Why is it necessary to maintain excess bromine in the reaction mixture with trans-cinnamic acid and bromine
Answer:
It is necessary because Trans-cinnamic is a limiting reagent in the mixture reaction while Bromine is the excess reagent
Explanation:
It is necessary to maintain excess bromine in the reaction mixture because Bromine is the excess reagent in the reaction mixture and if it's quantity is less it would consume the limiting reagent ( Trans-cinnamic ) completely . hence Bromine should maintain excess quantity in the reaction mixture
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Which statement about the manufacture of aluminium by electrolysis is correct?
А Aluminium ions are oxidised to aluminium by gaining electrons.
B Aluminium is extracted from its ore hematite. .
с Molten cryolite is used to dissolve the aluminium oxide.
D Oxygen is formed at the negative electrode.
Molten cryolite is used to dissolve the aluminum oxide is correct.
What is electrolysis?
Electrolysis is a process used to split molecules by passing an electric current through a solution containing ions. It works because the ions in the solution are attracted to the opposite charge of the electrodes in the electrolysis cell. The ions travel towards the electrodes and are either removed from the solution (oxidation) or released into it (reduction). This process is used in a variety of industries, such as metals refining, wastewater treatment, and electroplating.
The process of extracting aluminum from its ore, usually bauxite, involves electrolysis. In this process, the ore is dissolved in molten cryolite and an electric current is passed through it, leading to the oxidation of aluminum ions at the anode and the reduction of oxygen at the cathode. The aluminum is then extracted as a molten metal.
Therefore, option C is the correct answer.
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Balance equation Co2(CO3)3(s)=Co2O3(s)+CoO2(g)
Answer:
answer
Explanation:
explination
Nitrogen is an element. What is the smallest particle of nitrogen that has all the properties of nitrogen?
Answer:
The structure of the atom.
Explanation:
The correct answer is - The structure of the atom.
Reason -
An atom is the smallest unit of matter that retains all of the chemical properties of an element.
How many molecules are in 6.25 grams of N2O5?
Answer:
0.0578647982046175
Explanation:
I have to create an energy transformation digital poster so if you have already done it show me yours or help me :(
In this assignment, you will research the relationship between different types of energy when energy is being transformed. You will present your findings in the form of bar graphs or pie charts that show the forms of energy at different times in the process.
Answer: Did you finish this poster?
its due today and i forgot all about it
Explanation: Ill pay on cashapp if anyone has this project
Answer:
I can help a little you can do the sun witch transfers energy to so many things
1929 cm3 of gas is how many L of gas
Answer:
1.929 Liters of gas
Explanation:
If you were able to see what was happening with the molecules of two liquids of
the same amount but with different thermal energies, what would you see?
Answer:
In a gas, the distance between molecules, whether monatomic or polyatomic, is very large compared with the size of the molecules; thus gases have a low density and are highly compressible. In contrast, the molecules in liquids are very close together, with essentially no empty space between them:
if you were to slowly add 0.3 M NaOH to 35 ml if 0.23M HCl how many ml of NaOH solution would be needed to reach the equivalence point??
M1V1 = M2V2
M1 = 0.23 M HCl
V1 = 35 mL
M2 = 0.3 M NaOH
V2 = ?
(0.23 M)(35 mL) = (0.3 M)V2 —> V2 = 27 mL NaOH
does anyone have the answers to the American Association of Chemistry Teachers What makes something feel hot or cold ?
Answer:
thermoreceptors
Explanation:
thermoreceptors detect temperatures. we are equipped with some that are activated by cold and some that are activated by hot
Which two characteristics describe all animals
All animals can be dangerous and they would fight for their family. (This might be wrong)
I like a guy and my parents think he likes me but I don't know what to do, help me
Answer:
maybe try to tell him how you feel??
Explanation:
Can someone please help me with the gizmo please
message me if your willing to help :(
Answer:
airing Your GizmoWatch to the GizmoHub App 10. Register ... NOTE: If any component is missing, please contact the store ... Gizmo Buddies can text the GizmoWatch ... Tap Kids to access your child's full profile. If you have more than one child, swipe left or right to ... portable devices with LCD panels may be used to help.
Explanation:
Consider an everyday activity in which energy changes from one form to another. Describe the form that energy takes before and after the change.
An everyday activity that involves energy changes from one form to other is : Switching on if light bulbs.
From Thermodynamics law, there can be transformation of energy from one form to the other.When a bulb is switched on, the electrical energy in that bulb will be converted to thermal energy as well as light energy which enable us to use it at home.We can conclude that energy can be transformed to other forms.
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This resource produces the most energy for the smallest amount of resources.
Which one of these is it?
Coal
Oil
Natural Gas
Biomass
Wind
Geothermal
Hydroelectric
Nuclear
Solar
Tidal
Answer:
wind
pollution free no use of resources
Wind resource produces the most energy for the smallest amount of resources. Hence option 5 is correct.
What are resources?Resources are defined as a type of physical substance, like land, air, or water, that people value and require. A resource can be classified as renewable or nonrenewable based on whether it can replace itself at the rate it is used up or whether it has a finite supply. When people cherish natural resources, they become resources themselves.
Renewable energy sources like sun and wind don't consume fuel and emit no greenhouse gases. They are much more efficient at converting energy into electricity, producing less waste and cost-saving results. With 83% of the world's electricity coming from renewable sources, hydroelectric energy is by far the most common.
Thus, wind resource produces the most energy for the smallest amount of resources. Hence option 5 is correct.
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Chemistry Stoichiometry Question
If the hydrogen ion concentration, [H+], in a solution is 2.65 x 10-2 M, what is [OH-]?
Answer:
A
Explanation:
If the hydrogen ion concentration, [H+], in a solution is 2.65 x 10-2 M, then [OH-] will be 3.77x 10-13 M
What is hydrogen ion concentration?
Hydrogen ion concentration is the factor that determines the acidity of water.
Given,
[tex]H^+=2.65*10^-^2[/tex]
To find the concentration of [OH-].
It is known that,
[tex][H^+]*[OH^-]=1*10^-^1^4[/tex]
[tex]OH^-=\frac{1*10^-^1^4}{2.65*10^-^2}[/tex]
[tex]OH^-=3.77*10^-^1^3[/tex]
Thus, the correct answer is 3.77x 10-13 M.
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(Ch3ch2)3ch diagram
Predict the product of
Fe(NO₃)₃(aq) + CaSO₄(aq)
Answer:
DOUBLE DISPLACEMENT (mutual exachange of ions in aqueous form)
Ca is more reactive than Fe
hence it will displace Fe from ferrous nitrate solution and form Calcium Nitrate and Ferrous Sulphate will be formed
GOOD LUCK WITH THE FUTURE! :)
Substance P is carbon.
Suggest what substances Q and R could be. Give their names.
substance Q .......................................................................................
substance R .......................................................................................
Explanation:
substance Q could be oxygen (O2)
substance R could be carbon dioxide (CO2)
Substance Q could be oxygen ([tex]O_2[/tex])
Substance R could be carbon dioxide ([tex]CO_2[/tex])
What are molecules?The smallest particle of a substance that has all of the physical and chemical properties of that substance.
There are 2 oxygen atoms in 1 molecule of oxygen. It is a di-atomic gas.
Carbon dioxide is a chemical compound composed two oxygen atoms covalently bonded to one carbon atom.
Hence, substance Q could be oxygen ([tex]O_2[/tex]). substance R could be carbon dioxide ([tex]CO_2[/tex])
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Which detail shows ways that people can help stop Asian carp from spreading?
a
To escape threats, it can jump out of the water. These large, jumping fish can injure boaters and skiers. They can also damage boats and boating equipment
b
Releasing even a few carp into a body of water can become a huge problem. Carp lay hundreds of thousands of eggs. These eggs wash away in fast moving water.
c
These plants also provide safe places for the native fish to hide and lay eggs. Some carp eat snails and mussels that are endangered.
d
Throw unwanted bait into the trash, not water. Do not release fish from one body of water into another. Tell authorities when someone catches an Asian Carp.
So this is asking how they can stop the carp from spreading. A. is talking about the asian carps jumping out of water damage boats but this has nothing to do with what we can do to stop them from spreading!! B. Is saying how when you release the carp into a body of water can cause them to spread even more! so that isnt what we need. C. Is about how plants provide safe places for carps to have more carps and that's what we are trying to stop D. This is saying that we can throw bait we dont want in the trash not the water so when somebody catches an asian carp people know and can not release any more fish to the body of water .
D. - Makes the most sense because it talks about what people can do to stop the spread of the invasive species The Asian Carps
3.) Plants make food through photosynthesis, and photosynthesis takes place mostly in plant in plant leave, but when plants lose their leaves in winter, they don’t die.
This is evidence that
A. Someone gives the plant food everyday.
B. Plants store food later use.
C. Plants can use heat in the ground to make food.
Answer:
B
Explanation:
List the number of protons, neutrons, and electrons in titanium
P-
N-
E-
Answer:
P- 22
N-26
E-22
A student bends a paperclip rapidly back and forth. When he touches the point where he was
bending the paperclip, he finds that its temperature has increased. This indicates that the
atoms in that part of the paperclip have increased in what kind of energy
Answer:
conservation .
Explanation:
Help please!!!!!!!!!
Answer:
D. Element
Explanation:
Fe is an element. It isn't more than one element chemically combined (compound), it isn't a charged particle (ion), and it isn't the smallest possible unit of multiple atoms combined together (molecule).
what is the chemical formula for cuprous nitride
Answer:
Cu[NO(down arrow)3]^2
Explanation:
3 is a subscript and 2 is an exponent.
A 200.0 ml quantity of 0.9 M HCl was titrated with an NaOH solution to reach the equivalence point. The goal was to determine the concentration of the NaOH solution. if 23.9 ml if the NaOH solution was required, what was the [NaOH]???
Since the acid and base react in a one to one ratio, you can use the equation M1V1 = M2V2 to solve for M2, or the molarity of NaOH.
M1 = 0.9 M HCl
V1 = 200.0 mL HCl
M2 = ?
V2 = 23.9 mL NaOH
(0.9 M)(200.0 mL) = M2(23.9 mL) —> M2 = 7.53 M NaOH
How many milliliters are in a 30 gallon drum?
Answer:
113562 milliliters are in a 30 gallon drum
Explanation:
because you have to convert gallons into milliliters
could you put my answer as the brainist!!!!!!!
PLEASE ANSWER ALL QUESTIONS WILL MARK BRAINLY
1. Calculate the density for the following cube if it’s mass is 1.25 g and each side has a measurement of 3 cm.
2. Would the cube in question 1 float or sink in water? ( Calculate the density for the following cube if it’s mass is 1.25 g and each side has a measurement of 3 cm.)
3. If an irregular-shaped piece of gold is placed into a graduated cylinder and it displaces 15 ml of water, what is the volume of the object?
4.How many elements are in the particle with the chemical formula C2H7N3?
5.How many atoms are in the particle with the chemical formula C2H7N3
Answer:
1. 2.89
2. Will it float in fresh water? Yeah, sure it will!
3. 5g/ml
4. 3 because the letters represent the elements
5. 12
Explanation:
50 points Use the drop-down menus to select the names of the labeled structures.
A:
B:
C:
D:
Answer:
A: PistilB: sepalC: petal
D:stamen
Answer:
Pistil
sepal
petal
stamen