HELP ASAP PLEASE PLEASE PLEASE Complete and balance the following reaction. Note that Cr forms +3 in the product. ____ Sn(NO3)2 (aq) + ____ Cr(s) → ____ _________ ( ) + ___ _________( ) b) How do the oxidation states of Sn and Cr change during the reaction? Sn changes from ___ to ____ and Cr changes from ____ to ____ c) Determine the net ionic equation including phases. d) Identify the oxidizing and reducing agents (give formula of compound, ion or element): OA = _____ RA = _____ e) Write the oxidation half rxn.
Answers
Answer:
Explanation:
3Sn(NO3)2 (aq) + 2Cr(s) → 2Cr(NO3)3(aq ) + 3Sn(S )
Related Questions
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.
A hammer and a feather are dropped from the same height by an astronaut on a planet without air. Which value will be different for the two objects?
A. The velocity of the objects
B. The time it takes for them to fall
C. The downward pull of gravity
D. The upward push of air resistance
Answers
Answer:
C
Explanation:
Gravity applies in the same way to all objects. A and B are not correct since all objects fall at the same velocity independent of other factors. Since there is no air, D cannot be correct.
The hammer and the feather will differ in air resistance.
What is air resistance?The term air resistance has to do with the opposition offered to the movement of an object by air. This opposition offered depends on the weight of the object.
We know from the experiment of Gallileo that all objects have the same acceleration due to gravity but they do differe in air resistance hence the hammer and the feather will differ in air resistance.
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Would the following atoms have similar reactivity?
A) Elements in Group 2 have 2 energy levels.
B) Elements in Period 7 have 7 valence electrons.
C) Elements in Group 13 have 13 valence electrons.
D) Elements in Group 13 have 13 valence electrons.
Answers
Which of the following is a biotic factor in a biome?
a
kinds of birds
b
amount of rainfall
c
types of rocks
Answers
Answer:
i guss c is answer in my ......
Answer:
a kind of birds is a biotic factor
help. help. help. help. -_- please help me. im desperate. literally.
Answers
Answer:Post this to the collage or higher level Desperately
Explanation:
The graph below shows the motion of a car.
What is the average speed of the car between 0 and 8 seconds to the nearest hundredth in m/s?
Answers
Which of the following problems would be a direct result of humans building along the ocean shore zone?
A. the erosion of the sand and soil from the shoreline
B. sand dunes and vegetation being disturbed
C. the movement of sand from one place to another
D. sand being washed away over long periods
Answers
Answer:
I think it is B.
Explanation:
The erosion of the sand and soil from the shoreline would be a direct result of humans building along the ocean shore zone. When humans build structures along the shoreline. This can lead to increased erosion of the shoreline and loss of the beach.
Building along the ocean shore zone can have several impacts on the natural environment. One of the direct impacts is the erosion of the sand and soil from the shoreline. This occurs because construction can disrupt the natural processes that maintain the beach, such as the movement of sand and the protection provided by vegetation.
For example, building seawalls or other structures can prevent the natural movement of sand and sediment along the beach. This can lead to erosion of the shoreline, as the sand is no longer able to accumulate in areas where it is needed to protect the shoreline. These plants help to hold the sand in place and protect the beach from erosion.
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Hello, could you help me to answer this question. Thank you very much, it would save me!
Answer the question, "Why is it best to put subscripts next to the symbols in the density and solubility formulas?"
Answers
The number of atoms of each kind is indicated by a subscript following the atom. If there is only one atom, no number is written. If there is more than one atom of a specific kind, the number is written as a subscript following the atom.
What type of energy is torque?
A
wind energy
B
rotational energy
C
potential energy
D
chemical energy
Answers
Answer:
I think It's B. rotational energy . Or if not then A. wind energy
Explanation:
I searched up the definition of Torque and it said "Torque is a twisting force that speaks to the engine's rotational force and measures how much of that twisting force is available when an engine exerts itself." Tell me if I'm wrong. :))
Torque is the rotational type of energy. Therefore, option B is correct.
What is torque?The force that can cause an object to rotate along an axis is measured as torque. Similar to how force accelerates an item in linear kinematics, torque accelerates an object in an angular direction.
The work-kinetic theorem for rotation states that the change in rotational kinetic energy is equal to the sum of all torques operating on a rigid body while it rotates along a fixed axis.
The force that can cause an object to rotate along an axis is measured as torque. Similar to how force accelerates an item in linear kinematics, torque accelerates an object in an angular direction.
Thus, option B is correct.
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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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What are the differences and similarities between radiometric dating and relative dating?
Answers
Answer:
Relative Dating method- determining the relative age of a fossil/rock.
Radioactive Dating method- determining the absolute age of the fossil/rock.
Explanation:
Relative dating is based on other items found near the fossil, while radiometric dating is based on the fossil itself.
List examples of organisms from the movie that represent each of the six kingdoms. Monera (Archaebacteria/Eubacteria): Protista: Fungi: Plantae: Animalia
Answers
Answer:
since the movie was unlisted, i'm unable to provide you with a proper answer? sorry
Explanation:
1) Archaea / Bacteria
2) Protists
3) Fungus
4) Plant
5) Animal
The wastewater in your home goes to one of three places. It can run into a home septic system, it can go to a centralized sewage treatment plant, or it might be directly discharged into a body of water. Where does your water go after it goes down the drain?
Answers
What solutions would you propose to a car manufacturer if its car rated poorly in a crash test? Please explain your answer.
HELP ME PLS
Answers
Answer:
A solution might be reinforcing the car pillars even more (pillar A, B, C, D) to prevent injury to the key components in the vehicle as well as keeping the driver/passenger safe. Another solution might be switching to a more car frame and/or reinforcing it.
Explanation:
Car pillars are designed to take most of the damage in the event of a crash/collision which means poor car pillars could result in a bad car crash test. Same sort of deal with a car frame needing to be upgraded as well.
I WILL GIVE YOU BRAINLIST PLS DOOOOOO
Which of these is a characteristic of index fossils?
Found in the topmost rock layer
Found in many layers of the same rock
Have already established relative age
Are limited to a particular geographic location
Answers
Answer: It is the third one.
Explanation:
An index fossil is something that a human can estimate the age of the fossil by looking at it.
Index fossils are distinct in nature and recognisable. It is also widely present across the world. It is abundant and found everywhere.
Methane (CH4) combines with oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O). Describe the number and type of atoms for a molecule of each substance.
HELP (thanks if you give a good/correct answer)
Answers
Answer:
A molecule of methane (CH4) contains 1 carbon atom and 4 hydrogen atoms. A molecule of oxygen gas (O2) contains 2 oxygen atoms. A molecule of carbon dioxide (CO2) contains 1 carbon atom and 2 oxygen atoms. A molecule of water (H2O) contains 2 hydrogen atoms and 1 oxygen atom.
Which statement explains the difference in chloroplasts between the two types of plant cells?
A.
The leaf cells have larger chloroplasts because leaf cells need more support and a stronger structure.
B.
The root cells have smaller chloroplasts because root cells do not need to store food and water.
C.
Unlike the leaf cells, the root cells have no chloroplasts because root cells do not need to produce or use energy.
D.
Unlike the root cells, the leaf cells have many chloroplasts because leaf cells produce sugars for the plant.
Answers
Answer:
A
Explanation:
I think it a because it seems more like the right answer
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
What was the dependent (outcome) variable from this experiment?
The paper airplane design.
The number of paperclips.
The type of paper.
The distance the plane flies.
Answers
Answer:
The distance the plane flies.
Explanation:
This is the dependent (outcome) variable because it is changing depending on the number of paper clips that are added to the plane.
Answer:
The distance the plane flies.
Explanation:
Winds, ocean currents, storms, and hurricanes all begin with the _____ heating of the Earth by the Sun.
gravitational
even
magnetic
uneven
Answers
Answer:
Gravitational
Explanation:
I pretty sure it's Gravitational correct me if I'm wrong.
It is uneven because the Earth rotates around the sun. During its rotation, some parts of the earth don't receive sunlight so the heating is uneven
When potassium metal is added to water, a violent reaction occurs that releases a tremendous amount of light and thermal energy. This is an example of an _________ reaction.
1). endothermic
2). exothermic
Answers
Answer:
An Exothermic reaction.
Explanation:
An exothermic reaction produces heat, while endothermic reactions absorb heat
The formula for calculating density, D, is D=M/V, where M represents mass and V represents volume.
For liquids, volume is often given in cubic centimeters (cc), which is the same as cm 3. If the density of an unknown liquid is 1.6 g/cc, what is the mass of 800 cc of the unknown liquid in grams (g)?
0.002 g
1.6 g
500 g
1280 g
Answers
Answer:
The answer is; D
Explanation:
Density 1.6g/cc means that every 1(one) cubic centimeter of the liquid has a mass of 1.6 grams.
Then, what about 800 cubic centimeters – how much mass, in grams, will it have ?
= 1.6 * 800 = 1280 g
For current or former high-achieving, overachiever, perfectionist, and hard-working students: What are three things you wish you could tell your younger, high-achieving self or other school kids who also have the same work ethic as you (basically other young perfectionists)? Multiple people can answer, and I will be marking brainliest on whoever has the best answer.
Answers
Answer:
i dont know
Explanation:
I'm sorry i needed points for my own question! I only had 8:( sorry
Which statement best describes how energy and matter move in a wave?
A
A wave transports energy without transporting matter.
B
A wave transports matter without transporting energy.
C
Neither energy nor matter is transported by a wave.
Answers
Answer:
A wave e transports energy without transporting matter
Answer:
the answer is A. a wave transpory energy without transporting matter
can someone please help me ill mark brainliest and lots of points please help me someone that likes helping people please help mee thank you
Answers
Answer:
1) B and 2) D
Explanation:
when scientists refer to the naked eye, it is referring to the eye without any sort of magnifying device, such as a microscope. Algae blooms can result naturally or by human interference
a major use of magnesium oxide is as a refractory material.
explain in terms of structure and bonding, why magnesium oxide has a very high melting point.
[ this is 4 marks, please provide a good answer ]
[ giving brainliest + thanks on profile ]
Answers
Sodium oxide has a high melting point because of the strength ofits bonds. Due to having strong bonds, they cannot be broken veryeasily. Magnesium chloride is ionic compound. There is a strong electrostatic force of attraction between 2 chloride atoms and 1 magnesium atom.
Because it retains its strength at very high temperatures. It is considered a refractory material with a melting point of 6500 degrees F. It is also very non-reactive with other materials that might be put into the furnace and is even used to make crucibles - containers used to melt other substances.
The strength of ionic bonds usually depends on two factors - ionic radius and charge. Mg+2
and O−2 have charges of +2 and -2 respectively. This is larger than the charges of other ions like Na+ or NO-3. Magnesium ions and oxygen ions also have small ionic radius. Magnesium is in period 3 so its ion is smaller than that of calcium or barium. Oxygen ion is smaller than sulfide and fluoride. The smaller the ionic radii, the smaller the bond length and the stronger the bond. Therefore the ionic bond between magnesium and oxygen is very strong.
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.
Keesha performed a chemical reaction and the products looked quite different from the reactants. She knew the amount of matter had not changed due to the law of conservation of mass. According to the law of conservation of mass, what happens in a chemical reaction?
Answers
Answer:
matter can't change, but mass can differ
Explanation:
so i don't know what the answer would be so have fun with this
Answer:
matter is not created or destoryed and the amount of mass may change after the reation
hope this helps
Explanation:
Help me please??????? :/
Answers
Rarefaction: B
Wavelength: C
2. B
3. C
yw !!!
Match the terms and the definitions Lesson 3.04 Question 6 options:
1.
The earth is in a position so that the North Pole is tilted most directly toward the sun.
2.
The tilt and revolution of the earth as it moves around the sun cause
3.
This is the day of the year with the least amount of daylight, which is due to the tilt of the earth's axis.
4.
Days and nights are equal length, and the noon sun is directly overhead.
Equinoxes
Winter Solstice
Summer Solstice
seasons
Answers
Answer:
1- Summer Solstice
2- Seasons
3- Winter Solstice
4- Equinoxes
explain why the reactivity of group 1 metals increases as you go down the group.
Answers
Answer:
This is because the energy levels increases as you move down the group
Explanation: