Answer:
11.0 dm³
Explanation:
From the question,
Applying
PV= nRT............... Equation 1
Where P = pressure of oxygen gas, V = volume of oxygen gas, n = number of moles of oxygen, R = molar constant, T = Temperature.
make V the subeject of the equation
V = nRT/P............. Equation 2
But,
Number of mole (n) = Mass of oxygen(m)/Molar mass of oxygen(m')
n = m/m'....................... Equation 3
Substitute equation 3 into equation 2
V = mRT/Pm'............. Equation 4
Given: T = 28°C = (28+273) = 301 K, P = 0.998 torr = (0.998×0.00131579) = 1.3132 atm, m = 18.4 g
Constant: R = 0.082 atm.dm³/K.mol, m' = 32 g/mol.
Substitute these values into equation 4
V = (301×18.4×0.082)/(32×1.3132)
V = 454.1488/42.0224
V = 10.81 dm³
V = 11.0 dm³
as- The salt left in the evaporating
basin is often a little dirty
suggest what you could do to
get cleaner salt
Answer:
Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .keep eye protection on and do not get too close. Turn off the Bunsen burner and let the damp salt dry in the dish
In evaporation particles of water take energy in the form of sunlight from the surrounding and then convert into vapor phase. Therefore heating is the only technique for getting pure salt.
What is evaporation?Evaporation is a physical process in which the water in liquid state converts to gaseous state at the temperature below its boiling point. Evaporation happens before the boiling process.
Evaporation causes cooling effect in the surrounding. During summer when water is kept in earthen pot water cools, this is because of the evaporation process.
Evaporation is affected by temperature. As the temperature increases the rate of evaporation increases and hence in summer there is more evaporation and hence there is lot more water in air.
Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .Turn off the Bunsen burner and let the damp salt dry in the dish.
Therefore heating is the only technique for getting pure salt.
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250J of heat was added to a 2 g block of metal. The temperature of the metal was increased by 139.4K. What is the specific heat capacity of the metal?
Use the below equation to calculate specific heat capacity.
Include three decimal places and do not use units in your answer.
cmetal = Q/mΔT
Answer:
0.897
Explanation:
A 0.582 mol sample of an ideal gas is at 15°C and 18.8 atm. Calculate the volume for this gas.
Answer: The volume for this gas is 0.732 L.
Explanation:
Given : No. of moles = 0.582 mol
Temperature = [tex]15^{o}C = (15 + 273) K = 288 K[/tex]
Pressure = 18.8 atm
Using the ideal gas equation, volume for the given gas is calculated as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula.
[tex]PV = nRT\\18.8 atm \times V = 0.582 mol \times 0.0821 L atm/mol K \times 288 K\\V = \frac{0.582 mol \times 0.0821 L atm/mol K \times 288 K}{18.8}\\= \frac{13.761}{18.8}\\= 0.732 L[/tex]
Therefore, it can be concluded that the volume for this gas is 0.732 L.
PLeaseee ITS Timedddd + BrainlIESTT
A 6.50 gram piece of aluminum reacts with an excess of oxygen. use the balanced equation below to determine how many grams of aluminum oxide is formed during this reaction.
4 Al + 3 O2 --> 2 Al2O3
a. 662.7 grams of Al2O3
b. 6.1 grams of Al2O3
c. 24.6 grams of Al2O3
d. 12..3 grams of Al2O3
Answer:
d. 12.3 grams of Al2O3
Explanation:
Based on the reaction:
4Al + 3O2 → 2Al2O3
Where 4 moles of Al reacts in excess of oxygen to produce 2 moles of aluminium oxide.
To solve this question we must find the moles of Aluminium. With these moles we can find the moles of aluminium oxide using the reaction:
Moles Al -Molar mass: 26.9815g/mol-
6.50g * (1mol / 26.9815g) = 0.241 moles Al
Mass Al₂O₃ -Molar mass: 101.96g/mol-
0.241 moles Al * (2 mol Al2O3 / 4 mol Al) = 0.120 moles Al2O3
0.120 moles Al2O3 * (101.96g / mol) =
12.3g of Al2O3 are produced.
Right answer is:
d. 12.3 grams of Al2O3GAS LAW:
If 2.2 liter of hydrogen are heated from 0 degrees celsius to 95 degrees celsius at the constant pressure what is the new volume?
Answer:
bh yftd5xsdcfvgbhnjm
Explanation:
How many moles are present in 34 grams of Cu(OH)2? Show How you got the Answer
Answer:
0.347
Explanation:
moles= mass/molecular mass
moles= 34/64+(16×2)+(1×2)
moles=34/98
= 0.347 (3.s.f)
Which statement describes particles of an ideal gas, based on the kinetic molecular theory?
A) Gas particles are separated by distances smaller than the size of the gas particles.
B) Gas particles do not transfer energy to each other when they collide.
C) Gas particles have no attractive forces between them.
D) Gas particles move in predictable, circular motion.
Answer:
The answer is C. Gas particles have no attractive forces between them.
Explanation:
Answer:
I also think the answer is C
A truck can carry a maximum load of 8000 kg.
The truck is loaded with packages each with a mass of 35 kg
correct to two significant figures.
Calculate the maximum number of packages
that the truck can carry.
did any one tell me the answer it's from lower and upper bound chapter
Foods that are basic can be identified by what taste
Explanation:
sweet,sour,salty, savoury
Answer: bitter
Explanation:
What is the initial reactant for a fusion reaction in the sun?
a) Iron-56
b) Hydrogen-1
Hydrogen
Pog Pog Pog I'm a PogChamp
Hydrogen-1 serves as the starting reactant in fusion reactions in the sun. This is due to the sun's composition, which is around 70% hydrogen and 28% helium with 2% heavier components. As a result, hydrogen-1 is both the most prevalent and most likely to be employed in a fusion process in the sun.
What is the way to make helium-4 ?Two hydrogen-1 nuclei are fused together to create a helium-4 nucleus in the sun's fusion reaction, which releases energy in the process. This is the most significant energy source in the sun and is known as the proton-proton chain reaction.
When two hydrogen-1 nuclei collide to generate a deuterium nucleus, a gamma ray is released as a result, starting the reaction. Then, this deuterium nucleus strikes another.A helium-3 nucleus is created from a hydrogen-1 nucleus, which also produces a gamma ray.
The reaction is finally finished when two helium-3 nuclei meet to produce a helium-4 nucleus, producing two gamma rays in the process. Since hydrogen-1 is the most prevalent element in the sun and the element that is most likely to be employed in the proton-proton chain reaction, it is the first reactant for a fusion process in the sun.
A deuterium nucleus is created by the collision of two hydrogen-1 nuclei, which is followed by a sequence of further processes that ultimately result in the development of a helium-4 nucleus.
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What is the relationship between the streams velocity and the rate of erosion?
Earth science
Answer:
If the water velocity decreases, the rate of erosion increases
Explanation:
Science study island
Answer:
C)
Explanation:
They can move at rates of up to four inches (10 centimeters) per year, but most move much slower than that. Different parts of a plate move at different speeds. The plates move in different directions, colliding, moving away from, and sliding past one another. Most plates are made of both oceanic and continental crust.
What is the concentration of a solution with a volume of .45 L that contains .9 moles of Iron (II) chloride?
Answer:
the concentration of the solution is 2 mol/L.
Explanation:
Molarity is defined as the concentration of a solution expressed in terms number of moles of solute per liter of solution.
Mathematically Molarity is expressed as follow;
[tex]Molarity = \frac{Moles \ of \ solute}{Liters \ of \ solution} \\\\[/tex]
Given;
Volume of the solution, V = 0.45 L
Moles of the solute, n = 0.9 moles
The concentration of the solution [tex]= \frac{0.9}{0.45} = 2 \ mol/L[/tex]
Therefore, the concentration of the solution is 2 mol/L.
8. What is involved in building and running the mine
Answer:
Explanation:
minimizing environmental effects.
ensuring public health and safety.
preserving water quality.
establishing new landforms and vegetation.
removing waste and hazardous material.
stabilizing land to protect against erosion.
HELP!! ASSIGNMENT DUE TODAY! PLEASE HELP!!! I'LL GIVE 21 POINTS!!!!
Respiration occurs in the cytoplasm and _________ of cells.
mitochondria
im not 100% sure but it makes sense
Balance the following reaction _ Al + _ Cl, → _ AICI,
Answer:
1 Al + 1 Cl -> 1 AlCl
Explanation:
It is already balanced.
PLEASE HELP!!!! Assuming a lacrosse ball weighs 5.5 ounces and is made of mainly rubber which has a mass of 82.2 g/mol, how many particles are in a lacrosse ball?
Sally adds 3.13 moles of argon to a 5.29 liter balloon that already contained 4.21 moles of argonWhat is the volume of the balloon after the addition of the extra gas?
1 point
Calculate the [H+] in a solution with a pH of 3.71, and identify the solution
as acidic, basic or neutral. *
1.9x10^-4 M ; acidic
5.12x10^-10; acidic
02.4x10^-3 M ; basic
Answer:
I don't have any idea of this question
How much energy is transferred from a plant to an herbivore that eats it? A. 5% B. 10% C. 20% D. 90%
Answer:
B. 10%
Explanation:
The nucleus in the center of an atom contains ___ and __ ?
Answer:
protons and neutrons
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
What is the name of this hydrocarbon
Answer:
the IUPAC name of the following compound is 2,3 dimethyl pentane!
How many moles of CO2 gas will be produced in the reaction between baking soda (sodium hydrogen carbonate) and vinegar (acetic acid) if 6 mol of baking soda is reacted in excess vinegar?
Answer:
[tex]6molCO_2[/tex]
Explanation:
Hello there!
In this case, according to the described reaction, we can set up the chemical equation as shown below:
[tex]NaHCO_3+CH_3COOH\rightarrow CO_2+H_2O+CH_3COONa[/tex]
We can evidence the 1:1 mole ratio of baking soda (NaHCO3) to CO2 and therefore the produced moles of latter are calculated as shown below:
[tex]6molNaHCO_3*\frac{1molCO_2}{1molNaHCO_3} \\\\6molCO_2[/tex]
Best regards!
Which of the following solution(s) would be a buffer? Select all that apply.
a. 100.0 mL of a solution that contains 0.100 M benzoic acid and 0.100 M potassium benzoate
b. 100.0 mL of a 0.100 M propanoic acid to which 50.0 mL of 0.100 M sodium hydroxide has been added
c. 100.0 mL of a 0.100 M formic acid solution
d. 100.0 mL of a solution that contains 0.100 M hydrochloric acid and 0.100 M sodium chloride
e. 100.0 mL of a 0.100 M solution of acetic acid in which 0.100 g of sodium acetate is dissolved
As a buffer is defined as the aqueous mixture of a weak acid and its conjugate base. Or a weak base and its conjugate acid. Thus:
a, b and e would be a buffer.The benzoic acid is a weak acid, its conjugate base is the benzoate ion that comes from potassium benzoate. Thus: a is a buffer.
Propanoic acid (weak acid) reacts with a strong base as sodium hydroxide producing its conjugate base (propanoate ion). Thus, b is a buffer.
Formic acid is a weak acid but its conjugate base, formate ion is not present in the solution. Thus, c is not a buffer.
Hydrochloric acid is a strong acid and sodium chloride a salt. Thus, d is not a buffer.
Acetic acid is a weak acid, and its conjugate base, acetate ion (That comes from sodium acetate) is present in the solution. Thus, e is a buffer.
Plz help question is in attachment
Answer:
The total mass will be same of both side!!!!! ig so
6. Too much rainwater can cause a slope or hillside to collapse through a process called a
(6 Points)
mudslide
snowslide
o avalanche
storm
Answer:
mudslide
Explanation:
a mass of mud and other earthy material that is falling or has fallen down a hillside or other slope
Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure?
1) 5*10^23 molecules of O2
2) 263 grams of Xe
3) 0.403 moles CH4
4) they would all have the same volume
Answer:
d
Explanation:
they would all have the same volumes
A sample of gas at 250 K has a pressure of 0.857 atm and a volume of 115 L. How many moles of gas are in the sample?
Answer:
0.208 mol
Explanation:
Assuming the gas sample behaves like an ideal gas, we can solve this problem by using the following formula:
PV = nRTWhere:
P = 0.857 atmV = 115 Ln = ?R = 0.082 atm·L·mol⁻¹·K⁻¹T = 250 KWe input the data:
0.857 atm * 115 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 250 KAnd solve for n:
n = 0.208 molScience there’s a picture
Answer:
D)
Explanation:
seems like the most logical option out of all listed.
How many molecules are in 88g of carbon dioxide?
Answer:there are 44 grams