The concentration of the new solution of the ammonium sulphate, (NH₄)₂SO₄ given the data is 0.4 M
How to determine the mole of (NH₄)₂SO₄Mass of (NH₄)₂SO₄ = 66.05 gMolar mass of (NH₄)₂SO₄ = 132.1 g/mol Mole of (NH₄)₂SO₄ =?Mole = mass / molar mass
Mole of (NH₄)₂SO₄ = 66.05 / 132.1
Mole of (NH₄)₂SO₄ = 0.5 mole
How to determine the molarity of (NH₄)₂SO₄Mole of (NH₄)₂SO₄ = 0.5 mole Volume = 250 mL = 250 / 1000 = 0.25 L Molarity of (NH₄)₂SO₄ =?Molarity = mole / Volume
Molarity of (NH₄)₂SO₄ = 0.5 / 0.25
Molarity of (NH₄)₂SO₄ = 2 M
How to determine the molarity of the diluted solution Volume of stock solution (V₁) = 10 mL Molarity of stock solution (M₁) = 2 MVolume of diluted solution (V₂) = 50 mLMolarity of diluted solution (M₂) =?M₁V₁ = M₂V₂
2 × 10 = M₂ × 50
20 = V₂ × 50
Divide both side by 50
M₂ = 20 / 50
M₂ = 0.4 M
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Answer:
A: 0.400 M
Explanation:
If spin is not included, how many different wave functions correspond to the first excited level n = 2 for hydrogen?
If spin is not included, there are 4 different waves functions correspond to the first excited level n = 2 for hydrogen.
What are wave function?In quantum mechanics, a wave function is a variable quantity that mathematically describes a particle's wave characteristics.
The probability of a particle being present at a given point in space and time is related to the value of the particle's wave function.
Thus, there are 4 different waves functions correspond to the first excited level n = 2 for hydrogen.
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Which element could be included in a hydrocarbon?
Ca
Zn
Cl
Sn
Answer:
Cl
Explanation:
Hydrocarbons are Carbon chains that contain at least one halogen (F, Cl, Br, I and At)
Cl is a halogen
(I got this right on the test too)
Explain how energy causes changes to earths surface
Answer:
Explanation:
The absorbed sunlight drives photosynthesis, fuels evaporation, melts snow and ice, and warms the Earth system. Solar power drives Earth's climate. Energy from the Sun heats the surface, warms the atmosphere, and powers the ocean currents.
?? Answeeeeeeer
Answerrrrrrrrr
Answer:
.00000005 C or 50 x 10^-9 C
Explanation:
Like charges REPEL
k = 8.99 x 10^9 kg m^3 / s^2 C^2 ( they should have given units of this)
F = k q1q2/r^2 q1 = q2 so
F = k q^2 / r^2
9 x 10^-3 = 8.99 x 10^9 * q^2 /.05^2 (.05 m = 5cm)
q = .00000005 C
Convert 1060 mm Hg to atm. (answer should include 3 sig. fig and NO LABEL)
Answer:
1.39
Explanation:
1060 mm / 760 mm/atm = 1.39 atm
If 35 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, what would be the molarity of the solution?
Answer: 0.19 M
Explanation:
The gram formula mass of HCl is 36.46 g/mol, so 35 grams of HCl is about 35/36.46 = 0.96 moles.
molarity = (moles of solute)/(liters of solution) = 0.96 / 5.0 = 0.19 M
Molarity (M) = 0.961 moles / 5.0 liters ≈ 0.1922 mol/L
The molarity of the solution is approximately 0.1922 mol/L or 0.1922 M.
To calculate the molarity (M) of the solution, we need to use the formula:
Molarity (M) = Number of moles of solute / Volume of solution (in liters)
Given that 35 grams of HCl are dissolved in 5.0 liters of water, we first need to find the number of moles of HCl using its molar mass.
The molar mass of HCl (hydrochloric acid) is the sum of the atomic masses of hydrogen (H) and chlorine (Cl):
Molar mass of HCl = 1.01 g/mol (H) + 35.45 g/mol (Cl) = 36.46 g/mol
Now, we can calculate the number of moles of HCl:
Number of moles = Mass of HCl / Molar mass of HCl
Number of moles = 35 g / 36.46 g/mol ≈ 0.961 moles
Finally, we can calculate the molarity of the solution:
Molarity (M) = 0.961 moles / 5.0 liters ≈ 0.1922 mol/L
The molarity of the solution is approximately 0.1922 mol/L or 0.1922 M.
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72.
How many atoms are present in one mole of
water?
A)54
B)3
C)3(6.02 × 1023)
D)6.02 x 1023
Answer:
3 atoms
Explanation:
A water molecule consists of three atoms an oxygen atom and two hydrogen atoms which are bond together like little magnets
5. Which describes why the sun is a renewable resource?
a. The sun does not cause pollution.
b. The sun creates biomass.
c. The sun is continuously releasing energy.
What is the hydronium ion concetration of a ph=9. 2 solution
The hydronium ion concentration of a pH = 9.2 of solution is 6.3 × 10⁻¹⁰M.
How do we calculate pH?pH of the solution is define as the negative logarithm of the concentration of the hydronium ion as:
pH = -log[H⁺]
Or [H⁺] = [tex]10^{-pH}[/tex]
Given that pH value = 9.2
On putting values, we get
[H⁺] = [tex]10^{-9.2}[/tex] = 6.3 × 10⁻¹⁰M
Hence required concentration of hydronium ion is 6.3 × 10⁻¹⁰M.
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What pressure is required to contain 0.644 grams of nitrogen gas (N2) in a 4.2 L container at a temperature of 20 degrees Celsius?
**I NEED ANSWERS STEP BY STEP PLEASE**
0.13 atm pressure is required to contain 0.644 grams of nitrogen gas ([tex]N_{2}[/tex]) in a 4.2 L container at a temperature of 20 degrees Celsius.
What is an ideal gas equation?The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas. The terms are: p = pressure, in pascals (Pa). V = volume, in [tex]m^3[/tex].
Calculating moles of [tex]N_{2}[/tex]:
Moles = [tex]\frac{Given mass}{ molar mass}[/tex]
Moles = [tex]\frac{0.644 }{ 28}[/tex]
Moles = 0.023
Now, using the Ideal Gas Law;
PV=nRT
We can rearrange to solve for pressure:
P=nRT/V
P is pressure, n is the number of moles (0.023), R is a constant (0.08206 L*atm/mol*K), T is the temperature in Kelvin (293.15K) and V is volume, 4.2 L.
So, plugging in;
P=[tex]\frac{(\;0.023\;mol)(0.08206\;L*\;atm\;/\;mol\;*\;K)(\;293.15\;K)}{(\;4.2\; L)}[/tex]
P=0.1317 atm
Hence, 0.13 atm pressure is required to contain 0.644 grams of nitrogen gas ([tex]N_{2}[/tex]) in a 4.2 L container at a temperature of 20 degrees Celsius.
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Your best friend has passed on.write a tribute to him /her stating that person's characters and his/ her contribution to the society.
Answer:
a person with full of dignity and my best friend is now no more with me .
a hydrochloric acid solution HCI has a concentration of 12.1 M. A 41.2 mL sample is used to make a more dilute solution. If the new solution has a concentration of 0.5 M determine the volume of the solution
If the new solution has a concentration of 0.5 M, then the volume of the solution is 997mL.
How do we calculate the required volume?Required volume of the new solution will be calculated by using the below equation as:
M₁V₁ = M₂V₂, where
M₁ & V₁ are the molarity and volume of initial HCl solution.
M₂ & V₂ are the molarity and volume of final HCl solution.
On putting values from the question, to the above question we get:
V₂ = (12.1)(41.2) / (0.5) = 997 mL
Hence resultant volume of the final solution is 997 mL.
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A cone-shaped landform develops when magma erupts from the _______ forming a volcano science
Answer:
Magma chamber
Explanation:
When a volcano erupts, the magma (also called lava when out of the magma chamber) erupts out of the vents.
you are working as an analytical ghemist at a university. an archeologist is studying a village
dating to 800 to 1000 years ago brings you a sample of charcoal from a dig site 300 meters from
the main village site. the archeologist asks you to analyze the sample to see if it could be from a
new part of the village or was it naturally occurring. what is the scientific question the
archeologist is asking of you?
The scientific question that is being asked by the archeologist is the age of the sample.
What is a scientific question?A scientific question is a question that can be answered empirically. That is, the question can be answered through an experiment.
Given the explanation in the question, the scientific question that is being asked by the archeologist is the age of the sample.
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What type of molecule is pentanal?
o a. ester
b. alcohol
o c. ketone
o d. aldehyde
i will mark brainliest!!!!
ANSWER ASAP!!!! PLS HELP
Answer: increase
Explanation: as pressure is increased, equlilibrium shifts towards the side with less moles of gas.
Do tanning beds have nuclear fission or fusion?
Answer:
Neither? If it must be one then fission.
Explanation:
I actually didn't know they had fission, but I can absolutely gaurantee that they don't use fusion, nuclear fusion is a process that fuses hydrogen atoms together and releases a massive amount of energy, it used in hydrogen bombs and by our sun. It's a process that needs a massive amount of energy to kickstart and there's no way that technology would fit in a tanning bed. If I'm wrong then please tell me.
Hope this is a good answer.
What does a positive value of A Gº mean for a reaction?
O A. The reaction is spontaneous if AS<0.
O
B. The reaction is spontaneous.
C. The reaction is spontaneous if A S> 0.
D. The reaction is nonspontaneous.
Answer:
D
Explanation:
If delta G at standard conditions is positive, then the reaction will always be nonspontaneous in the forward direction.
How many protons does Pb4+ have
Answer:
82
Explanation:
the 4+ does not change the number of protons...it changes the number of ELECTRONS....
from a periodic table of elements the number of protons = 82
Can the law of conservation of mass be applied when cooking? In one to two sentences, explain why or why not. Please give an example without water.
The law of conservation of mass is must be applied when cooking.
What is conservation of mass?Law of conservation of mass states that mass of any substance will change into another form without any loss of mass, means destroying of mass is impossible.
When we cook food then mass of conservation is applied there, for example we are boiling pulses with water then in that case the amount of formed liquid pulses is equal to the initial mass of solid pulse with water.
Hence law of conservation of mass is applicable during cooking.
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Under what conditions of temperature and pressure is a gas least soluble in water
The conditions of temperature and pressure in which a gas least soluble in water is low pressure and high temperature.
What is Henry Law?The amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid, according to Henry's law.
From this law it is clear that:
As the pressure of the gas increases solubility of the gas on the liquid also increases.But if the temperature of the liquid decreases then the solubility of the gas also increases.
Hence at low pressure and high temperature, gas is least soluble.
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Can some please help me complete this for me it’s due today!
6.50x10^4+8.70x10^5 express the following in scientific notation.
Answer:
9.35 × 10⁵
Explanation:
( 6.50 × 10⁴ ) + ( 8.70 × 10⁵ ) = 935,000
935,000 = 9.35 × 10⁵
9. The use of lubricants makes the surface
(a) Rough
(b)Smooth
(c)Very Rough
(d)None of the above
Answer:
B
Explanation:
Which of the following radiactive elements was often put in beauty products?
Francium
Curium
Radium
Uranium
Answer:
Radium
Explanation:
Radium is a radioactive element which was often put in beauty products.
How many moles are in 1.5x1023 molecules of Na2SO4?
please help The sun uses nuclear fusion to generate its energy. In the very distant future, the sun will eventually run out of fuel.
A. All the hydrogen and smaller elements will eventually will fuse into larger elements until fusion is longer possible
B. the sun will stop burning once all the atoms have spilt
Answer:
A
Explanation:
the answer is a because the sun cannot stop burning but will rather burn hotter Then decay amongst the atoms in space
Which of the following is a compound?
sodium
iron
carbon dioxide
chicken noodle soup
When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties. Here among the given options, the compound is carbon dioxide. The correct option is C.
What is a compound?The chemical substances which are made up of two or more elements that are chemically bound together in a definite ratio are defined as the compounds. The compounds are represented by the chemical formula.
A chemical formula is the symbolic representation of atoms which constitute a particular chemical compound. The chemical formula of water is H₂O, which contains 'H' and 'O' atoms.
Here the chemical formula of the compound carbon dioxide is CO₂ and it is made up of two different elements, they are 'C' and 'O' atoms. The type of bonds in a compound may be ionic or covalent.
Thus the correct option is C.
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which lunar phase will occur about four days after a waxing crescent?
A. waning crescent
B.first quarter
C.full moon
D.waning gibbous
Answer:3.5 days is awfully precise and waxing gibbous is awfully vague.Let’s just make sure we understand our terminology. Waxing means getting fatter and gibbous means fat. A waxing gibbous moon lasts for approximately 7 days from the first quarter phase right up to the full moon phase.By 3.5 days I’m assuming you mean half a week and simplifying the lunar phases to 28 days exactly.So we have:Day 0 New moon.Day 7 First quarter.Day 14 Full moon.Day 21 Third quarter.Day 28 New Moon.Between day 0 - 7 we have the waxing crescent phase.Between day 7–14 we have the waxing gibbous phase.Between day 14–21 we have the waning gibbous phase.Between day 21–28 we have the waning crescent phase.So 3.5 days from day 7 would take us to day 10.5 which would still leave us in the waxing gibbous phase. 3.5 days after day 10.5 would take us to the full moon or over into the waning gibbous phase since the full moon lasts only an instant.
Explanation:
Waning gibbous is the lunar phase which will occur about four days after a waxing crescent. Therefore, the correct option is option D.
What is lunar phase?The lunar phase and Moon phase is indeed the shape of the directly illuminated section of the Moon, which may be described quantitatively using areas and angles. The lunar month is typically 29.53 days as seen from Earth.
The four major phases (new moon, first quarter, full moon, and last quarter) and four minor phases are qualitatively described. The orbital locations of the Moon round Earth and Earth from around Sun fluctuate throughout the course of a synodic month (about 29.53 days), which causes a gradual change in the lunar phases. Waning gibbous is the lunar phase which will occur about four days after a waxing crescent.
Therefore, the correct option is option D.
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Iron(111)Carbonate +cesium > cesium carbonate +iron balced
Balanced chemical equation for the given reaction is Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe.
What is balanced equation?Balanced chemical equations are those equations in which all entities are present in equal amount on reactant side as well as on product side.
Given balanced chemical reaction is:
Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe
Above given equation is a balanced chemical equation where all atoms of reactant as well as of products are present in same amount.
Hence, required balanced equation is Fe₂(CO₃)₃ + 6Cs → 3Cs₂CO₃ + 2Fe.
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