No of moles:-
No of molecules/Avagadro no5.5×10²³÷6.022×10²³0.91molNow
molar mass:-
CaCO_340+12+48100g/molMass:-
100(0.91)91gOption B
If a gas has a volume of 1.25 l at a temperature of 300 k, what will the volume change to if the container is cooled to 200k
The volume of the gas when the container is cooled from a temperature of 300 K to 200 K is 0.83 L
Charles' law
Charles' law states as follow:
V₁ / T₁ = V₂ / T₂
Where
V₁ is the initial volume T₁ is the initial temperature V₂ is the new volume T₂ is the new temperature How to determine the new volumeFrom the question given above, the following data were obtained
Initial volume (V₁) = 1.25 LInitial temperature (T₁) = 300 KNew temperature (T₂) = 200 KNew Volume (V₂) =?V₁ / T₁ = V₂ / T₂
1.25 / 300 = V₂ / 200
Cross multiply
300 × V₂ = 1.25 × 200
Divide both side by 300
V₂ = (1.25 × 200) / 300
V₂ = 0.83 L
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1. Define the unit 'mole'
Answer:
Below
Explanation:
The mole, symbol mol, is the SI base unit of amount of substance. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample
The solubility of a gas is 0.890 g/L at a pressure of 120 kPa. What is the solubility of the gas if the pressure is changed to 100 kPa, given that the temperature is held constant?
The solubility of the gas if the pressure is changed to 100 kPa is 0.742 g/L
Effect of Pressure on SolubilityAs the pressure of a gas increases, the solubility increases, and as the pressure of a gas decreases, the solubility decreases.
Thus, Solubility varies directly with Pressure
If S represents Solubility and P represents Pressure,
Then we can write that
S ∝ P
Introducing proportionality constant, k
S = kP
S/P = k
∴ We can write that
[tex]\frac{S_{1} }{P_{1} } = \frac{S_{2} }{P_{2} }[/tex]
Where [tex]S_{1}[/tex] is the initial solubility
[tex]P_{1}[/tex] is the initial pressure
[tex]S_{2}[/tex] is the final solubility
[tex]P_{2}[/tex] is the final pressure
From the given information
[tex]S_{1} = 0.890 \ g/L[/tex]
[tex]P_{1} = 120 \ kPa[/tex]
[tex]P_{2} = 100 \ kPa[/tex]
Putting the parameters into the formula, we get
[tex]\frac{0.890}{120}=\frac{S_{2}}{100}[/tex]
[tex]S_{2}= \frac{0.890 \times 100}{120}[/tex]
[tex]S_{2}= 0.742 \ g/L[/tex]
Hence, the solubility of the gas if the pressure is changed to 100 kPa is 0.742 g/L
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What is the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K?
The pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
How to calculate pressure?The pressure of a given mass of gas can be calculated using the following formula:
PV = nRT
Where;
P = pressureV = volumeT = temperaturen = no of molesR = gas law constantThe number of moles in 50.5g of Chlorine gas is as follows:
moles = 50.5/70.91
moles = 0.71mol
P × 8 = 0.71 × 0.0821 × 365
8P = 21..34
P = 21.34/8
P = 2.67atm
Therefore, the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.
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I dont understand. Please help me.
Answer:
B
Explanation:
it's has more water and will go active way faster
Answer:
Beaker b
Explanation:
This is because the temperature in beaker b is higher. Hot water has more kinetic energy. Therefore, it's particles move faster and collide more frequently with the particles of antacid tablet. So, the reaction occurs faster.
Hope this helps =)
Draw the major product of the given reaction. Include minimized formal charges.
The major product of the given chemical reaction is given as drawn in the attached picture.
What is a Major Product in Chemistry?A major product in chemistry refers to the product whose amount is the greatest after a chemical reaction has taken place.
In order to find the major product, it is required for the Markovnikov Rule to be applied.
This rule states that when hydrogen is mixed with carbon with more hydrogen, then the major product will be gotten.
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What percentage of Earth's land is used for agriculture?
40%
20%
50%
10%
Answer:
40%
Explanation:
hope it helps! God bless
Answer:
40% of Earth's land is used for agriculture.
what type of chemical reaction is Cu(NO3)2 + NaOH to Cu(OH)2 + NaNO3
Answer:
Cu(NO 3) 2 (aq) + 2 NaOH (aq) → Cu(OH) 2 (s) + 2 NaNO 3 (aq) This is a precipitation reaction: Cu(OH) 2 is the formed precipitate.
Explanation:
what could you and your classmates do to reduce human impact on land
giving brainiest
Answer:
have controlled population!
Explanation:
The buffer that is adjusted to control acid-base balance is ________. plasma protein hemoglobin phosphate buffer bicarbonate: carbonic acid buffer
The buffer that is adjusted to control acid-base balance is referred to as a bicarbonate buffer.
What is a Buffer?This consists of a weak acid and its conjugate base, or vice versa and resist changes in the pH of the solution.
The bicarbonate buffer is involved in acid-base homeostasis by removing CO2 and hydrogen ions, respectively, from the body.
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Which additional product balances the reaction H2SO4 + 2NaOH → Na2SO4 + ________?
2H2O
2OH
H2O2
H3O
Answer:
2H2O
It's a double displacement reaction
giving brainliest please help!
How do you feel about GM food?
Answer: I think it's ok, but I have a neutral stance on it.
Explanation: Foods are genetically modified to preserve them and I've had my fair share of wasted money and bad expired food, so I'm a-ok on GM food.
Answer:
Well I think that we should use more for tride or give to our allies
Explanation:
How much water should be added to 85 mL of a 10.0 M stock solution to produce
a 1.0 M dilute solution
765
Explanation:
C1V1=C2V2
10×85=1×V2
V2=850
V'=V2-V2
V'=850-85
V'=765ml
What is the best reason that fire is not considered a living organism?.
Answer:
all living organisms have cells fire does not
Which of the mechanical waves below has the most energy?
A. Red
B. Blue
C. Green
D. Gold
Answer:
A. Red
Explanation:
Which substances are contained in saliva and tears to break down pathogens?
enzymes
acids
oils
sweat
Answer:
A. Enzymes
Explanation:
Enzymes are in our saliva and tears. They help break down pathogens and the cell wall of bacteria.
I hope it helps! Have a great day!
Muffin~
Answer:
A. Enzymes.
Explanation:
Enzymes break down things and they are in both our saliva and tears.
I hope it helps! Have a great day!
.-.
2) The coregion in the area of the Texas Panhandle. This coregion is level plates that ranges in elevation from 3000 to 4500. This is very fry dry and
the characteristics of this coon we would expect to see plenty of
A) wind ersoin
B) water ersoin
C) deposition of sediment
Answer:
the correct answer is B po sure po ako
Explanation:
Sure na sure po
Answer:
The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico? desert. A.
Explanation:
If one 330 mL Coca-Cola contains 170 grams of dissolved C*O_{2} how many H^ + ions are made if 70% of the dissolved C*O_{2} reacts completely with water until it is a simple carbonate ion (CO 3 ^ 2- ) ?
Please help me!!!
Answer:
bu bir kimya sorusu sanırim
SOMEONE HELP! 100 points have only 2 minutes!
How will different pH levels provide more information?
The neutral phase of a ph scale is 7.
A ph higher than 7 indicates that the substance is basic in nature.
14 is the most basic and 8 is the least basic
A ph lower than 7 indicates the substance is acidic in nature.
1 is the most acidic and 6 is the least acidic.
Complete and balance the following equation K+H2O
Explanation:
hello
2K + 2H2O ==》2KOH + H2
_______ are similar to molecular formulas but show how atoms are bonded together.
Answer
The structural formula are similar to molecular formulas but show how atoms are bonded together.
Explanation:
The structural formula for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule.
How does colour affect temperature? Provide reasons and must be a few sentences.
Answer:
The more light an object absorbs, the more it heats up when it is exposed to light, which is why dark things get hot more quickly than light things if left out in the sun.
How many grams are in 2.3 moles of N?
Answer:
Therefore, 40.4 grams are contained in 2 moles of Neon.
A sample of no2 occupies 16,500 ml at stp. How many no2 molecules are in the sample?.
According to Avogadro's law equal volume of all gases at the same temperature and pressure contain equal number of molecules. At STP one mole of any gas behaving ideally occupies a volume of 22.414 L.
What is molar volume?The volume occupied by one mole of a substance at a given temperature and pressure is defined as the molar volume at that temperature and pressure. The value of molar volume of an ideal gas at STP is important in stoichiometric calculations.
At STP, the number of molecules of a gas is given as:
Number of molecules of a gas (N) = V₀ in L / 22.414 × 6.022 × 10²³
Here V₀ in L = 16500 = 16.5 L
N = 16.5 / 22.414 × 6.022 × 10²³
N = 4.433 × 10²³
Thus the number of molecules present is 4.432 × 10²³.
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what is the concentration of OH− in a solution with a pOH value of 6.09
Answer:
I'm not sure
Explanation:
I'm just not sure
1. -A mixture of aluminum metal and chlorine gas reacts to form aluminum chloride (AlCl3): 2Al(s) +
3Cl2(g) → 2AlCl3(s). How many moles of aluminum chloride will form when 5 moles of chlorine gas react
with excess aluminum metal?
Answer:
3.33 moles
Explanation:
We know that our limiting reactant is chlorine so we just have to figure out how much of the product aluminum chloride (AlCl3) would be formed from 5 moles of chlorine gas. As we can see in the balanced equation, the mole ratio of chlorine gas (Cl2) to aluminum chloride is 3:2 based on the coefficients of the species. All you have to do from here is divide the amount of moles of chlorine gas by its own coefficient and then multiply the number you receive by the coefficient of AlCl3.
5/3=1.66
1.66*2=3.33
Distinguish between an acidic and a basic oxide.
(Select all that apply.)
A basic oxide is an oxide that reacts with acids.
An acidic oxide is an oxide that reacts with acids.
In a basic oxide, element forms covalent bonds with oxygen.
In an acidic oxide, element forms ionic bonds with oxygen.
In an acidic oxide, element forms covalent bonds with oxygen.
In a basic oxide, element forms ionic bonds with oxygen.
An acidic oxide is an oxide that reacts with bases.
A basic oxide is an oxide that reacts with bases.
Answer:
an acidic oxide reacts with bases and the seconf
PLEASEE HELPPP
what is the ph of 1.0 times 10^-2 M HBr
Answer:
The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).
Explanation:
7. Reproduce the following sentences as indicated in brackets. a. Urmila always goes to temple, .................... ? (Supply the correct question tag) b. The baby was playing with a doll. (Change into interrogative) c. Peter will start a business next year. (Change into "when" question) d. They .............. (not finish)......... the work yet. (Put the verb in the bracket in the correct tense) e. She said to me, "My brother knows you." (Change into indirect speech) f. Ram married Sita. (Change into passive voice)
Answer:
a. Urmila always goes to the temple, doesn't she?
b. Was the baby playing with the doll?
c. When will Peter start a business?
d. They have not finished the work yet.
e. She told me that her brother knows me.
f. Sita was married by Ram.
Explanation:
A. In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in 'She said half price, didn't she?' , the words 'didn't she' are a question tag.
B. Interrogative questions/sentences often have to get a yes/no answer.
C. The "next year" will be the answer to that question. U need to ask when.
D. The have not done the work yet, therefore the answer would change from "not finish" to "have not finished"
E. Indirect speech is speech which tells you what someone said. It's like the game "telephone" indirect speech is what you tell someone else, what another person said, or what someone else tells you what another person said.
F. Passive voice means that a subject is a recipient of a verb's action.
