52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
What is Ideal Gas Law ?The ideal gas law states that the pressure of a gas is directly proportional to the volume and temperature of the gas.
It is expressed as
PV = nRT
where,
P is pressure
V is volume in liters
n is number of moles of gas
R is Ideal gas constant
T is Temperature in kelvin
What is Balanced Chemical equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now first we have to write the balanced chemical equation
Mg + 2HCl → MgCl₂ + H₂
Here we can se that 2 mole of hydrochloric acid produces 1 mole of hydrogen gas.
So 4 moles of hydrochloric gas will give [tex]\frac{1}{2} \times 4[/tex] moles of hydrogen gas that is 2 moles of hydrogen gas.
Now put the values in above equation, we get
PV = nRT
0.940 atm × V = 2 × 0.0821 L atm / K mol × 298
V = [tex]\frac{2 \times 0.0821\ \text{L atm / K mol} \times 298}{0.940\ \text{atm}}[/tex]
V = 52.05 liter
Thus from the above conclusion we can say that 52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
Learn more about the Ideal gas law here: https://brainly.com/question/25290815
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14. Calculate What is the
concentration of a solution if it has 55 g of sugar dissolved in 500 mL of water? Show
your work
2 plus 2 is 4 because it just doo
A random radioisotope has a decay constant of 0.00238 years-1. If
1165 years have past, and there was originally 80 grams of it,
roughly how many grams of the original radioisotope remain?
Answer:
5 grams remain
Explanation:
A = A₀exp(-k·t) 80g·exp(-0.00238yr⁻¹)(1165yrs) = 80g x 0.063 = 5 grams remain
Easy Chem, Will Give brainliest
Answer:
3.94 L
Explanation:
From the question given above, the following data were obtained:
Mass of O₂ = 5.62 g
Volume of O₂ =?
Next, we shall determine the number of mole present in 5.62 g of O₂. This can be obtained as follow:
Mass of O₂ = 5.62 g
Molar mass of O₂ = 2 × 16 = 32 g/mol
Mole of O₂ =?
Mole = mass / molar mass
Mole of O₂ = 5.62 / 32
Mole of O₂ = 0.176 mole
Finally, we shall determine the volume of 5.62 g (i.e 0.176 mole) of O₂ at STP. This can be obtained as follow:
1 mole of O₂ occupied 22.4 L at STP.
Therefore, 0.176 mole of O₂ will occupy = 0.176 × 22.4 = 3.94 L at STP.
Thus 5.62 g (i.e 0.176 mole) of O₂ occupied 3.94 L at STP
what type of energy is playing the piano
A.light
B. Thermal
C.electrical
D.mechanical
E.sound
Answer:
E sound
Explanation:
give the name of the method used to extract aluminium
Which has the least molecular kinetic energy?
water molecules in ...
A. a cloud
B. the ocean
C. Frozen pond
D. Pot of boiling water
3. When 10.0 g of a pure compound was analyzed, it was found to contain 3.65 g of K, 3.33 g of CI,
and 3.02 g of O. Determine the empirical formula of the compound.
Use the following equation to answer the questions below:
Be + 2HCl → BeCl2 + H2
Answers are rounded.. pick the closest to your answer.
What is the mass of beryllium required to produce 25.0g of beryllium chloride? g
What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g
What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g
Explanation:
The equation of the reaction is given as;
Be + 2HCl → BeCl2 + H2
What is the mass of beryllium required to produce 25.0g of beryllium chloride?
1 mol of Be produces 1 mol of BeCl2
Converting to mass;
Mass = Molar mass * Number of moles
9.01g of Be produces 79.92g of BeCl2
xg of Be produces 25g of BeCl2
Solving for x;
x = 25 * 9.01 / 79.92
x = 2.82 g
What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g
Converting 25.0g of beryllium chloride to moles;
Number of moles = Mass / Molar mass
Number of moles = 25 / 79.92 = 0.3128 mol
2 mol of HCl produces 1 mol of BeCl2
x mol of HCl would produce 0.3128 mol of BeCl2
solving for x;
x = 0.3128 * 2 = 0.6256 mol
Converting to mass;
Mass = 0.6256 * 36.5 = 22.83 g
What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g
25g of BeCl2 = 0.3128 mol of BeCl2
From the equation;
1 mol of H2 is produced alongside 1 mol of BeCl2
This means;
0.3128 mol of H2 would also be produced alongside 0.3128 mol of BeCl2
Mass = Number of moles * Molar mass
Mass = 0.3128mol * 2.0159 g/mol = 0.6306 g
24.50 g of Na react with H20 to make sodium hydroxide and H2 gas. How much sodium
hydroxide is made if there is an excess of water?
Answer:
hay 4,240 gr
Explanation:
2Na + 2 H20 - --- 2 NO(OH) -+ H2n pued o es criibreo
Part A
Consider the following neutral electron configurations in which n has a constant value. Which configuration
would belong to the element with the most negative electron affinity, Eea?
View Available Hint(s)
a 2s2
b 2s²2p2
c 2s²2p5
d 2s²2p6
Answer:
c. 2s2 2p5
Explanation:
2s2 2p5 has 7 valence electrons and only needs one electron to complete the octet. This element will be the most electronegative.
Due to the tendency to form crystals instead of discrete molecules the formula unit is the representative particle for ___ compounds
Answer:ionic
Explanation:
This
Part A
A sample of ideal gas at room temperature occupies a volume of 21.0 L at a pressure of 712 torr. If the pressure changes to 3560 torr , with no change in
the temperature or moles of gas, what is the new volume, V?
Express your answer with the appropriate units.
View Available Hint(s)
HÅ
?
of 1
V2 =
Value
Units
Submit
Answer:
4.2 Liters (2 sig-figs)
Explanation:
Apply Boyles Law ... P₁V₁ = P₂V₂
P₁ = 712 Torr P₂ = 3560 Torr
V₁ = 21.0L V₂ = ?
P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂ = (712Torr)(21.0L)/(3560Torr) = 4.2 Liters (2 sig-figs)
Which two parts of sedimentary rock formation include the breakdown and carrying away of existing rock?
Answer:
Cementation
Erosion
Explanation:
Cementation refers to hardening and welding of those sediments which are formed from preexisting rock fragments as a result of the precipitation of mineral matter in the spaces between the pore. The last stage in the formation of a sedimentary rock is Cementation.
Erosion is the geological process in which soil, rock, or dissolved material are worn away and transported from one location to another location by natural forces such as wind or water.
The two parts of sedimentary rock formation which include the breakdown and carrying away of existing rock are cementation and erosion.
Answer: The answer is A: Cementation and Erosion
Explanation: Hope this helps! happy new year
Which element has the highest (most negative) electron affinity?
Ne, S,Na, Be, or Fe?
Answer:
S (Sulfur)
Explanation:
Electronegativity increases as you go up and right on the periodic table, excluding the noble gases on the rightmost column because they have zero electronegativity. S is the farthest right out of all the elements listed in the question excluding Ne.
Lab report enthalpy
If you have the actual lab report pls link it but can someone just share their data table pls. But if you have the lab report pls like seriously pls
Answer:
The purpose of this experiment was to verify Hess’s law associated with three reactions. Our experiment confirmed it by combining the enthalpy changes of two reactions to equal of that another single reaction (Reaction 2 in our case). Styrofoam cup was used as a calorimeter to measure the change in temperature, which is a necessary variable for further calculations. We discovered that sum of enthalpy changes for reactions one and three equaled the enthalpy change in reaction two. This experiment was possible because if one of the reactions is the same as the combination of other two, the heat of the reaction of the single reaction should be equal to the heat of other two reaction combined.
Explanation: when you see the reactions that the Hess's law to find the enthalpy, which we did from this lab.
Answer:
The data table is attached and it is the first one but I am not sure about the second one so hopefully someone figured it out
Explanation:
Ed ge 2021
Calculate the amount of heat energy required to melt 550.0 grams of copper, already at its melting point. NEED ASAP
Answer:
18,300 J
Explanation:
In order to be able to answer this question, you must know the value of water's enthalpy of fusion,
, which is listed as
ΔH↔ = 18,300J
Now, a substance's enthalpy of fusion tells you how much heat is needed in order to convert of said substance from solid at its melting point to liquid at its melting point.
In water's case, an enthalpy of fusion equal to
333.55 J g
333.55 J
of heat.
Your ice cube has a mass of
55.0 g
PLEASE HELP I WILL MARK BRAINLIEST!
In a forest, lynx prey on rodents and birds in the summer. But because of rising temperatures, the birds in the forest have migrated to a cooler place. What effect will this migration have on the population of the rodents?
Because there are fewer birds, the lynx will prey on rodents, leading to a BLANK in their population. This scenario depicts BLANK competition.
Blank 1:
decline
rise
stagnancy
Blank 2:
apparent
direct
intraspecific
Answer:
The answer is decline and apparent
Explanation:
I took the test and got it right
Assuming complete dissociation, what is the pH of a 3.11 mg/L Ba(OH)2 solution?
Answer:
pH = 9.56
Explanation:
Let's assume we have 1 liter of the solution. Then we would have 3.11 mg of Ba(OH)₂.
We convert 3.11 mg of Ba(OH)₂ into moles, using its molar mass:
3.11 mg / 1000 = 0.00311 g0.00311 g ÷ 171.34 g/mol = 1.82x10⁻⁵ mol Ba(OH)₂There are two OH⁻ moles per Ba(OH)₂ mol. Meaning there's (2*1.82x10⁻⁵) 3.63x10⁻⁵ moles of OH⁻.
As the volume is 1 L, the molar concentration of OH⁻, [OH⁻] is 3.63x10⁻⁵ M.
With the above information in mind we calculate the pOH of the solution:
pOH = -log[OH⁻] = 4.44Finally we calculate the pH:
pH = 14 - pOH = 9.56Which of the following is NOT a property of matter?
solubility
Hardness
Mass
Density
Answer:
hardness im sure
Explanation:
Need help asap! Will give brainliest!!!!! (15pt)
Which scenario has been theorized as the possible fate of the universe?
A.
the big chill
B.
the big bang
C.
the big expansion
D.
the big heat
Answer:
Big Chill
Explanation:
Answer:
it's big chill or big freeze
convert to moles:
100.0g Ca3(PO4)2
Answer:
0.322 moles
Explanation:
Given Mass, m = 100 g
The molar mass of Ca₃(PO₄)₂
Ca₃(PO₄)₂ = (3 x 40.08) + (2 x 30.97) + (8 x 16.00)
M = 310.18 g/mol
Let there are n number of moles,
n = given mass/ molar mass
[tex]n=\dfrac{100 }{310.18 }\\\\n=0.322\ mol[/tex]
So, there are 0.322 moles.
What is the second most consume grain in the world?
Answer:
Wheat!
Explanation:
Corn ranks first, Wheat, then Rice!
Please select the word from the list that best fits the definition
growth from seed to plant
Answer:
kay, so u didn't gave the list but I guess I'm right...bcz of some words you wrote below..
yeah,
so your answer is GERMINATION
How can we identify patterns of volcanic eruptions?
A salt with a high melting point can be obtained from reaction between metal and
acid solution. The metal that used in this reaction is iron and the acid solution is
hydrochloric acid.
a. What is the chemical name of salt above?
Iron (II) chloride and hydrogen gas
Chemical name:
FeCl2 (aq) + H2 (g)
When force is fixed, does an increase in mass increase or decrease acceleration?
Consider an element Z that has two naturally occurring isotopes with the following percent abundances: the isotope with a mass number of 19.0 is 55.0% abundant; the isotope with a mass number of 21.0 is 45.0% abundant. What is the average atomic mass for element Z?
Average atomic mass of Z = [mass]
Answer:
Average atomic mass = 19.9 amu
Explanation:
Isotopes can be defined as two or more forms of a chemical element that are made up of equal numbers of protons and electrons but different numbers of neutrons.
Generally, the isotopes of a chemical element have the same chemical properties because of their atomic number but different physical properties due to their atomic weight (mass number).
Given the following data;
Relative abundance of Z-19 = 55%
Relative abundance of Z-21 = 45%
Atomic mass of Z-19 = 19 amu
Atomic mass of Z-21 = 21 amu
To find the average atomic mass;
Average atomic mass = 19 * (55/100) + 21 * (45/100)
Average atomic mass = 19*0.55 + 21*0.45
Average atomic mass = 10.45 + 9.45
Average atomic mass = 19.9 amu
Therefore, the average atomic mass for element Z is 19.9 amu.
1.5 atm is the same pressure as... (1 atm
760 mmHg)
1100 mmHg
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Gas Laws
PressureStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.5 atm
[Solve] mmHg
Step 2: Identify Conversions
1 atm = 760 mmHg
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.5 \ atm(\frac{760 \ mmHg}{1 \ atm})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 1140 \ mmHg[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1140 mmHg ≈ 1100 mmHg
*14.
How many atoms of sulfur are in 0.75 moles of carbon disulfide?
Match the gas sample with each others.
a. has the highest average molecular speed
b. has the lowest average molecular speed
c. has an average molecular speed between the highest and the lowest
1. _________0.564 moles of Ne in a 5.33 L container at a temperature of 308K
2. _________0.658 moles of Ne in a 2.05 L container at a temperature of 426K
3. _________ 0.128 moles of Ne in a 5.69 L container at a temperature of 426K
4. _________0.322 moles Of Ne in a 4.00 L container at a temperature of 398K
Answer:
a. The gas with the highest average molecular speed is the gas option 3.
b, The gas that has the lowest average molecular speed is the gas option 1.
c. The gas with average molecular speed between the highest and the lowest is the gas sample, option 4
Explanation:
From the kinetic theory of gases we have;
[tex]v_{rms} = \sqrt{\dfrac{3\cdot R\cdot T}{m} }[/tex]
Where;
[tex]v_{rms}[/tex] = The root mean square velocity of the gas
T = Temperature of gas in Kelvin
m = Mass of atom or molecule in kilograms
R = The universal gas constant
Therefore, [tex]v_{rms}[/tex] ∝ T and [tex]v_{rms}[/tex] ∝ 1/m
a. Therefore, the gas with the highest average molecular speed has the highest temperature, 'T', and the lowest mass, 'm', therefore, we have;
The gas with the highest average molecular speed is the gas option 3. with only 0.128 moles of Ne in 5.69 L container at a temperature of 426 K
b. The gas with the lowest average molecular speed has the lowest temperature, 'T', and the highest mass, 'm', therefore, we have;
The gas with the lowest average molecular speed is the gas option 1. with only 0.564 moles of Ne in 5.33 L container at a temperature of 308 K
c. The gas with an average molecular speed between the highest and the lowest is the gas with intermediate temperature and mass within the given gas samples
Therefore, the gas with the average molecular speed between the highest and lowest is the gas option 4. with 0.322 moles of Ne in 4.00 L container at a temperature of 398 K