The question requires us to calculate the mass of reactant (O2) necessary to obtain 15 L of the product (NO2) under the conditions given.
The following information was provided by the question:
- Balanced chemical reaction: 2 NO(g) + O2(g) → 2 NO2(g)
- Final volume of NO2: 15 L
- Pressure: P = 752 mmHg
- Temperature: 344 K
- Gas constant: R = 0.08206 L⋅atm/mol⋅K
To solve this question, we'll need to go through the following steps:
1) calculate the number of moles that corresponds to 15 L of NO2, considering the temperature and pressure given;
2) use the stoichiometric relation to calculate the necessary amount of O2 to produce the previously calculated number of moles of NO2
3) use the molar mass of O2 and the value calculated on step 2 to obtain the necessary mass of O2
Next, we'll solve the problem following these steps:
1) To calculate the number of moles of NO2, we'll use the following equation:
[tex]P\times V=n\times R\times T[/tex]where P is the pressure, V is the volume of gas, n is the number of moles, R is the constant of gases and T is the temperature.
If we rearrange the equation to calculate the number of moles, we'll have:
[tex]n=\frac{P\times V}{R\times T}[/tex]Note that the problem provided all necessary information for this calculation, but the pressure given (752 mmHg) needs to be converted into atm to match the constant provided.
To do that, we'll use the following:
1 atm = 760 mmHg
Thus, we need to divide the value provided by 760:
[tex]P=752\text{ mmHg}\times\frac{1\text{ atm}}{760\text{ mmHg}}=0.989\text{ atm}[/tex]Now, we can apply the values of pressure, volume and temperature, as well as the constant provided, to the equation written above:
[tex]n=\frac{(0.989\text{ atm)}\times(15\text{ L)}}{(0.08206\text{ L.atm/mol.K)}\times(344\text{ K)}}=0.525\text{ mol}[/tex]So far, we have that the volume of NO2 to be produced (15 L) corresponds to 0.525 mol under the conditions of pressure and temperature provided.
2) Next, we use the chemical reaction to calculate the number of moles of O2 required to produce 0.525 mol of NO2.
From the reaction, we have that 1 mol of O2 leads to 2 mol of NO2. Then, we use this to calculate how many moles of O2 would produce 0.525 moles of NO2:
1 mol O2 --------------- 2 mol NO2
x -------------------------- 0.525 mol NO2
Solving for x, we have:
[tex]x=\frac{(1\text{ mol O2)}\times(0.525\text{ mol NO2)}}{(2\text{ mol NO2)}}=0.263\text{ mol O2}[/tex]Now, we know that 0.263 moles of O2 are necessary to produce 15 L of NO2
3) The last step is calculate the mass of O2 that corresponds to 0.263 moles of this compound.
To do this, we need the molar mass of O2. Since the atomic mass of oxygen is 15.99 u, the molar mass of O2 is:
molar mass O2 = (2 * 15.99) = 31.98 g/mol
With this information, we can calculate the mass of 0.263 moles of O2:
1 mol O2 -------------------- 31.98 g O2
0.263 mol O2 ------------ y
Solving for y, we have:
[tex]y=\frac{(0.263\text{ mol O2)}\times(31.98\text{ g O2)}}{(1\text{ mol O2)}}=8.41\text{ g O2}[/tex]Therefore, the mass of O2 necessary to produce 15 L of NO2 under the conditions given is 8.41 g.
when the solute particles mixed with water what do they become
Answer:
the water becomes solvent, and the mixture becomes the solution.
Explanation:
Answer:
a solution
Explanation:
solute and solvent(water) put together would produce a solution
A reaction between liquid reactants takes place at 28.0 degree celcuis in a sealed, evacuated vessel with a measured volume of 15.0L. Measurements show that the reaction produced 10.0g of dinitrogen difluoride gas.
Calculate the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction. You may ignore the volume of the liquid reactants. Round your answer to 2 significant digits.
The pressure of N2F2 will be 1.64 atm.
Given data:
Mass of N2F2 = 66 grams
Molar mass of N2F2 = 66 g/mol
Temperature = 28°C = 273 +28 = 301 Kelvin
volume = 15 L.
Gas constant = 0.08206 L*atm/K* mol
Number of moles can be determined by using the formula:
Number of moles = mass of N2F2 / Molar mass of N2F2
Number of moles = 66 g/ 66 g/mol = 1 moles.
Volume can be determined by using the formula:
P*V = n×R×T
where, P is pressure, V is volume, T is temperature.
P = (n×R×T)/ V
P = 1 * 0.08206 * 301 )/15 = 1.6466 atm.
The pressure of the sulfur tetrafluoride gas is 1.64 atm.
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List two components of rocket fuel?
A component that many space agencies use is liquid hydrogen, which can be abbreviated as LH2.
And another fuel very used in rockets is kerosene which is a hydrocarbons mixture of other compounds that fuel.
Answer:
Most liquid chemical rockets use two separate propellants: a fuel and an oxidizer. Typical fuels include kerosene, alcohol, hydrazine and its derivatives, and liquid hydrogen. Many others have been tested and used. Oxidizers include nitric acid, nitrogen tetroxide, liquid oxygen, and liquid fluorine.
Explanation:
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Explain an element Magnesium would need to react with in order to attain a subscript of 3?
The chemical element which magnesium would combine with in order to attain a subscript of 3 is nitrogen which result in the formation magnesium nitride ( Mg₃N₂ )
How magnesium attains a subscript of 3Magnesium is a metallic element which belongs to group 2 and and has a valence electron of 2. This means that in an electrovalent combination, magnesium loses 2 valence electrons to nitrogen to become Mg2+ ion. To complete this bonding, nitrogen which has 5 valence electrons accepts 3 of Mg2+ ions in addition with with its two N3− ions to form magnesium nitride. When this happens, magnesium then attains a subscript of 3.
Magnesium nitride is an electovalent or ionic compound and the bond which exist in it is Ionic bond. It is used in the synthesis of ceramic substances.
So therefore, we can confirm from above that when magnesium reacts with nitrogen, it attains a subscript of 3.
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Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.
What are chemical elements?Chemical elements are defined as a type of atom, including the pure substance made entirely of that type, with a specific number of protons in its nucleus.
Magnesium is a metallic element with a valence electron number of 2, and it is a member of group 2. This indicates that magnesium loses two valence electrons to nitrogen in an electrovalent combination to form the Mg2+ ion. Nitrogen, which has five valence electrons, accepts three Mg2+ ions in addition to its two N3 ions to complete this bonding and create magnesium nitride. Magnesium then achieves a subscript of 3 when this occurs.
Thus, Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.
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In the following reaction, What quantity in moles of CH₃OH are required to give off 1501 kJ of heat? 2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ
Taking into account the definition of enthalpy of a chemical reaction, 2.345 moles of CH₃OH are required to give off 1501 kJ of heat
Definition of enthalpy of a chemical reactionThe enthalpy of a chemical reaction as the heat absorbed or released in a chemical reaction when chemicals are transformed into a chemical reaction at constant pressure.
The enthalpy is an extensive property, that is, it depends on the amount of matter present.
Amount of moles of CH₃OHIn this case, the balanced reaction is:
2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g)
and the enthalpy reaction ∆H° has a value of -1280 kJ/mol.
This equation indicates that when 2 moles of CH₃OH reacts with 3 moles of O₂, 1280 kJ of heat is released.
If it is required to give off 1501 kJ of heat, you can apply the following rule of three: If 1280 kJ of heat is released by 2 moles of CH₃OH, 1501 kJ of heat is released by how many moles of CH₃OH?
amount of moles= (1501 kJ× 2 moles of CH₃OH)÷ 1280 kJ
amount of moles= 2.345 moles of CH₃OH
In summary, the amount of moles required are 2.345 moles.
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Some hydrogen and iodine are mixed at 229 degrees Celsius in a 1.00L container. When equilibrium is established, the following concentrations are present: [HI] = 0.490 M, [H2] = 0.080 M, [I2] = 0.060 M. If an additional 0.300 mol of HI is then added, what concentration will be present when the new equilibrium is established?
The concertation of the HI that would be present in the new equilibrium position is 0.15 M.
What is the new equilibrium position?We have to first obtain the equilibrium constant that we have under the initial conditions and then we have; H2 + I2 ------> 2HI
K = [HI]^2/[H2] [I2]
K = (0.490)^2/(0.080) (0.060)
K = 0.2401/(0.080) (0.060)
K = 50
Again;
H2 + I2 ------> 2HI
Initial 0.080 0.060 0.060
concentration +x +x -2x
Equilibrium 0.080 + x 0.060 + x 0.490 - 2x
50 = (0.490 - 2x)^2/( 0.080 + x) (0.060 + x)
Working through the quadratic we have;
46x^2 + 10.2 x - 0.38 = 0
x = 0.32 M
In each case we now have;
H2 = 0.080 + 0.32 = 0.4 M
[I2] = 0.060 + 0.32 = 0.38 M
[HI] = 0.790 - 2( 0.32 ) = 0.15 M
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Will the artificial cell become more flaccid, more turgid, or stay the same?
Options:
A) The artificial cell will burst.
B) The artificial cell will stay the same.
C) The artificial cell will become more flaccid.
D) The artificial cell will become more turgid.
The correct answerwer is option D.
D)The artificial cell will become more turgid.
What is a cell?
The cell is the basic building block of all living things. The human body contains many cells and they provide structure for the body. They take in nutrients from the food and convert them to energy for the body. they also carry out specialized functions.
Artificial cells are engineered particles that look like natural biological cells. example proteins, genes, enzymes, etc
Flaccid cells are shrunken cells while turgid cells are stretched due to the absorption of water.
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Which type of element is shown in green boxes
Calcium like to lose how many electron/s to form an ion?Group of answer choices123cannot determine
Answer: the best option to answer the question is the second one (or letter B), "2"
Explanation:
The question requires us to identify how many electrons a calcium (Ca) atom would lose to form an ion.
We can analyze the electron configuration of Ca to understand how many electrons it would lose.
The atomic number of Ca is 20, thus its electron configuration is as it follows:
[tex]1s^2\text{ 2}s^2\text{ 2}p^6\text{ 3}s^2\text{ 3}p^6\text{ 4}s^2[/tex]From the electron configuration, we can see that Ca presents 2 electrons in its valence shell (4s2). To achieve stability, it is easier for Ca to lose these two electrons and form a Ca2+ ion.
Therefore, the best option to answer the question is the second one (or letter B), "2".
Which subatomic particle is positively charged?ProtonNeutronElectronNone
Explanation:
A proton is a positively charged subatomic particle.
A neutron is a neutrally charged subatomic particle.
An electron is a negatively charged subatomic particle.
Answer:
The first option is correct.
2. Oxygen gas is collected at a pressure of 123 kPa in a container which has a volumeof 10.0 L. What temperature must be maintained on 0.654 moles of this gas in order tomaintain this pressure? Express the temperature in Kelvin.
Answer
T = 226.21 K
Explanation
Given:
Pressure = 123 kPa
Volume = 10.0 L
number of moles = 0.654 moles
We know R = 8.314 L kPa/mol k.
Required: Temperature
Solution:
Pv = nRT
T = PV/nR
T = (123 kPa x 10.0 L)/(0.654 mol x 8.314 L kPa/mol k)
T = 226.21 K
1. How would an element be classified?a. homogeneous mixtureb. pure substancec. solutiond. heterogeneous mixture
Hello
To solve this question, we should understand that an element is is the base form in which a particule exit. However, it can either be in a molecule, atom or in a compound. Elements are pure substance which form up the molecule, atom or compounds. An element can said to be an identity of a substance. Elements are generally classified using the periodic table into metals, non-metals, metalliods.
In this question, the most possibe defination is that an element is a pure substance
A homogenous mixture is a mixture that is said to have one phase of substance throughout. I.e the comprising substance are all in a single phase.
A solution is the mixture of a solute that is completely dissolved in a solvent.
A heterogeneous mixture is a solution that the substance are not in a single phase.
The answer to this question is option B
If a volcano erupts and ejects 12.5 moles of sulfur into the atmosphere how many atoms of sulfur is this
In this question, we have to find the number of atoms in 12.5 moles of Sulfur, and the way to do it is by using the Avogadro's number, which is 6.02*10^23 atoms, this value represents how many atoms we have in 1 single mol of any element. Therefore in 12.5 moles we will have:
1 mol = 6.02*10^23 atoms
12.5 moles = x atoms
x = 7.52*10^24 atoms of Sulfur in 12.5 moles
There are 4 moles of methane burned to produce how many moles of water? CH4+2O2=CO2+2H2O
ANSWER
8 moles of water
EXPLANATION
The major products formed when an organic compound undergo combustion reaction are water and carbon dioxide
Below is the combustion formula
[tex]\text{ C}_xH_y\text{ + x + }\frac{y}{4}O_2\text{ }\rightarrow\text{ xCO}_2\text{ + }\frac{y}{2}H_2O[/tex]In the question above, 4 moles of methane reacts with oxygen
[tex]\begin{gathered} \text{ 4CH}_4\text{ + 4+}\frac{16}{4}O_2\text{ }\rightarrow\text{ 4CO}_2\text{ + }\frac{16}{2}H_2O \\ \\ \text{ 4CH}_{4(g)}\text{ + 8O}_{2(g)}\text{ }\rightarrow\text{ 4CO}_{2(g)}\text{ + 8H}_2O(l) \end{gathered}[/tex]Therefore, 4 moles of methane will give 8 moles of water
Which type of radiation would you consider ionizing radiation?MicrowavesVisible lightSound wavesGamma rays
Ionization radiation is a type of energy with such a high value that it is capable of removing electrons from atoms and converting them into ions. This type of energy is extremely dangerous. The types of energy that fall into this category are X-rays and gamma rays.
So, the answer will be Gamma rays
What is the final concentration when 288mL of water is added to 239mL of a 0.274M solution?
Answer:
0.124 M.
Explanation:
What is given?
Volume 1 (V1) = 239 mL,
Concentration 1 (C1) = 0.274 M,
Volume 2 (V2) = 239 mL + 288 mL = 527 mL.
What do we need? Concentration 2 (C2).
Step-by-step solution:
To solve this problem, we have to use the following formula:
[tex]C_1V_1=C_2V_2.[/tex]Where the initial concentration (C) and volume (V) are represented with subindex 1, and the final concentration and volume are represented with subindex 2.
The problem is telling us that we are adding 288 mL of water to 239 mL, so the final volume is the sum of these two volumes, i.e., 527 mL.
As we want to find the final concentration, C2, we just have to solve for this unknown value and replace the values that we have, like this:
[tex]\begin{gathered} C_2=\frac{C_1V_1}{V_2}, \\ \\ C_2=\frac{0.274\text{ M}\cdot239\text{ mL}}{527\text{ mL}}, \\ \\ C_2=0.124\text{ M.} \end{gathered}[/tex]The answer would be that the final concentration of the solution is 0.124 M.
What is neutralization reaction? Use an example to describe the components of neutralization reaction
1) Neutralization reaction.
In this type of reaction an acid and a base react to form a salt and water. In the course of the reaction H+ and OH- are produced. Afterward, they combine to produce water.
2) Example.
Acid: HCl
Base: NaOH
Salt: NaCl
[tex]\text{HCl}+\text{NaOH}\rightarrow NaCl+H_2O[/tex]can someone please help me with 28 A!
Answer: The answer for 28 A is [tex][He]2s^2 2p^2[/tex]
28 B is [tex]1s^2 2s^2 2p^1[/tex]
a gas has a volume of 103.4 L at 27.5 atm. what will it’s volume be if the pressure is changed to 69.3 atm
In this question, we have a gas presenting volume and pressure, and the gas law that we can use to calculate it is Boyle's gas Law, which perfectly correlates both pressure and volume, the formula is:
P1V1 = P2V2
We have:
P1 = 27.5 atm
V1 = 103.4 L
P2 = 69.3 atm
V2 = ?
Now we add these values into the formula:
27.5 * 103.4 = 69.3 * V2
V2 = 41.0 L
Isopropyl alcohol is mixed with water to produce 32.0% (v/v) alcohol solution.How many milliliters of each component are present in 655 mL of this solution? Assume the volumes are additive.Alcohol: _____________ mL Water: __________ mL
Isopropyl alcohol + water = Solution
Solute = Isopropyl alcohol
Solvent = water
% V/V = mL of solute / 100 ml of solution
Now we have 655 mL of solution.
32.0 % V/V means 32 mL of Isopropyl alcohol dissolved in 100 mL of solution.
So,
32 mL Isopropyl alcohol ------------------- 100 mL Solution
x ------------------- 655 mL Solution
x represents the volume of Isopropyl alcohol in 655 mL of solution
[tex]x\text{ = }\frac{655\text{ mL solution x 32 mL }Isopropylalcohol\text{ }}{100\text{ mL solution}}=\text{ 209.6 mL of }Isopropylalcohol[/tex]Now
Alcohol: 209.6 mL
Water: 655 mL (solution = Alcohol + Water) - 209.6 mL (alcohol) = 445.4 mL of water
One day in lab, while adding a gnarled root to a dark liquid bubbling in an iron cauldron, your friend Leila (an expert chemist) says this:
"Group 1A metal hydrides react with water to produce hydroxides and hydrogen gas."
Using Leila's statement, and what you already know about chemistry, predict the products of the following reaction.
Be sure your chemical equation is balanced!
KH(s)+ H2O(l)=
The balanced equation of the reaction of the metal hydride, KH, and water is given below:
KH (s) + H₂O(l) ---> KOH + H₂ (g) What are metal hydrides?Metal hydrides are compounds that are composed of a reactive metal chemically combined with hydrogen.
The hydrogen atom is less electropositive than the metal and will accept electrons from the metal to form the negative hydride ion.
For example, Group 1A metal hydrides react with water to produce hydroxides and hydrogen gas.
Considering the above property, the given reaction will be:
KH (s) + H₂O(l) ---> KOH + H₂ (g)
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what is the volume (in L) in a cylinder filled with 23.0 g of N2 gas at a temperature of 65 C and a pressure of 2.37 atm?
The volume of the cylinder filled with 23.0 g of N₂ gas at a temperature of 65 °C and a pressure of 2.37 atm is 9.6 L
Given that,
Mass of the nitrogen gas in the cylinder (m) = 23 g
Temperature (T) = 65 ℃ = 65 + 273 = 338 K
Pressure (P) = 2.37 atm
R (gas constant) = 0.082057338 L.atm.K⁻¹.mol⁻¹
In Ideal gas law or general gas equation,
PV = nRT
Number of moles in nitrogen (n) = Given mass (m) of nitrogen/ Molar mass of nitrogen
Given mass (m) = 23 g
Molar mass of Nitrogen = 28 g/mol
Number of moles of nitrogen (n) = 23 / 28 = 0.82 moles of nitrogen
PV = nRT
2.37 * V = 0.82 * 0.0821 * 338
2.37 * V = 22.75
V = 22.75 / 2.37
V = 9.6 L
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Write the correct formula for the following compound:
zinc phosphate
The correct formula of zinc phosphate is Zn₃(PO₄)₂.
What is chemical formula?Chemical formula is a notation indicating the number of atoms of each element present in a compound.
The chemical or molecular formula shows the type of atoms of an element in a chemical compound and the number of each atoms in the element.
Zinc phosphate is a compound that possess the following elements:
Zinc (Zn)Phosphorus (P)Oxygen (O)This means that the chemical formula of zinc phosphate will show the number of atoms of zinc, phosphorus and oxygen present in the compound.
Therefore, this means that the chemical formula of the compound is Zn₃(PO₄)₂.
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Select the answer that correctly describes the masses the subatomic particles from lightest to having.
1) Subatomic particles. Atoms are made up of smaller parts called subatomic particles. Proton, neutron, and electron are some of them.
Electron: 9.11*10^-31 kg.
Proton: 1.672 18*10^-27 kg.
Neutron: 1.674 93*10^27 kg.
The lightest subatomic particle is the electron, then comes the protons, and finally the electron.
Terrance found a small hair on the victim’s shirt. What type of evidence does this BEST represent?
A.
trace evidence
B.
biological evidence
C.
ammunitions evidence
D.
impression evidence
Answer:
Biological evidence, since it was a hair, which forms part of the human
Using 0.082 as your R value, what mass of NaN3 is required to produce 10L of N2 gas, at 273K and 1.5atm. Show all your work completely.Use the following formula to guide your work: 2NaN3 -> 2Na + 3 N2
To solve this question, we need to use the Clapeyron formula.
Clapeyron's formula is a mathematical expression that relates quantities such as pressure (P), volume (V), temperature (T) and the number of particles (n) that make up an ideal gas.
The formula is: PV = nRT
First, let's discover the number in moles of N2. We have:
P = 1.5 atm
V = 10 L
n = ???
R = 0.082 atm.L/mol.k
T = 273 K
1.5 x 10 = n x 0.082 x 273
15 = n x 22.386
n = 15/22.386
n = 0.67 moles
As we can see in the chemical reaction equation, the ratio between NaN3 and N2 is 2:3.
So:
2 mol of NaN3 --- 3 mol of N2
x mol of NaN2 --- 0.67 moles
3x = 2 x 0.67
x = 0.45 moles of NaN3
Now we transform this value into grams, using NaN3 formula mass, which is 65 g/mol:
65 g ---- 1 mol
x g ---- 0.45 mol
x = 29 g
Answer: 29 g of NaN3
Assuming that each double-displacement reaction occurs, predict the products and write each balanced chemical equation.
a.
Sn(OH)2 + FeBry -*?
b. CsNO3 + KCI -* ?
The products of the double displacement reactions are given in the equations of the reaction below:
a. 3 Sn(OH)₂ (aq) + 2 FeBr₃ (aq) ---> 3 SnBr₂ (aq) + 2 Fe(OH)₃ (s)
Iron (iii) hydroxide is obtained as a precipitate
b. CsNO₃ (aq) + KCI (aq) ---> CsCl (aq) + KNO₃ (aq)
No double displacement reaction occurs as both products are soluble.
What are double displacement reactions?Double displacement reactions are reactions in which there is an exchange of radicals by two compounds when solutions of the compounds are added together.
In a double displacement reaction, an insoluble precipitate is obtained since one of the products of the double displacement reaction is insoluble in aqueous solutions.
The products of the double displacement reactions are given in the equations of the reaction below:
a. Reaction between Sn(OH)₂ and FeBr₃
3 Sn(OH)₂ (aq) + 2 FeBr₃ (aq) ---> 3 SnBr₂ (aq) + 2 Fe(OH)₃ (s)
Iron (iii) hydroxide is obtained as a precipitate
b. Reaction between CsNO₃ and KCI
CsNO₃ (aq) + KCI (aq) ---> CsCl (aq) + KNO₃ (aq)
No double displacement reaction occurs as both products are soluble.
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3. If you need to produce 85 g of CO2, how many grams of: (these are 3 problems starting with thea. C3H8, do you need?same amount:b. O2, do you need?c. H2O will also be made?
1) First let's write the equation. It is a combustion reaction, so:
C₃H₈ + O₂ ---> CO₂ + H₂O
and balance the equation (same number of atoms of each element on both sides of the equation):
C₃H₈ + 5 O₂ ---> 3 CO₂ + 4 H₂O
Reactant side:
C - 3
H - 8
O - 10
Product side:
C - 3
O - 10
H - 8
2) Now let's transform 85 grams of CO₂ into mole. For this, we use the following equation:
mole = mass/molar mass
Molar mass of CO₂ is: (1×12) + (2×16) = 44 g/mol
mole = 85/44
mole = 1.9 mol of CO₂
3) Now we use the proportion of the balanced equation:
1 mol of C₃H₈ ---- 3 mol of CO₂
x mol of C₃H₈ ----- 1.9 mol of CO₂
x = 0.6 mol of C₃H₈
4) Now we transform mole of C₃H₈ into grams using its molar mass.
molar mass of C₃H₈ is: (3×12) + (8×1) = 44 g/mol
mass = mole × molar mass
mass = 0.6 × 44
mass of C₃H₈ = 28 g
Answer: a) mass of C₃H₈ = 28 g
For alternative b we follow the same process starting from step 3:
3)Now we use the proportion of the balanced equation:
5 mol of O₂ ---- 3 mol of CO₂
x mol of O₂ ----- 1.9 mol of CO₂
x = 3.16 mol of O₂
4) Now we transform mole of O₂ into grams using its molar mass.
molar mass of O₂ is: (2×16) = 32 g/mol
mass = mole × molar mass
mass = 3.16 × 32
mass of O₂ = 101 g
Answer: b) mass of O₂ = 101 g
For alternative c we follow the same process starting from step 3:
3) Now we use the proportion of the balanced equation:
4 mol of H₂O ---- 3 mol of CO₂
x mol of H₂O ----- 1.9 mol of CO₂
x = 0.84 mol of H₂O
4) Now we transform mole of H₂O into grams using its molar mass.
molar mass of H₂O is: (2×1) + (1×16) = 18 g/mol
mass = mole × molar mass
mass = 0.84 × 18
mass of H₂O = 15 g
Answer: c) mass of H₂O = 15 g
What is the balanced, net ionic equation for the reaction described below?Aqueous sodium phosphate and aqueous iron (III) chloride react to produce aqueous sodium chloride and solid iron (III) phosphate.
A net ionic equation is the one that only includes the ions that are involved in the formation of the solid.
According to the information the solid formed is iron (III) phosphate, and the ions involved are Fe3+ and PO43-.
It means that the net ionic equation is:
[tex]Fe_{(aq)}^{3+}+PO_{4(aq)}^{3-}\rightarrow FePO_{4(s)}[/tex]The correct answer is the second choice.
6.5 grams of zinc reacted with hydrochloric acid. Calculate how many grams of hydrogen were released. a) 0.1 g. b) 0.2 g. c) 1.0 g. d) 2.0 g.
0.2 grams
ExplanationsThe balanced reaction between zinc and hydrochloric acid is given as:
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]Given the following parameters
Mass of Zinc = 6.5grams
Determine the mole of Zinc
Mole of Zn = mass/molar mass
Mole of Zn = 6.5/65.38
Mole of Zn = 0.0994moles
According to stoichiometry, 1 mole of Zinc produced 1 mole of hydrogen gas, hence the mole of hydrogen gas required will be 0.0994moles
Determine the mass of hydrogen gas produced
[tex]\begin{gathered} Mass\text{ of H}_2=mole\times molar\text{ mass} \\ Mass\text{ of H}_2=0.0944moles\times2.016 \\ Mass\text{ of H}_2=0.19g\approx0.2grams \end{gathered}[/tex]Hence the mass of hydrogen that were released is 0.2 grams
