Determine the mass of oxygen produced in the decomposition of 25.0 g of potassium
chlorate, which would also yield the formation of potassium chloride. Show steps please!
Answers
Answer:
9.80g of O2.
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
2KClO3 —> 2KCl + 3O2
Step 2:
Determination of the mass of KClO3 that decomposed and the mass of O2 produced from the balanced equation. This is illustrated below:
Molar Mass of KClO3 = 39 + 35.5 + (16x3) = 122.5g/mol
Mass of KClO3 from the balanced equation = 2 x 122.5 = 245g
Molar Mass of O2 = 16x2 = 32g/mol
Mass of O2 from the balanced equation = 3 x 32 = 96g.
From the balanced equation above, 245g of KClO3 decomposed to produce 96g of O2.
Step 3:
Determination of the mass of O2 produced in the decomposition of 25.0g of KClO3. This is illustrated below:
From the balanced equation above, 245g of KClO3 decomposed to produce 96g of O2.
Therefore, 25g of KClO3 will decompose to produce = (25x96)/245 =
9.80g of O2.
Therefore, 9.80g of O2 is produced from the decomposition of 25g of KClO3.
Related Questions
A 10-ft moving truck has a volume capacity of 402 cubic feet, which is equivalent to 1.138 x 10^7 milliliters. What
mass of silver, in megagrams, will fit in this moving truck? The density of silver is 10.49 g/mL.
_________ Mg (input numerical answer only)
Answers
Answer: The mass of silver is 1.19 X 10^14 M g
Explanation: The volume of the truck is 402 cubic feet or 1.138 x 10⁷ mm.
The density of silver is 10.49 g/mL.
We need to find the mass of silver that will fit in this moving truck. Density equals mass divided by volume. So,
d= m/v where m= mass m= d x VM=10.49 g/mL X 1.138 X 10∧7 mLM=119376200 g 1 gram=10⁻⁶ Megagram 119376200= 1.19 X 10^14 Mg hence the mass of silver is 1.19 X 10^14 M g hopefully this will help you please mark me as brainlist
I just need help all I need is the answer please some one
Answers
Answer: The correct fill-in-the-blank answers are:
1. through binary fission (already filled in)
2. be resistant to penicillin
3. through asexual reproduction.
4. cell replicates before
5. a simpler process
Explanation:
The correct fill-in-the-blank answers are:
1. Bacteria reproduce through binary fission (already filled in)
2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin
3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.
4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.
5. Asexual reproduction is a simpler process than sexual reproduction.
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Use the chemical reaction to answer the question. CaCO3→CO2+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown.
What is the total mass of the products?
A. 10 grams
B. 15 grams
C. 30 grams
D. 60 grams
Use the chemical reaction to answer the question. Fe+O2→Fe2O3 What happens to atoms of Fe and O2 during the reaction?
A. They are lost.
B. They maintain their properties.
C. They are rearranged.
D. They gain mass.
What is most likely to occur during a chemical reaction?
A. Molecules of the original substance are lost.
B. Mass is conserved.
C. The original substance maintains its properties.
D. New atoms are created.
Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda (NaHCO3) and acetic acid (HC2H3O2) to produce a chemical reaction shown.
Which statement about the reaction is correct?
A. There are more H atoms after the reaction.
B. The atoms of the reactants are regrouped during the reaction.
C. Atoms of Na are destroyed during the reaction.
D. Some atoms gain mass after the reaction.
Use the chemical reaction to answer the question. 2H2+O2→2H2O There are four atoms of hydrogen (H) before the reaction.
How many atoms of hydrogen are present after the reaction?
A. 5
B. 4
C. 2
D. 8
PLEASSSSSSSE ANSSSSWER ALL THE QUESTIONS------------
Answers
2.)B
Explanation:
The total mass of products obtained in the reaction; CaCO3→CO2+CaO is 30 grams. Given the reaction; Fe+O2→Fe2O3, atoms of Fe and O2 are rearranged during the reaction. During a chemical reaction, mass is conserved. Given the reaction NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2, we can see that the atoms of the reactants are regrouped during the reaction. Given the reaction 2H2+O2→2H2O, there are four atoms of hydrogen before and after the reaction.
According to the law of conservation of mass, atoms are neither created nor destroyed in a chemical reaction. Similarly, mass is neither created nor destroyed.
This means that the number of atoms of each element before and after the reaction must remain the same. A chemical reaction only involves the rearrangement of atoms in reactants to form products.
The total mass of reactants must be equal to the total mass of products according to the law of conservation of mass.
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help me with this I only have one more
1156 g/L
= ________ kg/mL
Answers
The Answer is 0.001156.
1156 g/L = 1.156 kg/L
Since 1 L is equal to 1000 mL, we can convert kg/L to kg/mL by dividing by 1000:
1.156 kg/L = 1.156/1000 kg/mL
1.156/1000 kg/mL = 0.001156 kg/mL
Therefore, 1156 g/L is equal to 0.001156 kg/mL.
What happened when the two substances were combined together in the cup? (highlight one)
The substances changed into different substances.
The substances did not change into different substances.
I am not sure if the substances changed into different substances.
Explain your answer using evidence from the Sim.
Answers
Based on evidence from Sim, when two substances were combined they did not change into different substances.
Here the word Sim is used to describe the process simulation. Simulation is defined as when two substances combined they do not change into different substances.
They just combine together and form a new substance.
Let us understand it as the first substance is liquid and the second substance is solid then when we combine both of them they form a new mixture but do not change their property.
The mixture is still liquid but it also has some properties of solid substance.
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The substances did not change into different substances.
Based on the information provided in the question, there is no evidence or indication of any chemical reaction or change in the substances when they were combined in the cup. The question does not mention any observations or effects that would suggest a chemical transformation.
If there were a chemical reaction or change, it would typically be accompanied by observable signs such as color change, gas production, temperature change, or formation of a precipitate. However, since the question does not provide any evidence or observations of such changes, we can conclude that the substances did not undergo any chemical transformation when combined.
It is important to note that without additional information or details about the substances and their behavior, it is not possible to make definitive conclusions. However, based on the given information, the most reasonable conclusion is that the substances remained unchanged when combined in the cup.
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You eat a sandwich. What molecule does your cells need from this sandwich, and how does that molecule get from the sandwich to your cells?
Don't look anything up
Answers
Answer:
in a sandwich ELISA, the goal is to use antibodies to precisely quantify specific antigen present in a solution, such as antigen from a pathogen, a serum protein, or a hormone from the blood or urine to list just a few examples. The first step of a sandwich ELISA is to add the primary antibody to all the wells of a microtiter plate
Explanation:
Brainliest please
Jenna notices that the speed of the wind has increased throughout the day. What is causing the faster wind?
There has been no precipitation.
The difference in air pressure has decreased.
The difference in air pressure has increased.
The direction of the wind has changed to the south.
Answers
The speed of the wind has increased throughout the day as there has been no precipitation.
What is precipitation?Precipitation is a process in which vapor of liquid changes into small droplets.
In the day time temperature of the atmosphere is high as compare to the night, so rate of precipitation is low at the day time due to which speed of the wind has increased as compare to the night time.
Hence, option (a) is correct i.e. there is no precipitation.
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Answer: C
Explanation:
In an electrical wire, if instead of copper, plastic wire is used. Would it conduct electricity?Justify your answer.
Answers
Answer:
No, a plastic wire would not conduct electricity. This is because plastic is an insulator that does not allow electric current to flow through it. In a wire, electrical conductivity is provided by the movement of charged particles - typically, electrons. Copper is an excellent conductor of electricity because it has a high number of free electrons that are not bound to atoms and can move through the wire very easily. However, in a plastic wire, the tightly bound electrons of its atoms do not allow for the free flow of charges, thus preventing the passage of electric current.
People use hot air balloons to rise high above the ground and be pushed by air currents from one place to another. The diagram shows a hot air balloon.
A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners.
a. Describe a likely result of this chemical reaction that allows a hot air balloon to rise.
b. Describe a design feature the distance a hot air balloon can travel. Explain your reasoning.
Answers
Fueled by propane cylinders, gas jets produce the hot air that fills the envelope (similar to ones you might use on a portable camping stove).
WorkingSince heated air rises, hot air balloons are functional. with the rest. As though it were floating in water, the balloon rises as a result of this. The balloon naturally starts to slowly deflate if the air is allowed to cool.The molecules in the air start to migrate and spread out as the air within the balloon is heated, which results in a decrease in the air's density. The heated air is pushed below the cooler, surrounding air. the warm air is pushed upward as a result of this.For more information on hot air balloon kindly visit to
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Help me please????? :,/
Answers
Answer:
Explanation:
I think its the fourth one- sound waves and light waves need to change places
Which option is an example of a chemical property?
melting point
density
ability to decompose
color
Answers
The ability to decompose
Explanation:
A property is a chemical property when it changes the chemical structure of a substance after a reaction.
Density and color are both physical properties.
Even though melting point may seem like a chemical property, when something melts, only the physical state changes, and the chemical structure does not change, and therefore, is a physical property.
The ability to decompose is a chemical property. When something decomposes, the chemical structure of many molecules change, and therefore, is classified as a chemical property.
What are some causes of climate change?
Answers
When energy from the Sun reaches the air above land, the air warms and rises. Along a coastline, cooler air above the ocean flows toward the land to replace this rising air. Which of the following best describes these processes?
A. Conduction and Convection
B. Radiation and Convection
C. Conduction and Radiation
Answers
I NEED HELP ASAP PLZZZZ
Answers
Answer: 2 :)
Explanation:
I took the test
are you made out of copper and tellurium?
Answers
Answer:
i think i'm made of mud and dirt.
Explanation:
please help me
Select items from the list below that are NOT characteristics of invasive species. Hint: there are four (4).
A. only plants
B. only animals
C. can be plants or animals
D. harmful to ecosystems
E. support biodiversity in ecosystems
F. have unique adaptations
G. come from the local environment
H. come from other parts of the world
I. introduced intentionally
J. introduced by accident
Answers
Someone please help me if right I’ll give you 5$
Answers
Answer:DId you even read it you have to that in your lab class and says you need other information aint no way i can answer that
Explanation:
piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap
Answers
Answer: Food
Explanation:
The rat smells the food or sees the food it goes towards the food to eat it.
Which best describes the two ways that energy is measured
A. In convection and in temperature
B. In temperature and in radiation
C. In radiation and in convection
D. In wavelength and in temperature
Answers
Answer:
D. in wavelength and temperature!
Explanation:
The energy has been the strength and the viability of the substance and has been measured as wavelength and temperature.
What is energy?
Energy can be defined as the ability of the substance to perform work. The work done has the unit of measurement Joule.
The energy has been the representation of the randomness and the physical and mental system of the substance.
Thus, the temperature has been the measure of the amount of physical energy and the wavelength as the energy of the radiations.
Thus, the energy can be best measured with wavelength and temperature. Hence, option D is correct.
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Even though the iceberg and the water that surrounds it are made up of the same substance, the iceberg is able to float. Why is this?
HELP ME PLZ!!
Answers
Answer:
Because ice contains some air in it.
G
A substance occupies one half of an open container. The atoms of the substance are closely packed but are still
able to slide past each other.
What is most likely the phase of the substance?
gas
liquid
solid and gas
O liquid and solid
Mark this and return
Save and Exit
Next
Submit
Answers
Answer:
Solid and gas
Explanation:
What color element symbol designates elements that are a gas at a given temperature?
Answers
What happens to the atoms that make up hydrogen fuel as it burns?
Answers
Answer:
When hydrogen fuel burns, its atoms combine with oxygen atoms in the air, which creates a chemical reaction that releases energy in the form of heat and light. The hydrogen atoms lose their outermost electrons, becoming positively charged ions (protons). These ions combine with the oxygen atoms to form water molecules (H2O), which evaporate into the air as steam. Therefore, the atoms that make up hydrogen fuel ultimately become part of water molecules during the process of combustion.
Explanation:
Which body system carries nutrients to the cells of the body?Answer options with 5 optionsA.circulatory systemB.digestive systemC.muscular system. D respiratory systemE.skeletal system
Answers
Answer:A. Circulatory system
Explanation:
After food get digesting the The nutrients gets transported to cells by the blood stream.
Which statement best describes how energy and matter move in a wave?
A
A wave transports matter without transporting energy.
B
A wave transports energy without transporting matter.
C
Both energy and matter are transported by a wave.
Answers
The following statement which best describes how energy and
matter move in a wave is both energy and matter are
transported by a wave.
What is a Wave?A wave is a disturbance that travels through space-time which
is accompanied by a transfer of energy.
Wave motion also results in the displacement of matter but in a
very minimal manner which makes the Option C the most
appropriate option.
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How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
Kiley wants to balance the equation H2 + N2 → NH3. Which would be her first step in balancing an equation?
Answers
Answer: The balanced equation will be
6H2 + N2 → 2NH3
Explanation:
First step is to balance nitrogen
ie, H2 + N2 → 2NH3
Second step is to balance hydrogen accordingly
ie, 6H2 + N2 → 2NH3
This is the perfect balanced equation.
Answer:
c
Explanation:
c
Organize it fossil
If somebody knows the answer please tell me
Answers
Answer:Carbon-14 dating is second column tho
Explanation:So i remember doing this in 5th grade at my school so if u send me ur email i. can try send you my labs i hate doing them.
Human obtain electricity through fossil fuel, nuclear, solar, geothermal, wind, biomass, and hydroelectric power.
For at least two of these, explain ways that using this resource could pollute freshwater.
Answers
For fossil fuel: Oil spills and leaks during extraction or transport can pollute water sources.
For nuclear power: An uncontrolled nuclear reaction can result in widespread a contamination of water.
Write a lab report on the lab ¨How do the process of conduction, convection, and radiation help distribute energy on earth.¨ for edge 1. Purpose- state the purpose of the lab.
2. Hypothesis- (Use if, then, because in your statement)
3. Materials- list all materials used in the lab
4. Procedures- state step by step what is being done in the lab
5. Observation/data- state what is being measured
6. Analysis/conclusion-state by summing up what was done in the lab and evaluate your
hypothesis with what actually happened
Answers
Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions
Explanation: