is not distributed evenly, making the surface hot. Also, because sand has a lower specific heat than water, when both are exposed to the same amount of light, the sand at the surface will experience a greater change in temperature.
When you rub your hands together, the action of scraping the surface of your skin back and forth against each other causes the molecules in your skin to move a little faster.
The faster that molecules move, the higher the temperature. So the friction of rubbing your hands together makes them feel warmer.
Thus, when you shake the sand the molecules move faster to make the temperature warmer.
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Which describes a molecule? (Select all that apply.)
It can be two or more of the same elements combined together.
It can be one element by itself.
It can be two or more different elements combined.
It can be the combination of different neutrons.
Answer:
a) It can be two or more of the same elements combined together.
A molecule is two or more atoms of the same element chemically combined.
Example is an oxygen molecule.
Molecules can be described as two or more of the same or different elements combined together. Therefore, options (A) and (C) are correct.
What is a molecule?A molecule can be described as a combination of two or more atoms that form the smallest unit into which the structure and chemical properties of that substance can be classified and preserved by a pure substance.
A molecule may be homonuclear if it consists of atoms of a single chemical element such as oxygen molecule (O₂) or it may be heteronuclear such as water (H₂O).
A molecule consists of an arrangement of atoms held together by the forces of valence. Two atoms that are chemically combined comprise diatomic molecules.
Heteronuclear diatomic molecules consist of two combined atoms of the same substance such as Carbon monoxide (CO), hydrochloric acid (HCl), etc.
Therefore, a molecule can consist of atoms of the same or different elements.
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Can someone tell me what this is ?
Answer:
ruler
Explanation:
that's what we call a ruler
Answer:
2 centemeters and 8 milimeters
Explanation:
Help with #3 please. I’ll mark brainly
Answer:
sa gutan ko na nga para mabrainliest na sya
PLEASE HELP!!!
A student makes a graph of ionization energy using the periodic table.
Which claim is most supported by the trends in the periodic table represented in this graph?
Explanation:
the option 2 is correct
metals tend to have lower ionizatiin energy than non metals
why is water able to easily dissolve ionic compounds
Answer:
Water is a covalently bonded molecule. H2O-> Oxygen and hydrogen are both nonmetals. Ionic compounds are made up of a nometal and metal which causes it to have electrical components. A covalent bond is stronger than an ionic bond, which allows water to break down ionic salts.
If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? (1 point)
Answer:
There is an extra O2 molecule left over
Explanation:
Among the following compounds which are isomers?
I. CH3CH2-O-CH3 II CH3CH2CH2OH
III CH3CH2–0-CH2CH3 IV. CH2=CH-O-CH3
CH
3
CH
2
OCH
3
and CH
3
CH
2
CH
2
OH have different functional groups, hence, they are functional isomers.
molecular structure of sodium oxide
Answer:
madami DA pat hung texture
I HOPE IT WILL HELP YOU.
Thank you.
TEDDYLOVER.
Can someone please help me with number five thank you!!
Answer:
multiply 7x.3048m and it =s 2.134 meters
1. Atoms are
a. The smallest building blocks of matter
b. Subatomic particles
c. Charged particles
d. Made up of leptons.
Answer:
a.the smallest building blocks of matter
Explanation:
because atoms are the smallest building blocks of matter.
Help!! is for tomorrow
El porcentaje en masa de una solución de azúcar en agua es de 3.8%, si se tienen 6.3 Kg de solución ¿Cuántos gramos de azúcar hay?
La cantidad de azúcar en la solución es 239.4 gramos. En este caso, el azúcar es el soluto, y el agua el solvente.
El azúcar es el soluto el cual se encuentra disuelto en una solución acuosa que posee una masa de 6.3 kilogramos.
Un kilogramo equivale a 1,000 gramos. Es decir, 1 Kilogramo (kg) = 1,000 gramos (gr).
Entonces, la cantidad de azúcar puede ser calculada utilizando la regla de tres simple >>
6,300 gr ________ 100 %
X ______________ 3.8 %
X = (3.8 x 6,300)/ 100 = 239.4 gr
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The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature and volume of water in the pot? (All temperatures in °C.)
Can we change the ratio between the elements?
Answer:A compound is a combination or two or more elements held together by chemical bonds. Compounds can only be separated by chemical processes. Since chemicals are composed of different elements, determining the ratio between the elements can allow you to analyze how much of each compound is present. Such a process is also useful for analyzing chemical reactions that are being performed in chemistry experiments. Making connections between units and how elements combine to form compounds can help you to better understand their ratios.Hydrogen peroxide,H2 O2. There are 2 moles of hydrogen and 2 moles of oxygen giving us a ratio of 2:2. We can reduce this ratio by dividing both numbers by a factor of both of them.
For the reaction: CaO + SO3 → CaSO4, how many moles of CaSO4 are produced
from 40.0 g of SO3?
Answer:
here hope it helps can you mark me brainliest please
The allotropic form of a non – metal is a good conductor of electricity. Name the nonmetal.
Answer:
carbon with graphite as the allotrope
How does time needed for preparation Affect meal planning? Also I need this answer asap!
Answer:
Spending time preparing indicates a better diet,(eating veggies and fruits). The opposite if you spend no time or less than an hour preparing(you are more likely to spend money on fast food)
Under normal conditions, NaOH completely ionizes as: NaOH ->
NaO + H+. TRUE FALSE
NEED ANSWER ASAP
the answer is false because naoh does ionizes
Answer: False
Explanation:
Spell all words correctly.
Which non-destructive technique is used for analyzing carpet fibers at a crime scene?
______________ is a non-destructive technique used for analyzing carpet fibers at a crime scene and preserving evidence in the original form.
( forensic science question)
Room temperature fluorescence spectroscopy is a non-destructive technique used for analyzing carpet fibers at a crime scene and preserving evidence in the original form.
In investigations, it is often necessary to preserve the physical integrity of evidence so that it can be presented in court. It therefore becomes important to use methods of analysis that are non - destructive when analyzing the material.
One of the most useful non - destructive methods of analysis is room temperature fluorescence spectroscopy. This method of analysis is accurate, yet preserves the physical integrity of evidence.
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Answer:
Spectrometry.
Explanation:
The long ridiculous answer the person gave before me doesnt even fit.
Convert the following number from scientific notation to numerical notation:
9.9 x [tex]10^{7}[/tex]
2. You are given a mixture of sand, salt, metal filings and small stones. What would you do to separate all four items?
I’ll give brainliest, thanks, 5 stars to the best answer that has been explained properly
Answer: Well, I'd personally go with the tedious route and pick them all out by hand, but I know what doesn't really help. Just a suggestion though, sorry.
Explanation: Don't listen to my advice if you want any free time.
Answer:
Start by using a magnet to separate out the metal fillings.
Then put the mixture through a sieve to separate out the stones.
Then mix it into water and drain out the sand.
Finally, boil the water off to get the salt back.
Explanation:
The metal fillings should be magnetic, and so a magnet will attract only the metal and allow you to remove it.
Putting the mixture through a sieve will basically sift it, since the sand and salt will fall through the holes but the rocks will be too big.
Mixing the mixture into water will dissolve the salt but not the sand, allowing you to pour off the water and be left with sand.
Boiling the water will cause the H2O to become a vapor, while leaving the salt behind.
Need the following answers for
Calcium bromide + potassium hydroxide
A) Balanced chem equation
B) TIE
C) NIE
A box with a mass of 3.5 kg is pushed along a table. If the net force on the box is 35 Newtons, what is the acceleration of the box?
PLLSS HELP ME
Answer:
10 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
m is the mass
f is the force
From the question
mass = 3.5 kg
force = 35 N
We have
[tex]a = \frac{35}{3.5} \\ = 10[/tex]
We have the final answer as
10 m/s²Hope this helps you
Convert 8.5 x 10-3 mm to micrometers
Explanation:
1mm = 10^-3 micrometre
8.5 x 10^-3 mm = 8.5 x 10^-6 micrometre
identify each pair of compounds as constitutional isomers, stereoisomers, identical molecules, or other.
please explain bonding of CCl 4
Answer:
CCl4 is a covalent bonded nonpolar molecule.
Explanation:
Although there is an electronegativity (small) difference between C and Cl, its structure with 4 chlorine atoms allows the polarity to be "canceled out." I have attached a picture of the molecule below where you can clearly see the dipole movement on either side gets canceled hence making it have no net dipole movement. Additionally, CCl4 has a total number of valence electrons to be 32. 7 for one chlorine atom and 4 for a carbon one. The octets are satisfied as well. It's covalent because carbon and chlorine are nonmetals.
Name an element that can be used to date back billions of years?
Using radiometric
Answer:
Uranium-238
Explanation:
Examples:
Original element Decay product Half-life (years)
Uranium-238 Lead-206 4.5 billion
Uranium-235 Lead-207 704 million
Rubidium-87 Strontium-87 48.8 billion
Explain the purpose of the magnet in a mass
spectrometer.
Answer:
The magnetic sector mass spectrometers use a bending magnet: When the ions or atoms enter the magnet, they are forced to bend, and the light ions bend sharper than the heavy ions, as a result of which they're separated into a spectrum, like a rainbow.
Explanation:
Hope This Helps!
A report on the modern periodic table
Answer:
there is nothing there
Explanation:
i don't see. anything