Answer:Crude oil is a mixture of many saturated hydrocarbons. They can be separated into fractions by the process of fractional distillation.
Explanation:
H2(g) + I2(g) ↔2HI(g) + heat. If more I2 is added, in what direction will the equilibrium shift? Group of answer choices
Answer:
Towards the products, or to the right
Explanation:
There are no provided answer choices, but the answer should be to the right.
By Le Chatelier's principle, which basically can be summarized as "if you mess with chemistry, chemistry messes back", if more reactants are added, the equilibrium will shift to the right towards the products in order to make more products and counteract the increase in I₂.
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.
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
A.
B.
C.
D.
what could be the correct answer? Help me please
Answer:
A
Explanation:
Answer:
a
Explanation:
What is the mass of a bone that has a volume of 80.0 cm3 and a density of 1.9 g/cm3 ?
Show the work in conversion factors format please!
Answer:
152
Explanation:
since it weighs 1.9 grams per [tex]cm^{3}[/tex] we get 80*1.9 which is 152 grams
discharge by the combination of Nitrogen and oxygen
Answer:
NO2
Explanation:
N = Nitrogen
O = Oxygen
Answer:
NO. 2.
is the answer
hopes this helps
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
Distillation is a _____________ separation technique.
chemical
physical
Answer:
Chemical
Explanation:
Because it's being done by chemical means
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:
Se hacen reaccionar 100 g del agente oxidante con 25 g del agente reductor, según la reacción REDOX LaTeX: N_2\left(g\right)+H_2\left(g\right)\longrightarrow NH_3\left(g\right)N 2 ( g ) + H 2 ( g ) ⟶ N H 3 ( g ) Indique el reactivo en exceso y los gramos de amoniaco formado, si la eficiencia del proceso es del 80 %
Answer:
El reactivo en exceso es hidrógeno
97.12g NH₃ son formados
Explanation:
Basados en la reacción:
N₂(g) + 3 H₂(g) → 2 NH₃(g)
El hidrógeno pasa de estado de oxidación 0 a estado de oxidación +1. Al perder un electrón se oxida y es el agente reductor.
El nitrógeno pasa de estado 0 estado -3. Al ganar 3 electrones se reduce y es el agente oxidante.
100g de N₂ son (Peso molecular: 28g/mol):
100g × (1mol / 28g) = 3.57 moles de N₂
Y 25g de H₂ son (Peso molecular: 2g/mol):
25g × (1mol / 2g) = 12.5 moles de H₂
Como 3 moles de hidrógeno reaccionan por mol de nitrógeno, las moles de nitrógeno que se necesitan para hacer reaccionar completamente 12.5 moles de hidrógeno son:
12.5 moles H₂× (1 mol N₂ / 3 moles H₂) = 4.17 moles de nitrógeno.
Como hay 3.57 moles de nitrógeno, el reactivo en exceso es hidrógeno.
Como el reactivo limitante es el nitrógeno y 1 mol de nitrógeno produce 2 moles de amoniaco, las moles de amoniaco son:
3.57 moles de N₂ × (2 moles NH₃ / 1 mol N₂) = 7.14 moles de NH₃
La masa producida idealmente es:
7.14 mol NH₃ ₓ (17g/mol) = 121.4 g de NH₃. Como la eficiencia del proceso es del 80%:
121.4 g NH₃ × 80% = 97.12g NH₃ son formados
Answer:
Excess reactant: H₂
Mass of produced ammonia, 97.1 g
Explanation:
Identify the reaction:
N₂ + 3H₂ → 2NH₃
We identify the reducing agent and the oxidizing agent:
N₂ changed the oxidation state from 0 to -3. This is the reduction, so it is the oxidizing agent. By the way the H₂ is the reducing agent.
We convert the mass to moles:
100 g / 28 g/mol = 3.57 moles of N₂
25 g / 2 g/mol = 12.5 moles of H₂
Ratio is 1:3. For 1 mol of nitrogen, we need 3 moles of hydrogen
Then, 3.57 moles of N₂ would need (3.57 . 3) / 1 = 10.7 moles
We have 12.5 moles of H₂, so the hydrogen is the excess reactant and the nitrogen is the limiting.
To produce ammonia, the reaction needs 1 mol of N₂, that can produce 2 moles of product
3.57 moles of N₂ will produce (3.57 . 2) / 1 = 7.14 moles of NH₃
As yield reaction is 80%, we will produce 7.14 mol . 0.80 = 5.71 moles
We convert the moles to mass: 5.71 mol . 17 g / 1mol = 97.1 g
What is the molar mass of silver oxide (Ag2O)
Answer:
231.735 g/mol
Explanation:
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.
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:
calculate the ph of a solution containing 0.001 mol dm-3 Naoh
Answer:
pOH = - log [molarity of OH-] = - log [ molarity of NaOH] , assuming full dissociation. Thus, pOH = - log ( 0.001) = - (-3) = 3. Thus, the pH of 0.001 mol/dm3 NaOH solution is 11.
Explanation:
Hope it'll help!
For which purpose do biochemist insert human genes into bacteria
Answer: to find a cure for the common cold to produce insulin for diabetics
Explanation: It has helped many people
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.
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.
. Act 20 g Ca (M = 40g / mol) with H2SO4 diluted within 10 seconds. What will be the rate of hydrogen formation in mol / sec. please
Answer:
Rate of hydrogen formation is 0.05 mole per second
Explanation:
Firstly, we write the equation of reaction.
When alkali earth metals react with dilute mineral acid, the reaction is vigorous with the production or evolution of hydrogen gas as a result of the displacement of the hydrogen from the acid by the metal. This is one of the basic reactions of mineral acids
Ca + H2SO4 ——> CaSO4 + H2
Looking at the reaction, 1 mole of calcium gave 1 mole of the hydrogen gas
What we do now is to calculate the number of moles of calcium produced by 20g of Ca
Mathematically;
number of moles = mass/atomic mass
number of moles of calcium is thus
20/40 = 0.5 moles
Now, if 1 mole of calcium produced 1 mole of the gas
Definitely, 0.5 mole of calcium will produce 0.5 mole of the gas
So the rate of gas formation would be 0.5/10 = 0.05 mole/second
before the digestive system X-rayed people are required to swallow suspensions of barium sulphate (BaSO4). calculate the mass of one mole of BaSO4
Answer:
Molar mass of BaSO4 = 137.3 + 32 + (16 ×4)
= 137.3 + 32 +64
= 233.3g/mol
Molar mass = mass/ number of moles
= 233.3 g/mol = mass/ 1 mol
mass = 233.3g
Hope this helps.
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!
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.
why is copper different than copper ore gives me reasons. Do this asap
Answer:
copper cathodes are normally referred to when talking about copper. Cathode is the purest form of copper and is the feedstock used to produce copper wire, cable, sheet, strip, tube, etc.
Explanation:
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 %
Which of the following statements describes electromagnetism?
Answer:
c)Magnetism can cause electrons to flow, and electricity can make a wire magnetic.
Explanation:
If this is your question:
Which of the following statements describes electromagnetism?
a)Magnetism and electricity are both used by society to do work.
b)Magnetism and electricity both include protons and electrons.
c)Magnetism can cause electrons to flow, and electricity can make a wire magnetic.
d)Electrons are attracted to the protons in magnets.
Answer:
magnetism can cause electrons to flow, and electricity can make a wire magnetic
Explanation:
a p e x :)
Convert to standard notation.
8.127 x
10-4
Answer:
0.0008127
Explanation:
This is easy
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
Visit the interactive periodic table and locate the element neon (Ne). Use the information within the square to answer these questions.
Answer:
What is the atomic number of neon?
10
What is the atomic mass of neon? Give your answer to the nearest tenth.
20.2
The periodic table is a representation of the periodic elements based on atomic numbers. The atomic number of neon is 10, and the atomic mass is 20.2 amu.
What are the properties of neon?Neon is categorized as a stable gas that belongs to the noble gas group. It has been represented as Ne and is a monoatomic gas with no odor or color. It has an atomic number of 10 and an electronic configuration as, [He] 2s²2p⁶.
The atomic mass of neon elements is 20.2 amu and is said to have full electrons per shell. They do not need to donate or accept any electron as they have a balanced orbital. They have the property of fluorescence and are used in electric signs and lamps.
Therefore, neon is placed in group 18 and has atomic number 10 and a mass of 20.2 amu.
Learn more about neon, here:
https://brainly.com/question/8226528
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I NEED HELP PLEASE, THANKS! :)
The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 × 10^23 atoms or molecules, how many molecules are in a 23.45 g sample of copper (II) hydroxide, Cu(OH)2? Express your answer to the correct number of significant figures. (MM of Cu(OH)2 is 97.562 g/mol)
Answer:
[tex]\large \boxed{1.447 \times 10^{23}\text{ molecules Cu(OH)}_{2 }}[/tex]
Explanation:
1. Calculate the moles of copper(II) hydroxide
[tex]\text{Moles of Cu(OH)}_{2} = \text{23.45 g Cu(OH)}_{2} \times \dfrac{\text{1 mol Cu(OH)}_{2}}{\text{97.562 g Cu(OH)}_{2}} = \\\\\text{0.240 36 mol Cu(OH)}_{2}[/tex]
2. Calculate the molecules of copper(II) hydroxide
[tex]\text{No. of molecules} = \text{0.240 36 mol Cu(OH)}_{2} \times \dfrac{6.022 \times 10^{23}\text{ molecules Cu(OH)}_{2}}{\text{1 mol Cu(OH)}_{2}}\\\\= 1.447 \times 10^{23}\text{ molecules Cu(OH)}_{2}\\\text{The sample contains $\large \boxed{\mathbf{1.447 \times 10^{23}}\textbf{ molecules Cu(OH)}_{\mathbf{2}}}$}[/tex]
Answer:
Mass of Cu(OH)2 = 23.45 g
Molar mass of Cu(OH)2 = 97.562 g/mol
Since we know,
Moles = Mass/Molar mass
\Rightarrow Moles = (23.45 g)/(97.562 g/mol) = 0.2404 moles
Since 1 mole of substance contains = 6.022 × 1023 molecules
So 0.2404 moles will contain = 0.2404*(6.022 × 1023 molecules) = 1.448 × 1023 molecules
Explanation:
In 1982, the United States government changed the way it minted pennies. Before 1982, pennies were made of 95% copper and 5% tin. Now they are made of 97.5% zinc coated with copper. Because they weigh different amounts (have different masses) and are still the same item, they make a good model for studying isotopes.
4. What do the two kinds of pennies represent in this exercise?
5. How do the pennies differ? How do isotopes differ?
6. What do the pennies have in common? What do isotopes have in common?
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
