Answer:
Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell
True or False: Passive transport occurs when molecules move from an area of low concentration to high concentration.
A sample of gas occupies 20 mL at -109 degree C. What volume does the sample
occupy at 65 °C?
Answer: V2= 41.2mL
Explanation:
Givens:
* V1= 20ml
* T1 = -109 ⁰C --> K= ⁰C + 273.15 --> 164.15 K
* V2 = ??
* T2= 338.15 K
Use Charles law V1/T1 = V2/T2
Since we are looking for V2 we can rearrange the formula to
V2= (T2 x V1) /T1
V2= (338.15K x 20mL) / 164.15 K
V2= 41.2mL
NOTE:
Temperature should always be in K not in ⁰C or ⁰F
To convert from C to K use
*K= ⁰C + 273.15
Enter your C value in the ( ⁰C ) and you can get K
What is the minimum uncertainty in a simultaneous measurement of the y-component of the proton's velocity?.
Answer: c
Explanation:
What is the volume, in liters, of 1.4 moles of CO2 gas at STP?
Answer:
22.4 L.
Explanation:
What is an example of thermal energy
A) batteries moving a toy
B) riding a bicycle
C) plugging in a tv
D) using an oven to cook
Write a balanced equation and name the products of the reaction CaCl2+Na3(PO4)
balanced equation - 3CaCl2 + 2Na3PO4 → Ca3(PO4)2 + 6NaCl
products - calcium phosphate and sodium chloride
Answer:
Ca3(PO4)2 + NaCl
Explanation:
calcium phosphate and sodium chloride
which tool would be best for measuring centimeters
A. Metric ruler
B. Balance scale
C. Meter scale
D. Measuring tape
Answer:
the answer is d
Explanation:
give me a answer!!!!!!!!!!!!!!!
Answer: i did the ones i knew
1. thorns
2. smell
6. long roots
8. smell
9. thorns
Explanation:
What mass of aluminum must react with 100 g of copper (ii) phosphate? (10g)
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically,
mole =given mass ÷ molar mass
2 Al + 3 Cu[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] → Al[tex]_2[/tex] (PO[tex]_4[/tex])[tex]_3[/tex]+ 3 Cu
moles of copper phosphate= 100 g/380.58
=0.26 moles
3 moles of copper sulphate need 2 mole of Al
0.26 moles of copper sulphate need (2/3)×0.26
=0.17moles
mass of Al= 0.17×26
=4.42g
Therefore, 4.42g of aluminum must react with 100 g of copper (ii) phosphate.
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How many molecules are in 10 grams of sulfur hexafluoride (SF6)? Molar Mass: 146.06 g/mol
Answer: 4.123 x 10^22
Explanation:
The first step is to determine how many moles of sulfur hexafluoride (SF6) there are. To do this, you must take the mass of the SF6 (10g) and divide it by the molar mass (146.06).
[tex]10g * \frac{1 mol}{146.06 g}= 0.068465 mol[/tex]
Then you must use Avagadros number to find the number of molecules.
Avagadros number is the number of molecules in 1 mol of a substance, so a simple multiplication will do the trick.
[tex]0.068465mol * \frac{6.022 * 10^{23}}{1mol} = 4.123*10^{22}[/tex]
And that is your answer. There are 4.123 x 10^22 molecules of sulfur hexafluoride in 10g of it.
Why do different places on Earth have different climates?
Your answer should include 1 paragraph to explain the claim, evidence, and reasoning. Be sure to check your grammar and spelling!
First, the amount of sunlight received at a given latitude is important. At the equator, the sun is high in the sky and thus very intense. As you move away from the equator, the sun does not reach as high of an angle in the sky, and is less intense. Another important effect near the poles is that during the summer, the sun is up all the time, which boosts the total amount of sunlight received in a day, while in contrast, during the winter, no sunlight is received at all.
There is another, more subtle effect that has to do with latitude. Nature likes to have the temperature be the same everywhere, much like ice cream melts at room temperature or a hot cup of coffee cools to room temperature. The equator is getting blasted with intense sunlight, while the poles are getting a lot less. Nature tries to resolve this imbalance and make the atmosphere the same temperature everywhere. The most efficient way to transfer heat towards the poles depends on latitude and the rotation of the Earth in a complex way. In the tropics (within 30 degrees latitude of the equator), the average daily temperature is mostly constant. Whether you move from north to south, say fro the equator to Mexico, the temperature is mostly the same. Compare that to the midlatitudes (30–60 degrees latitude), where the temperature changes rapidly as you move north or south to the poles. For example, the temperature in Texas is a lot hotter than the temperature in North Dakota.
Another factor is the composition of the surface. Different substances absorb, store, and re-emit heat with different levels of efficiency. The ocean is a major factor, which can either warm or cool the adjacent land. Other surface materials like rock, sand, vegetation, and ice also regulate temperature
The elevations of the surface, specifically mountains effect the climate. Usually, the taller the mountain, the colder the temperature is at the top. Mountains also cause air to flow in certain ways around them, which leads to wet areas on the upwind side and dry areas on the downwind side.
State charles's law. If a balloon occupies 885 cm3 volume at 20°C and 794 cm3 at - 10°C , prove that this is according to charles's law.
find the distance between
the following points:
a) AC0₂0) and B(5, 2)
When 0.019 mol of aluminum sulfate are dissolved in enough water to make 905 milliliters of solution, what is the molar concentration of aluminum ions? Answer in units of M
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Liquid water can be separated into hydrogen gas and oxygen gas through electrolysis. 1 mole of hydrogen gas and 0.5 moles of oxygen gas is produced from 1 mole of liquid water collected in separate 10 L containers at 1 atm. Will the temperatures of the gases be equal? In one to two sentences, use the ideal gas law to explain your answer. (20 points)
Answer:
The ideal gas law specifies the mechanical behavior of ideal gases. It is capable of calculating the volume of gases produced or consumed.
In chemical equations, these equations are widely used to convert between volumes and molar quantities.
Use ideal gas law
Therefore
is the same for both So, = same for both.
When n increases, T decreases, so, n is 1 for and 0.5 for , implying that is hotter.
The temperatures of the gases will not be equal.
The ideal gas law specifies the mechanical behavior of ideal gases. It is capable of calculating the volume of gases produced or consumed. In chemical equations, this equation is widely used to convert between volumes and molar quantities. The ideal gas law states that the pressure, temperature, and volume of gas are related to each other[tex]PV=nRT[/tex]
∵V is the same for both
∴T= same for both.
When n increases, T decreases, so, n is 1 for hydrogen gas and 0.5 for oxygen gas ,implying that oxygen gas will have more temperature than hydrogen gas since its number of moles are lower than hydrogen gas.
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What are some advantages to the use of hydrokinetic energy? What might be some disadvantages?.
Hydro-kinetic energy has advantages of being a clean, domestic, and renewable source with effective production. The disadvantages have been affected marine environment, along with water quality, and electricity on drought.
Hydro kinetic energy has been the energy produced by the movement of water bodies in the form of tides, waves, and oceanic current. The hydro-kinetic energy has been composed with high energy entrapped in the water bodies.
Some of the advantages of hydro-kinetic energy has been:
It has been a clean energy source and has been pollution free.It has been used as domestic source of energy.It has been a renewable source of energy.It has been produced by the tidal waves, thus can be produced effective and in need.Some of the disadvantages of hydro-kinetic energy has been:
Application of water bodies affects the marine environment.It has been producing low BOD and thereby affects the water quality.Conditions such as drought result in the affected electricity production.For more information about hydro-kinetic energy, refer to the link:
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Answer:
Some advantages to using hydrokinetic energy are that it can be used without mining materials, it is not associated with waste production, and that it does not contribute to air pollution. The main disadvantage to using hydrokinetic energy is the fact that it uses waves and tides as an energy source. This technology could not be used in all locations.
Explanation:
got it on edge sorry for the late response
Use the pictures below to answer these questions: How does Magnesium become an ion? What is the charge of the Magnesium ion?
Answer:
Explanation:
The bottom picture shows a Mg atom. There are two electrons on the outside ring. When Mg reacts with something, these 2 electrons are given away. The top picture records that fact.
Where is the Oort cloud located
A) between the orbit of mars and orbit of Jupiter
B) in the different orbits between the sun and Neptune
C) behind the Kuiper belt at the farthest end of the solar system
D) all over the solar system in between the orbits of the planets
Answer:
If the Oort cloud exists which it most likely does it would be C
Explanation:
is seafloor spreading is beneficial or harmful for the earth
Answer:
Yes
Explanation
I learned it in science class
Students set up a controlled experiment. They put five
crickets in each of three identical containers. They set one
container to 15°C, one to 20°C, and one to 25°C. Then they
count the number of cricket chirps in each container
during 1 hour
What are two constants in this experiment?
Answer:
Here to let the other person have brainliest!!! Enjoy randomer
Explanation:
Please help I’ll give brainiest
Based on seismometer data what kind of information can seismologists calculate?
location, quantity, and time of damage created by earthquake
track movements of magma in the Earth's mantle and find out when volcanos will erupt
the distance of the earthquake's epicenter, the location of the epicenter, and when tsunamis will strike coastal areas
time of earthquake, magnitude and velocity, and type of seismic waves
Answer:
Time of earthquake, magnitude and velocity, and type of seismic waves
Explanation:
Seismometers allow us to detect and measure earthquakes by converting vibrations due to seismic waves into electrical signals, which we can then display as seismograms on a computer screen. Seismologists study earthquakes and can use this data to determine where and how big a particular earthquake is.
which of the following pairs of molecules can form hydrogen bonds between them? group of answer choices ch3oh and nh3 hcl and hi ch4 and h2o fo2 and ch2o h2 and o2
Answer:
Hydrogen Bond is the force that exists when H is directly connected to F, O, or N. HCl and HI cannot form hydrogen bonds between them. CH3OH and NH3 can form hydrogen bonds between them. CH4 and H2O cannot form hydrogen bonds between them.
Explanation:
For an electric toothbrush, is input energy equal to useful output energy? Explain
your answer.
No, input energy is not equal to useful output energy, if it is an electric toothbrush.
What is the useful type of energy produced in an electric toothbrush?Electrical Energy is the useful type of energy produced in an electric toothbrush.
If input energy is equal to useful output energy. This means that the total amount of energy that is in an isolated system (such as an engine or a generator) remains constant (conserved) over time.
However, the total amount of useful energy output of an isolated system is never equal to the total energy input.
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Why are unbalanced equations NOT useful in
chemistry?
Answer:
If the numbers of each type of atom are different on the two sides of a chemical equationExplanation:
Two samples of carbon come into contact. A heat transfer will occur between sample A and sample B. What must be true for heat to transfer from sample A to sample B
giving brainly if correct!
complete the chart above
Answer:
I hate chemistry good luck alice
What is the formula for this compound?
2 atoms of aluminum, 3 atoms of sulfur
Answer:
A
Explanation:
2 atoms of aluminum, 3 atoms of sulfur
Aluminum = Al
Sulfer = S
i just took the test
The formula for 2 atoms of Al and 3 atoms of S is Al₂S₃ and is named Aluminium Sulphide.
How are the formulas of the compound formed?Al has atomic no. =13, S has atomic no.=16
So the valencies of the given elements are
Al⁺³ and S⁻² to attain the noble gas configuration.
Al⁺³↘ ↙S⁻³
Al₂S₃
Cross multiply the valancies for the formation of molecular formula.
Hence, the formula is Al₂S₃.
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in 1-2 sentences explain how the shorelines can affect weather.
Answer: Global warming causes sea-level rise as oceans expand, and makes storm patterns more energetic. Consequently it will affect most of the world's coastlines through inundation and increased erosion.
Explanation:
give free 18 points again just answer yes or no
is einstein a scientist? yes or no
Answer:
yes
Explanation:
Answer:
Yes
Explanation:
Albert Einstein is often cited as one of the most influential scientists of the 20th century. His work continues to help astronomers study everything from gravitational waves to Mercury's orbit
1) How many moles of hydrogen gas can be produced if 0.57 moles of hydrochloric
acid, HCl, reacts with excess solid zinc according to the following chemical
equation?
2 HCl + Zn → Hz + ZnCl2
Answer: 0.28 mol H2
Explanation:
0.57mol HCl 1mol H2
2mol Hcl
Hydrochloric acid and zinc show the displacement reaction to produce hydrogen gas and zinc chloride. 0.57 moles of hydrochloric acid and excess zinc react to produce 0.28 mol H₂.
What is a displacement reaction?A displacement reaction is the removal of one of the elements from the reactant with highly active species of the reactivity species to produce the products. It can be a single or double displacement reaction.
The balanced chemical displacement reaction is given as:
2 HCl + Zn → H₂ + ZnCl₂
Here, two hydrochloric acids react with zinc to form one mole of hydrogen gas and one mole of zinc chloride.
Given,
Hydrochloric acid = 0.57 moles
Using proportions to calculate moles as:
If 2 moles of HCl = 1 mole H₂
Then, 0.57 moles = X moles
X = 0.57 ÷ 2
= 0.28 mol H₂
Therefore, 0.57 mole HCl produces 0.28 moles of hydrogen gas.
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how many moles of water in 100 grams
Answer:
There are approximately 5.55 moles
Explanation:
