Answer: 54.8 Liters of hydrogen gas can be made at 300 K and 0.970 atm
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text {moles of magnesium }=\frac{52.0g}{24g/mol}=2.16moles[/tex]
The balanced chemical equation is:
[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]
According to stoichiometry:
1 mole of Mg gives = 1 mole of [tex]H_2[/tex]
Thus 2.16 moles of Mg give = [tex]\frac{1}{1}\times 21.6=2.16 moles[/tex] of [tex]H_2[/tex]
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 0.970 atm
V = Volume of gas = ?
n = number of moles = 2.16
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]300K[/tex]
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{2.16mol\times 0.0821Latm/Kmol\times 300K}{0.970atm}=54.8L[/tex]
Thus 54.8 Liters of hydrogen gas can be made at 300 K and 0.970 atm
How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for
5.50 hours?
Answer: 123 g
Explanation: Q =It = nzF. For Ca^2+ z= 2, t = 5.5 x 3600 s and I = 30.0
And F= 96485 As/mol
Amount of moles is n = It /zF = 3.078 mol , multiply with atomic mass 40.08 g/mol
Calculate the molar mass of a sample if a single molecule weighs 2.55 x 10^-23 g.
molar mass= energy x mass= 10 x 2.55 x 10^-23
Avogadro's number (NA) or Avogadro's constant (6.0221 x 10^23). The term "mole" is defined as that one mole of a substance with a molecular (or atomic) mass of one (1), will have a mass of 1 gram.
What is Avogadro's number?The number of molecules in one mole is 6.022 * 10^ 23 numbers. The molecular mass of the molecule is 2.55 x 10^-23
Molar mass can be defined as 'mass per mole.' In other words, molar mass is the sum of the mass of all the atoms found in one mole's worth of a substance. It is expressed in units of grams per mole.
Molar mass is depicted for elements or molecules. In the case of single elements or individual atoms, the molar mass would just be the element's mass expressed in atomic mass units.
Molar mass = 2.55 x 10^-23/ 6.022 * 10^ 23
= 0.423
Therefore, Avogadro's number (NA) or Avogadro's constant (6.0221 x 10^23). The term "mole" is defined as that one mole of a substance with a molecular (or atomic) mass of one (1), will have a mass of 1 gram.
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Slow cooling of magma leads to the formation of large crystals, such as halite and calcite.
Select the correct response:
True
False
One orbit of the earth around the sun equals _____________ miles.
595 million
360 million
5,280
Answer:
it's about 580millon, but the closest you have is 595 million, so pick that one
Answer:
should be 595 !
Explanation:
7. A certain hydrocarbon, CxHy, is burned (reacts with O2 gas) and produces 1.955 g of CO2 for every
1.000 g of H20. What is the empirical formula of this hydrocarbon?
CxHy + (X + y/4) O2 -> xCO2 + y/2 H2O
Answer:
The empirical formula of the hydrocarbon is C₂H₅
Explanation:
The formula for the hydrocarbon is [tex]C_xH_y[/tex]
The mass of CO₂ produced per 1,000 g of H₂O = 1,955 g
The equation for the chemical reaction is given as follows;
[tex]C_xH_y[/tex] + (x + y/4) O₂ → XCO₂ + y/2H₂O
From the given chemical equation, counting the number of atoms on both sides of the equation, we have;
The molar mass of CO₂ = 44.01 g/mol
The molar mass of H₂O = 18.01528 g/mol
The number of moles of H₂O in 1,000 g of H₂O = 1,000 g/(18.01528 g/mol) = 55.5084351 moles
The number of moles of CO₂ in 1,955 g of H₂O = 1,955 g/(44.01 g/mol) = 44.4217223 moles
Therefore, given that X moles of CO₂ is produced alongside Y/2 moles of H₂O. we have;
X = 44.4217223, Y/2 = 55.5084351
∴ Y = 2 × 55.5084351 = 111.0168702
The ratio of X to Y = X/Y = 44.4217223/111.0168702 = 0.40013488238
∴ The ratio of X to Y = X/Y ≈ 0.4 = 4/10
X/Y ≈ 4/10
The empirical formula is the representation of molecular formula in the smallest whole number ratio of the elements of the molecules
Therefore, when X = 4, Y = 10, from which we have the smallest ratio as;
When X = 2, Y = 5
The empirical formula of the hydrocarbon is therefore, [tex]C_xH_y[/tex] = C₂H₅
The given chemical equation becomes;
C₂H₅ + (2 + 5/4) O₂ → 2CO₂ + 5/2H₂O
C₂H₅ + 3.25 O₂ → 2CO₂ + 2.5 H₂O
We then have;
4C₂H₅ + 13 O₂ → 8CO₂ + 10 H₂O
The empirical formula of the hydrocarbon, [tex]C_xH_y[/tex] = C₂H₅.
It takes 2 g of chlorine to sanitize 1,000,000g of water. How much chlorine will it take to sanitize a 40,000-gallon pool? ( 1 gallon =3.7L; the density of water is 1.0g/ml ) Show your work
Answer:
0.1g (Gallon) of chlorine
Explanation:
Formula
1 gallon = 3.7L; the density of water is 1.0g/ml
Given
2g (gallon) of chlorine to sanitize = 1,000,000g (gallon) of water
Solve
If 2g (gallon) chlorine = 1,000,000g (gallon)
∴, ? chlorine = 40,000
The First step; set up an equation
1000000/2 = 40000/?
The Next step; divide 1 million to 2
1000000 ÷ 2 = 500000
Then, divide the result by 40000
40000 ÷ 500000 = 0.08
In the nearest unit that is 0.1
Therefore, it will take 0.1g (gallon) of chlorine to sanitize a 40,000-gallon pool.
Answer:
296
Explanation:
1 gallon = 3.7 L
40,000 gallon
= 40,000 × 3.7
= 148,000 L
1 g = 1 / 1000 L
1,000,000 g
= 1,000,000 / 1000
= 1,000 L
Let x be the amount of chlorine that will it take to sanitize a 40,000-gallon pool.
2 : 1,000 : : x : 148,000
2 / 1,000 = x / 148,000
x × 1,000 = 2 × 148,000
x = ( 2 × 148,000 ) / 1,000
= 2 × 148
x = 296 g
Therefore,
296 g of chlorine will it take to sanitize a 40,000-gallon pool.
( I solved using maths )
Increase the coefficient for NH3. Look at
the balance labeled "H" (for hydrogen).
Why are there now 3 hydrogen atoms on
the right side of the balance but 0 on the
left side?
Answer:
I don't know please you tell me just joking
Calculate the number of water (H2O) molecules produced from the decomposition of 75.50 grams of Iron (III) hydroxide (Fe(OH)3).
Answer: [tex]6.38\times 10^{23}[/tex] molecules of water are produced.
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Fe(OH)_3=\frac{75.50g}{106.8g/mol}=0.707moles[/tex]
The balanced chemical reaction is:
[tex]2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O[/tex]
According to stoichiometry :
2 moles of [tex]Fe_2O_3[/tex] produce = 3 moles of [tex]H_2O[/tex]
Thus 0.707 moles of [tex]Fe_2O_3[/tex] will produce=[tex]\frac{3}{2}\times 0.707=1.06moles[/tex] of [tex]H_2O[/tex]
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Thus 1.06 moles of [tex]H_2O[/tex] contains = [tex]\frac{6.023\times 10^{23}}{1}\times 1.06=6.38\times 10^{23}[/tex] molecules
Answer:
6.381 x 10^23
Explanation:
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
OV
Na
Mg
Se
Save and Frit
Answer:
Na
Explanation:
Sodium
why is the volume of hydrogen is doubled the volume of oxygen in electrolysis of water?
Answer:
The volume of the hydrogen produced is always twice the volume of the oxygen produced, because water contains two atoms of hydrogen for each atom of oxygen.
Which salt is most soluble at 90C?
Explanation:
sodium nitrate is most soluble at 90C.
Solubility is the ability to get dissolved. The salt of sodium is the most soluble salt at 90 degrees.
What is solubility?Solubility is the compound's or substance's ability to get dissolved in the solvent for the formation of the solution. It depends on several factors like hydration energy, temperature, pressure, and lattice energy.
The size of sodium is small, it has less lattice energy compared to the hydration energy and can get readily dissolved as it can create a sphere around other ions to form the solution.
Therefore, sodium salt is the most soluble at 90 degrees celsius.
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Describe the energy in nuclear fuel and the way in which it’s converted to electrical energy. Write 50 to 100 words.
Explanation:
You will have to rewrite this in your own words please. Download the app Paraphrase and also download Plagiarism Checker. Go on Paraphrase first and write it out then go to Plagiarism second and it'll tell you if you still need to reword it.
Answer:
A nuclear reactor produces electricity in much the same way other power plants do. The chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity.
Explanation:
Nuclear energy originates from the splitting of uranium atoms a process called fission. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel. The uranium fuel is formed into ceramic pellets. Inside each uranium fuel pellet, there are millions of uranium nuclei. When these nuclei are split, a huge amount of energy is released. Some of this energy is from radiation, but the biggest source is kinetic energy. This is the energy that produces heat inside a reactor. The heat produced during nuclear fission in the reactor core is used to boil water into steam, which turns the blades of a steam turbine. As the turbine blades turn, they drive generators that make electricity. Nuclear plants cool the steam back into water in a separate structure at the power plant called a cooling tower, or they use water from ponds, rivers, or the ocean. The cooled water is then reused to produce steam.
Write the expressions for the equilibrium constants of the reactions below.
a. N2 + 3H2 ⇌ 2NH3
b. Br2 + H2 ⇌ 2HBr
c. CO + H2O ⇌ H2 + CO2
In general, for a given chemical reaction in equilibrium
[tex]aA + bB \rightleftharpoons cC + dD[/tex]
the equilibrium constant, Keq, will be
[tex]K_{eq}=\frac{\mathrm{[C]^c}[D]^d}{\mathrm{[A]^a[B]^b}}.[/tex]
Usually, only aqueous and gaseous species are included in the equilibrium constant; the concentration of any pure solid or liquid is omitted. While the states of the reactants and products in the reactions for this problem aren't given, these three particular reactions all happen to be ones where they can (and, in fact, do) occur where all the species are in the gaseous state. So, all the reactants and product(s) are included in the equilibrium constants below, but this will not always be the case.
a.
[tex]K_{eq}=\frac{\mathrm{[NH_3]^2}}{\mathrm{[N_2][H_2]^3}}[/tex]
b.
[tex]K_{eq}=\frac{\mathrm{[HBr]^2}}{\mathrm{[Br][H_2]}}[/tex]
c.
[tex]K_{eq}=\frac{\mathrm{[H_2][CO_2}]}{\mathrm{[CO][H_2O]}}[/tex]
The equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.
What is equilibrium constant?The term equilibrium constant has to do with the value that shows the extent to which reactants are converted into products.
The following are the expressions for the equillibrium constant of each reaction;
[tex]K = [NH3]^2/[N2] [H2]^3[/tex][tex]K = [HBr]^2/[Br2] [H2][/tex][tex]K= [H2] [CO2]/[CO] [H2O][/tex]Learn more about equilibrium constant:https://brainly.com/question/10038290
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Se valoró una alícuota de 10ml de HCl con NaOH AL 0.0548M de la cual se gastó 17.9ml. La concentración molar del ácido es:
Answer:
se lonh hion ffyuk jlngvn
Adiabatic process is a process in which _ is constant (a) temperature (b)volume (c)pressure (d) heat
Answer: Adiabatic process is a process in which heat is constant
Explanation:
The processes in which temperature remains constant is called isothermal process.
The process in which Volume remains constant is called isochoric process.
The process in which pressure remains constant is called isobaric process.
The process in which no heat is gained or lost by the system, Hence heat remains constant is called as adiabatic process.
Thus option d) heat is correct
Given the reaction: 4 NH3(g) + 5 O2(g) → 4 NO (g) + 6 H2O When 1.20 mole of ammonia reacts, how many moles of water are produced?
Answer:
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
Explanation:
The balanced reaction is:
4 NH₃(g) + 5 O₂(g) → 4 NO (g) + 6 H₂O
By stoichiometry of the reaction, the following amounts of moles participate in the reaction:
NH₃: 4 moles O₂: 5 molesNO: 4 molesH₂O: 6 molesThen you can apply the following rule of three: if by stoichiometry 4 moles of ammonia produce 6 moles of water, 1.2 moles of ammonia will produce how many moles of water?
[tex]moles of water=\frac{1.2 moles of ammonia*6 moles of water}{4 moles of ammonia}[/tex]
moles of water= 1.8 moles
When 1.20 mole of ammonia reacts, 1.8 moles of water are produced.
For the night yet balanced equation, No + CuCl2 —> Cu + NiCl3, if you started with 12.00 g of nickel and 42.00 g of CuCl2, how much Copper would you expect to produce Perdue
Answer:
19.45g of Cu are expect to be produced
Explanation:
Based on the reaction:
2Ni + 3CuCl2 → 3Cu + 2NiCl3
2 moles of Ni react with 3 moles of CuCl2 to produce 3 moles of Cu
To solve this question we must find the moles of each reactant in order to find the limiting reactant. With the limiting reactant we can find the moles of Cu produced and the mass as follows:
Moles Ni -Molar mass: 58.6934g/mol-
12.00g * (1mol / 58.6934g) = 0.204 moles Ni
Moles CuCl2 -Molar mass: 134.45g/mol-
42.00g * (1mol / 134.45g) = 0.312 moles CuCl2
For a complete reaction of 0.204 moles of Ni are required:
0.204 moles Ni * (3 moles CuCl2 / 2 moles Ni) = 0.306 moles of CuCl2
As there are 0.312 moles, CuCl2 is the excess reactant and Ni is limiting reactant.
Moles Cu:
0.204 moles Ni * (3moles Cu / 2 moles Ni) = 0.306 moles of Cu are produced
Mass Cu:
0.306 moles of Cu * (63.546g / mol) =
19.45g of Cu are expect to be producedWhat connects bones and muscles together?
Ligaments
Cartilage
Glue
Tendons
Answer: Tendons.
Explanation: A tendon is a fibrous connective tissue which attaches muscle to bone.
The evidence of chemical changes with an example of each (include all 5)
Answer:
??????????
Explanation:
Can you help me out with gravity study!?
Awnser 4 questions only please!
Answer:
F
T
F
T
Explanation:
i hope these are right
What is the molarity of a solution in which 175.8
grams of NaCl is dissolved in 1.5 L of water?
Which step(s) of the greenhouse effect are being most affected by the increases in greenhouse gases, leading to an increase in heat? 1. Solar radiation enters the Earth system and is reflected and absorbed. 2. Absorbed energy is released into the atmosphere as heat. 3. Heat is absorbed by the atmosphere. 4. The atmosphere re-releases heat, warming Earth's surface and lower atmosphere. 1 and 2 2, 3 and 4 1, 2, and 3 3 and 4
Answer:
Answers of the greenhouse effect 1 ,3 and 4
What will the nervous system feedback do when the human body's temperature drops just below its normal range? Plssss help
Answer:
Homeostasis
Explanation:
The blood vessels constrict and you start to shiver, that shivering generates heat to warm the body to help to body temperature go back to normal. Homeostasis is the condition of keeping your body at a normal condition.
Why do North and South Pole have different winter times?
The two poles have different location.
North Pole is found in the Western Hemisphere.
The tilt of the Earth towards the Sun changes throughout the year.
North Pole is found in the Northern Hemisphere.
Answer:
Explanation:
Both the Arctic (North Pole) and the Antarctic (South Pole) are cold because they don't get any direct sunlight. The Sun is always low on the horizon, even in the middle of summer. In winter, the Sun is so far below the horizon that it doesn't come up at all for months at a time.
Answer:
The tilt of the Earth towards the Sun changes throughout the year.
Explanation
Describe how to
separate a mixture of
fillings, sulphur and salt.
Answer:
firstly for separating fillings we should use
magnet for separating it, and we left with sulphur and salt so for this we will use water
when we add water then salt get dissolve in it and we can easily take out sulphur again by evaporation we will obtain salt
hope it helps
Which of the following represents an increase in kinetic energy?
A. Cooling steam from 165°C to 100°C
B. Melting 45g of ice
C. Condensing 60g of steam
D. Heating ice from -50°C to 0°C
Answer:
C
Explanation:
9)
How many grams are in 4.5 moles of sodium hydroxide (NaOH)?
Answer:
179.986995
Explanation:
1 mole is equal to 39.99711 grams.
so muitiply 39.99711 by 4.5 and get 179.986995
What is the pH of a 0.30 M solution of Ca(OH)2?
Explanation:
30 to the second power
Some students were investigating the speed of a toy car they built. They performed two trials and recorded the data in the table below. What was the average speed of the toy car during the two trials to the nearest tenth of m/s
Answer:
It's 3.0
Hope this helps
Create the Equation: How many grams of Aluminum Chloride would be made from 42.7 L of Chlorine gas at STP reacting with 50.0 g of Aluminum?
Answer: 169.3 g of [tex]AlCl_3[/tex] will be produced
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
moles of [tex]Al[/tex]
[tex]\text{Number of moles}=\frac{50.0g}{27g/mol}=1.85moles[/tex]
moles of [tex]Cl_2[/tex]
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 1 atm (STP)
V = Volume of gas = 42.7 L
n = number of moles = ?
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]273K[/tex] (at STP)
[tex]n=\frac{PV}{RT}[/tex]
[tex]n=\frac{1atm\times 42.7L}{0.0820 L atm/K mol\times 273K}=1.90moles[/tex]
[tex]2Al+3Cl_2\rightarrow 2AlCl_3[/tex]
According to stoichiometry:
3 moles of [tex]Cl_2[/tex] reacts with = 2 moles of aluminium
Thus 1.90 moles of [tex]Cl_2[/tex]reacts with= [tex]\frac{2}{3}\times 1.90=1.27[/tex] moles of aluminium
Thus [tex]Cl_2[/tex] is the limiting reagent as it limits the formation of product.
As 3 moles of [tex]Cl_2[/tex] give = 2 moles of [tex]AlCl_3[/tex]
Thus 1.90 moles of [tex]Cl_2[/tex] give =[tex]\frac{2}{3}\times 1.90=1.27moles[/tex] of [tex]AlCl_3[/tex]
Mass of [tex]AlCl_3=moles\times {\text {Molar mass}}=1.27moles\times 133.34g/mol=169.3g[/tex]
Thus 169.3 g of [tex]AlCl_3[/tex] will be produced from the given masses of both reactants.