Answer:
8.70 liters
Explanation:
3O₂+ 4Al → 2AI₂O₃First we convert 36.12 g of AI₂O₃ into moles, using its molar mass:
36.12 g ÷ 101.96 g/mol = 0.354 mol AI₂O₃Then we convert AI₂O₃ moles into O₂ moles, using the stoichiometric coefficients of the reaction:
0.354 mol AI₂O₃ * [tex]\frac{3molO_2}{2molAl_2O_3}[/tex] = 0.531 mol O₂We can now use the PV=nRT equation to calculate the volume, V:
1.4 atm * V = 0.531 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 280.0 KV = 8.708 LDirections: Decode the words using the clue. The definition of each word is
also given to help you identify the words.
D
F
н
K
X
L
Y
N
P
R
$
V
N
1. ZBYRPHYRF - smallest particle in a chemical element or compound
Anger
Answer:
cause it has more
space between molecules.
O C. Ice has a higher density than li
Explanation:
What sort of fossils would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole?
Answer:
Antarctic Peninsula, is one of the most important fossil sites on Earth.
hope this helps you ☺️☺️
Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.
What are fossils?Fossils are the preserved remains, impression, or trace of any once-living thing from many years ago. Examples of the fossils include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants.
There are four different types of fossils-
Mold fossils
Cast fossils
Trace fossils or Ichnofossils
True form fossils
Imprints, tracks, and trails can also become fossilized and are called Trace fossils. Dinosaur footprints or worm burrows are the examples.
Living things when get decomposed from the so many years ago and become dirt and rocks are fossils.
Therefore, Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.
Learn more about Fossils, here:
https://brainly.com/question/14988327
#SPJ3
8.0 g of cream at 17.0 °C are added to an insulated cup containing 150.0 g of coffee at 73.2 °C. Calculate the equilibrium temperature of the coffee.
Answer:
70.35°C
Explanation:
From the question,
Assuming: The specific heat capacity of cream and coffee is thesame as that of water = 4.2 J/g.°C
Applying
Heat lost by the coffee = heat gained by the cream
cm(t₁-t₃) = cm'(t₃-t₂)................ Equation 1
Where c = specific heat capcity of both cream and coffee, m = mass of coffee, t₁ = intial temperature of coffee, m' = mass of cream, t₂ = initial temperature of cream, t₃ = equilibrium temperature
From the question,
Given: m = 150 g, t₁ = 73.2°C, m' = 8 g, t₂ = 17°C
Constant: c = 4,2 J/g.°C
Substitute these values into equation 1
4.2×150(73.2-t₃) = 4.2×8(t₃-17)
630(73.2-t₃) = 33.6(t₃-17)
Solve for t₃
46116-630t₃ = 33.6t₃-571.2
630t₃+33.6t₃ = 571.2+46116
663.6t₃ = 46687.2
t₃ = 46687.2/663.6
t₃ = 70.35°C
What is Chlorination?
Answer:
Chlorination is a process which involves adding of chlorine to water but the chlorinating product which does not necessarily have to be pure chlorine
a substance that is found naturally in the Earth and that does not contain plant or animal matter. Gold is an example.
Answer:
COPPER , SILVER, GRAPHITE, WATER , POTASSIUM , LEAD AND .........ETC
Explanation:
A student rode their bike for a 3 hour period. During that time, she covered 60 km. What was the average speed?
Question 3 of 20 :
Select the best answer for the question.
3. The atomic number of niobium (Nb) is 41. What's the electron configuration for Nb?
O A. [Ar] 3s 4p?
O B. [Kr] 5s? 5p
O C. [Kr] 4d45s
O D. (Ne) 4d
Answer:
[Kr] 4d4 5s1
Explanation:
Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Niobium is Nb. Neutron Number and Mass Number of Niobium Mass numbers of typical isotopes of Niobium are 93.
Name of Element : Niobium
Atomic Weight : 92.9
Atomic Number : 41
Group : Transition Elements
Electron Configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d3
A sample of neon gas at 25.0°C has a volume of 42.4 L and a pressure of 1.40 atm. How many moles of neon are there? NOTE: You must show your calculation on the attached scratch paper,
including which of the Gas Law formulas you used. *
A. 14.4 moles
B. 0.41 moles
C. 28.9 moles
D. 2.43 moles
(Show how you did it please)
________________________________
Using ideal gas law–
We'll use formula,
PV = nRT
Where,
P, Pressure = 1.40 atm
V, Volume = 42.4 L
n, Number of moles = ( To find ) ?
T, temperature = 25°C
= 25 + 273= 298 KelvinR, Ideal gas constant = 0.08206 L . atm/k. Mol
________________________________
Here, PV = nRT
Or, PV / RT = n
Or, [tex] \frac{1.40 \: atm \times42.4 \: litres }{298 \: k \: \times 0.08206 \: l.atm /k \: .mol} = n[/tex]
Or, n = 2.43 Moles.
Or, n = 2.43 Moles.
________________________________
I had to take help from my elder brother.
We tried our best, hope it helps you.
By– Debasis ( feat – Apollo)
________________________________
(02.02 LC) The two main types of weathering are Select one:
a. mechanical and physical
b. physical and kinetic
c. chemical and physical
d. chemical and acidic
Answer:
d
Explanation:
Answer:
c. chemical and physical
Explanation:
hope this helps! :)
Why do scientists track virus mutations and how might tracking these variants be helpful in preventing and treating the virus?
Answer: they do this because if they do they can easily find new viruses to stay safe from
Explanation: i took test on it recentley
Is vinegar acidic, alkaline or neutral?
Answer:
Substances over 7 are categorized as basic, with 7 being the neutral point. Water has a pH level of 7. Substances with pH levels under 7 are categorized as acidic. Vinegar is acidic.
Explanation:
You can change it a little if you want. Hope this helps!
Vinegar is acidic. The only vinegar that has alkaline is apple cider vinegar, but all types of vinegar are acidic.
The equation shows neutralization of an acid and a base to produce a salt and water
Answer:
tRUE??
Explanation:
2H2 + O2 = 2H2O is a neutralization or non-neutralization reaction? And explain why..
In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl42-. Co2 (aq) is pink and CoCl42-(aq) is blue. At Low Temperature the pink color pre-dominates. At High Temperature the blue color is strong. If we represent the equilibrium as:
CoCl4^2-(aq) <--> Co2+(aq) + 4Cl-(aq)
We can conclude that:___.
1. This reaction is:___.
A. Exothermic
B. Endothermic
C. Neutral
2. When the temperature is decreased the equilibrium constant, K:____.
A. Increases
B. Decreases
C. Remains the same.
3. When the temperature is decreased the equilibrium concentration of Co2:______.
A. Increases
B. Decreases
C. Remains the same.
Answer:
1. This reaction is (A) Exothermic .
2. When the temperature is decreased the equilibrium constant, K: (A) Increases
3.When the temperature is decreased the equilibrium concentration of Co2: (A) Increases
Explanation:
[tex]CoCl4^2-(aq) <--> Co_2+(aq) + 4Cl^-(aq)[/tex]
1. The pink color predominates at low temperatures, indicating that the commodity is preferred.
This is a reaction that is exothermic.
2. As the decrease in the temperature , the equilibrium constant , K ;
equilibrium constant = [tex]\frac{product}{reactant}[/tex] =[tex]\frac{[CO^2^+][Cl^-^4]}{CoCl^2^-_4}[/tex]
As the temperature drops, the concentration of[tex]Cl^-[/tex] and [tex]CO^2^+[/tex] rises, and K rises as well , thus it increases .
3. The equilibrium concentration of [tex]CO^2^+[/tex] decreases as the temperature decreases:
When the temperature is lowered, the equilibrium shifts to the right , that is it increases.
3. Which of the following affects the angle at which the sun's rays hit Earth?
a. weather
b. latitude
c. sea level
d. wind
Answer:weather
Explanation:
A ______ is a hole where the steam looks a lot like a smoke
A DRY ICE is hole were the steam looks a lot a smoke
What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of.
Answer:
I think u understand this answers
Which is compound formed from a metal cation and nonmetal anion?
Carbon dioxide
Carbon monoxide
Potassium chloride
Diphosphours pentoxide
Someone please help!
Answer:
Warm Springs temperature
Explanation:
Why is ammonia (NH₃) classified as a polar molecule?
(4 Points)
Ammonia molecules dissolve in mineral oil.
N-H bonds are non-polar.
Nitrogen and hydrogen are both non-metals.
Ammonia contains an asymmetrical distribution of electric charge.
Answer:
Ammonia contains an asymmetrical distribution of electric charge.
Explanation:
Hello there!
In this case, accordingly to the electronegativity difference we can calculate for the N-H bond, and based off our periodic table, which shows an electronegativity of 3.0 and 2.1 for N and H respectively, we obtain:
[tex]DE=3.0-2.1=0.9[/tex]
Which is within the range of polar molecule even the both of them are nonmetals. Thus, choices a and b are firstly discarded; nonetheless, even when they are both nonmetals, two of these elements usually have a nonpolar bond, which means that option C is discarded, and therefore, our answer is ammonia contains an asymmetrical distribution of electric charge.
Regards!
In order to determine the oil content of different types of potato crisps (chips), a student weighed 5.00g of crushed crisps and mixed them with 20.0cm3 of non-polar solvent.
She assumed all the oil in the crisps dissolved in the solvent.
The student then filtered the mixture to remove any solids, and gently heated the solution on a hot plate to evaporate the solvent.
She measured the mass of the oil that remained from each type of crisps
Suggest why a non-polar solvent was needed.
Answer:
In order to determine the oil content of different types of potato crisps (chips), a student weighed 5.00 g of crushed crisps and mixed them with 20.0 cm3 of non-polar solvent. She assumed all the oil in the crisps dissolved in the solvent. The student then filtered the mixture to remove any solids, and gently heated the solution ...
Explanation:
Student needed a non polar solvent to determine the content of oil due to non polar nature of oil.
What are non polar solvents?Those solvents in which within the molecule positive and negative ends are not present will describe as a non polar solvents.
Molecules will dissolve in same kind of solvent by the concept of like dissolves like, means polar molecules dissolve in polar solvents and non polar molecules will dissolve in non polar molecules. Oil is a non polar molecule thats why in the experiment to determin the oil content or to dissolve oil of crisps in the solvent he had used non polar solvent.
Hence due to non polar nature of oil, student used non polar solvent.
To know more about non polar solvents, visit the below link:
https://brainly.com/question/15096248
Steven placed an ice cream scoop under hot water before scooping ice cream. Which describes how the ice cream scoop was affected
Answer: Okay so i don't know how i can explain this but.. OK so Steven placed an ice cream scoop right? and put it under hot water so i would say it would make the ice cream scoop hot? and then using it to scoop the ice cream i could say it would be a melting affection i think
Explanation:
im am so sorry pls forgive me is i am wrong i tried my best so at least give me a like for effort.. i hope u have a great day :)
An electrochemical cell is made up of an Zn2+/Zn half-cell and an Ag+/Ag half-cell. If the mass deposited at the silver electrode is 0.50 g, calculate the mass lost at the zinc electrode.
Answer:
hi how are you doing today Jasmine
What are the reactants and products of a redox reaction, neutralization reactions, and precipitation reactions?
Answer:
Precipitation reactions are ones in which at least one of the reactants is in the aqueous phase (i.e., dissolved in water), and a solid forms on the product side which was not present on the reactant side. If all the reactants are solid, then a solid product forming should not be called a precipitate. To be called a precipitate, an insoluble product must form from within solution, either from a solid and solute interacting, or from an interaction strictly between solutes.
Explanation:
why silicon exist as solid at room temperature while chlorine exist as gas ?
Answer:
Hello Dear!..Explanation:
CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen. ... because of this reason co2 is gas but sio2 is solid.
Hope that helps you Buddy ...
Take care...
Buhbye!
For a lake in Michigan, researchers have determined that largemouth bass feed on smaller fish, which in turn feed on zooplankton. In 2016, there was 600,000 kg of zooplankton in the lake. In 2017, an accidental runoff of insecticide near the lake caused a 50 percent decline of the zooplankton population in the lake. Assuming 10 percent trophic efficiencies, what is the expected decline in largemouth bass?
(a) 1,000 mg.
(b) 1,500 kg.
(c) 2,000 kg.
(d) 3,000 kg.
Answer:
the expected decline in largemouth bass is 3,000 kg.
Option d) 3,000 kg is the correct answer.
Explanation:
Given the data in the question;
In 2016, there was 600,000 kg of zooplankton in the lake.
In 2017, an accidental runoff of insecticide near the lake caused a 50 percent decline of the zooplankton population in the lake.
Now,
The remaining mass of zooplankton after the 50% decline will be;
⇒ 600,000 kg zooplankton × 50%
⇒ 600,000 × 50/100
⇒ 300,000 kg of zooplankton
Now, with 10 percent trophic efficiency; smaller fish directly feed on zooplankton; decline in smaller fish mass will be;
⇒ 300,000 kg × 10%
⇒ 300,000 × 10/100
⇒ 30000 kg
Finally, with 10 percent trophic efficiency, largemouth bash directly feed on smaller fish, so the expected decline in mass of largemouth bash will be;
⇒ 30000 kg × 10%
⇒ 30000 kg × 10/100
⇒ 3,000 kg
Therefore, the expected decline in largemouth bass is 3,000 kg.
Option d) 3,000 kg is the correct answer.
In the 1990s scientists were studying the comet named Shoemaker-Levy. Write a short report about this comet.
Answer:
Please find the report on the comet below
Explanation:
Specifically in the year 1993, a comet was discovered by three individuals namely: Eugene Shoemaker, Carolyn Shoemaker, and David Levy. The comet was named after the first discoverers as; Shoemaker-Levy 9.
Shoemaker-Levy 9 was reported to have already been in pieces as at the time of discovery. It was believed to have been torn apart by the gravitational force emanating from the biggest of the planets called JUPITER.
In July 1994, Shoemaker-Levy 9 came in contact with Jupiter in what seemed to be the end of the discovered comet. This collision of Shoemaker-Levy 9 with planet Jupiter was said to be the first ever solar systems collision observed.
When the common ion effect is in action, the equilibrium of a system will shift to: Select the correct answer below:
a. decrease the amount of the common ion in the system
b. increase the amount of the common ion in the system
c. depends on the ion
d. The system will not shift at all.
Answer:
a. decrease the amount of the common ion in the system
Explanation:
The correct option is - a. decrease the amount of the common ion in the system
Reason -
Adding a common ion decreases solubility, as the reaction shifts toward the left to relieve the stress of the excess product.
Adding a common ion to a dissociation reaction causes the equilibrium to shift left, toward the reactants, causing precipitation.
Which of the following samples of gas would have a new volume of 3.00 liters if the pressure is decreased from 3.00 atm to 1.00 atm at constant temperature?
The group of choices associated with the questions is as follows:
A) 1.00 L He
B) 5.00 L CO2
C) 9.00 L H2S
D) more than one correct response
E) no correct response
Answer:
The correct answer is - A) 1.00 L He
Explanation:
According to the Boyles law, the pressure of the gas is inversely proportional to the volume of the gas at a constant temperature which means if the pressure increases then the volume will decrease and vice versa.
The equation of Boyle's law :
P1V1=P2V2
and V1 = P2V2/P1
Placing the value
V1 = 3*1/3
V1 = 1 L
thus, there is only one option has one liter that is A) 1.00 L He
A sealed weather balloon contains 25 L of helium (He) gas at 25.0 deg C.
What is the volume, in liters, of He is in the weather balloon at 35.0 deg C?