Answer:
A. 35Cl1-
Explanation:
Chlorine needs 1 more electron to have full octet thus will take 1 electron and possess a -1 charge.
an 80kg skateboard moving at 3m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is her change in kinetic energy as a result
Explain what environmental bias means. What are the categories that
make up environmental bias? How does environmental bias relate to
chemistry?
Answer: Environmental bias can be defined as the idea that suggests a group of people being living in the environment which is harmful for them.
Explanation:
There are three categories that make up the environmental bias there are socio-cultural choice, occupational choice, and personal choice.
The environmental bias can be related to chemistry as chemical lab is an area prone to chemical (acid, alkali) and fire so produced in reactions thus prone to accidental hazards not safe for working of people. But people like to work in chemical lab due to their personal and occupational choice.
Compare the wavelength and energy of ultraviolet rays to visible light
Answer:
Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light.
Ultraviolet is shorter wavelengths than violet.
Hope This Helps.
Convert to standard notation.
8.127 x
10-4
Answer:
0.0008127
Explanation:
This is easy
Someone please help me with the second question ONLY
Answer:
no
Explanation:
this experiment could not be replicated, because there are no specific measurements. the details would not be the same because it does not include the type of paper used nor the diameter, width or length. A guess of the measurements would be the only way to replicate this experiment but other then that, no you cannot.
The United States consumes more oil per day than any other country. What would most likely happen to oil prices and availability worldwide if the United States were able to switch immediately to synfuels such as liquefied coal?
A. Oil prices would increase, and availability would increase. B. Oil prices would increase, and availability would decrease.
C. Oil prices would decrease, and availability would increase.
D. Oil prices would remain the same, and availability would increase.
E. Oil prices would remain the same, and availability would remain the same. PLEASE HURRY!!
Answer:
Oil prices would decrease, and availability would increase
Explanation:
During chemical reactions the bonds between atoms break and new bonds form.
Energy must be absorbed to break a bond, so breaking bonds is endothermic.
Making new bonds is exothermic because energy is released.
a) When green copper carbonate decomposes, the equation is:
CuCO3 CuO CO2
copper carbonate copper oxide carbon dioxide
Is the reaction exothermic or endothermic? Use ideas about bonds to explain why.
Answer:
The equation is CuCO₃ ⇆ CuO + CO₂. So it's a decomposition reaction, so a solid broke down into two other substances. This means that bonds were broken, so the reaction must be endothermic.
Geetha took some grains of boiled rice in test tube A and Tina took boiled and chewed rice in test tube B. Both of then poured 1-2 drops of iodine solution into the test tubes. What would they have observed? Give a reason for your answer.
Answer:
Test tubes A and B turn a darker blue color.
Explanation:
Based on the information provided in the question it can be said that they should have noticed that Tube A and Tube B turned a dark blue color. This is because the starch turns the solution in the test tubes into a dark blue color due to the negative reaction caused by the conversion of starch present in salivary amylase
A.
B.
C.
D.
what could be the correct answer? Help me please
Answer:
A
Explanation:
Answer:
a
Explanation:
In an electrolytic cell, which ion would migrate
through the solution to the negative electrode?
(1) a chloride ion
(3) a bromide ion
(2) a silver ion
(4) a fluoride ion
Answer:
Silver ion
Explanation:
In an electrolytic cell, the positive ions known as the cations migrate to the negative electrode, the cathode where they accept electrons to become discharged as neutral atoms. Also, the negative ions known as the anions migrate to the positive electrode, the anode, where they give up their electrons to become discharged as neutral atoms.
From the question above, the only positive ion among the options given is the silver ion, Ag+, therefore, it is the correct option.
9.0 L of a gas at 25 oC expands to a volume of 25.0 L. What is the resulting temperature in Kelvin?
Answer:
Explanation:
H
What is the pH of a 6.4x10^-10 m OH- solutions
Answer:
pH: 4.80617997398
pOH: 9.19382002602
[H+]: 1.5625E-05
[OH-]: 6.4E-10
ACID
Hope it helps :)
what is the mass of 3.01x1023 atoms of iron(atomic mass of fe=56)
Answer:
N = n× l
N = number of entities
n= moles
l = Avogadro's constant = 6.023 × 10^23
3.01 × 10^ 23 = n * 6.023 × 10^23
n = 3.01 × 10^23/6.023 × 10^23
n= 0.5moles
Molar mass = mass/ number of moles
Molar mass = 56
mass = 56 × 0.5
= 28g
Hope this helps.
Draw an alkyl bromide with proper stereochemistry that can be used to synthesize the given alkene as the exclusive product via an e2 reaction.
Answer:
See explanation below
Explanation:
You forgot to put the picture to do so. In this case, I manage to find one, and I hope is the one you are looking for. If not, then post it again and I'll gladly help you out again.
According to the picture with the answer, we have a cyclohexane with 4 methyl groups there. Two of them are facing towards the molecule with a darker bond. This means that the alkyl bromide, should have a bromine in one of the bonds, and in order to produce an E2 reaction, this bromine should be facing in the opposite direction of the methyl groups which are facing towards. This is because an E2 reaction occurs with the less steric hindrance in the molecule. If the bromine is in the same direction as the methyl group, it will cause a lot more of work to do a reaction, and therefore, an E2 reaction. I will promote instead a E1 or a sustitution product.
Therefore the alkyl bromide should be like the one in the picture 2.
PLZZZZZZZZ HELLLLLLLLLLLLLLLLLPPPPPP!!!!! soo stuckkkkk
In which state of matter does heat travel fastest and slowest?
Answer:
Heat travels faster in solids.
Heat travels slower in gases.
Explanation:
The state of matter in which heat travels in fastest way is solid and in gaseous state heat travels in slowest way.
What is heat transfer?Heat transfer is a process in which heat can travel from one body to another body or from high temperature to low temperature.
In solid state heat will travel in the fastest way because molecules are arranged very close to each other and heat will travel through conduction process. And in gaseous state heat will travel with slowest way as molecules are arranged in very distance.
Hence in solid, heat travels in fastest way and in gases heat travels in slowest way.
To know more about heat conduction, visit the below link:
https://brainly.com/question/1121702
When naming acids, the term “hydro” is used then there are or are not (pick the correct one) any oxygens.
Answer:
There are no oxygen
Explanation:
Hydro is used when naming hydrogen compound and oxo is used when naming oxygen compound
The picture compound has which bond?
Answer:
There are C - C bonds and C - H bonds.
trust me! I took a test with this question and got 100! :)
Explanation:
What is the molar mass of silver oxide (Ag2O)
Answer:
231.735 g/mol
Explanation:
example of potassium salt
Answer:
1) Sodium Chloride
2) Potassium Dichromate
3)Calcium Chloride
4)Sodium Bisulfate
Explanation:
Ex:1) Sodium chloride (NaCl) is the most common type of salt in our lives. Known as table salt, it forms a cubic lattice when it's in solid form. It's one of the safest materials you can use in a chemistry class or kitchen.
Ex:2) Potassium dichromate (K2Cr2O7) is an orange-colored salt composed of potassium, chromium and oxygen. Not only is it toxic to humans, it's also an oxidizer that is a fire hazard. Potassium dichromate should never be thrown away. Instead, it should be washed down the drain with a lot of water. Always use rubber gloves when working with this compound. If you spill a potassium dichromate solution on your skin, it gives you a chemical burn. Keep in mind that any compound with chromium in it is a potential carcinogen.
Ex:3)Calcium chloride (CaCl2) resembles table salt in its white color. It is widely used to remove ice from roads. It's more effective than sodium chloride as a deicer, because calcium chloride produces three ions, while calcium chloride produces only two. Calcium chloride can melt ice down to minus 25 F, as much as 10 degrees lower than for sodium chloride. Calcium chloride is so hygroscopic, which is the ability to absorb water, that if you leave it in a room uncovered, it can absorb enough water from the air to dissolve into a solution all on its own.
Ex:4) Sodium bisulfate (NaHSO4) forms from sodium, hydrogen, sulfur and oxygen. It is created from sulphuric acid and retains one of the acid's hydrogen ions, which gives this salt acidic qualities. Known as a dry acid, sodium bisulfate is used in commercial applications, such as reducing the pH level of spas and swimming pools, washing concrete and cleaning metals. In its solid form, sodium bisulfate forms white beads. This salt is poisonous and can damage your skin, so use rubber gloves when handling it. If ingested, call the poison control center immediately and do not induce vomiting.
Ill give the brainliest answer to whoever helps me with this equation
Answer: The percent yield for the [tex]NaBr[/tex] is, 86.7 %
Explanation : Given,
Moles of [tex]FeBr_3[/tex] = 2.36 mol
Moles of [tex]NaBr[/tex] = 6.14 mol
First we have to calculate the moles of [tex]NaBr[/tex]
The balanced chemical equation is:
[tex]2FeBr_3+3Na_2S\rightarrow Fe_2S_3+6NaBr[/tex]
From the reaction, we conclude that
As, 2 moles of [tex]FeBr_3[/tex] react to give 6 moles of [tex]NaBr[/tex]
So, 2.36 moles of [tex]FeBr_3[/tex] react to give [tex]\frac{6}{2}\times 2.36=7.08[/tex] mole of [tex]NaBr[/tex]
Now we have to calculate the percent yield for the [tex]NaBr[/tex].
[tex]\text{Percent yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100[/tex]
Experimental yield = 6.14 moles
Theoretical yield = 7.08 moles
Now put all the given values in this formula, we get:
[tex]\text{Percent yield}=\frac{6.14mol}{7.08mol}\times 100=86.7\%[/tex]
Therefore, the percent yield for the [tex]NaBr[/tex] is, 86.7 %
Write down as many as you can uses for liquid crystall
Answer:
The most important use of liquid crystals is in displays because the molecules of a liquid crystal can control the amount, color, and direction of vibration of the light that passes through them. hope that helps love!
Distillation is a _____________ separation technique.
chemical
physical
Answer:
Chemical
Explanation:
Because it's being done by chemical means
what is freshly prepared FeSO4 used in the brown ring test
Answer:
Freshly prepared ferrous sulphate is used in brown ring test, because if FeSO4 is stored or it is the old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown-yellow coating of basic ferric sulphate, which is an adduct of ferric oxide and ferric sulphate
HEYA FRIEND
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HERE'S YOUR ANSWER
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It is used in brown ring test because , if Fe2So4 is stored or it is old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown yellow coating of basic ferric sulphate , which is an adduct of ferric oxide and ferric sulphate.
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HOPE IT WILL HELP YOU UP
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KATË
If a gas at 35°C and 2.3 atm is heated to 50°C, then what will the new pressure be? (Gay Lussac's Law)
Remember to convert Celsius tempertature into Kelvin. (Take the Celsius values and add 273)
Answer:
THE NEW PRESSURE OF THE GAS AT 50 °C IS 2.41 atm.
Explanation:
Initial temperature = 35 °C = 35 + 273 K= 308 K
Final temperature = 50 °C =50 + 273 K = 323 K
Initial pressure = 2.3 atm
Final pressure = unknown
Using the combined gas equation to get the relationship between pressure and temperature for a given gas sample, we have;
P1 / T1 = P2 / T2
P2 = P1 T2 / T1
P2 = 2.3 * 323 / 308
P2 = 742.9 /308
P2 = 2.41 atm.
THE NEW PRESSURE IS 2.41 atm at 50 °C
This is how fluorine appears in the periodic table. A green box has F at the center and 9 above. Below it says fluorine and below that 19.00. A blue arrow points to 9. What information does "9” give about an atom of fluorine? Select three options. the atomic number the atomic mass the number of protons the number of electrons the number of neutrons
What is h2OO??????????
What is meant by “normal” when you are asked for normal boiling and melting points?
Answer:
Normal boiling point is the temperature at which a liquid boils at 1 atmosphere of pressure.
Explanation:
what is the best way to make a supersaturated solution?
A. cool the solution
B. Stir the solution
C. Heat the solution
D. Evaporate the solution
C.heat the solution
what is the atomic number of silver
Answer:
47
Explanation:
Silver (Ag), chemical element, a white lustrous metal valued for its decorative beauty and electrical conductivity. Silver is located in Group 11 (Ib) and Period 5 of the periodic table
The atomic number of silver is 47.
That also means that silver has 47 electrons and 47 protons.
The atomic mass of silver is 108u.
107 - 47 = 60
Silver has 60 neutrons.
