Question 23
1 pts
When solutions of AgNO3 and NaOH react, the balanced molecular equation is:
2 AgNO3(aq) + 2NaOH(aq) O--> Ag2O(s) + 2 NaNO3(aq) + H20(1)
How much Ag2O is produced when 0.200 g of AgNO3 and 0.200 g of NaOH react?
a. 0.127 g
c. 0.273 g
b. 0.136 g
d. 0.400 g
OB
OC
OA
OD
Answers
Answer:
Option B. 0.136 g
Explanation:
The balanced equation for the reaction is given below:
2AgNO3(aq) + 2NaOH(aq) —> Ag2O(s) + 2NaNO3(aq) + H2O(l)
Next, we shall determine the masses of AgNO3 and NaOH that reacted and the mass of Ag2O produced from the balanced equation. This is illustrated below:
Molar mass of AgNO3 = 108 + 14 + (16x3) = 170g/mol
Mass of AgNO3 from the balanced equation = 2 x 170 = 340g
Molar mass of NaOH = 23 + 16 + 1 = 40g/mol
Mass of NaOH from the balanced equation = 2 x 40 = 80g
Molar mass of Ag2O = (108x2) + 16 = 232g/mol
Mass of Ag2O from the balanced equation = 1 x 232 = 232g
Summary:
From the balanced equation above,
340g of AgNO3 reacted with 80g of NaOH to produce 232g of Ag2O.
Next, we shall determine the limiting reactant. This can be obtained as follow:
From the balanced equation above,
340g of AgNO3 reacted with 80g of NaOH.
Therefore, 0.2g of AgNO3 will react with = (0.2 x 80)/340 = 0.047g of NaOH.
From the calculations made above, only 0.047g out of 0.2g of NaOH given, reacted completely with 0.2g of AgNO3. Therefore, AgNO3 is the limiting reactant and NaOH is the excess reactant.
Now, we can calculate the mass of Ag2O produced from the reaction of 0.2g of AgNO3 and 0.2g of NaOH.
In this case, we shall use the limiting reactant because it will produce the maximum yield of Ag2O as all of it is used up in the reaction.
The limi reactant is AgNO3 and the mass of Ag2O produced can be obtained as follow:
From the balanced equation above,
340g of AgNO3 reacted to produce 232g of Ag2O.
Therefore, 0.2g of AgNO3 will react to produce = (0.2 x 232)/340 = 0.136g of Ag2O.
Therefore, 0.136g of Ag2O was produced from the reaction.
Related Questions
If d represents the density of a gas and k is a constant. The relationship between the rate of diffusion r, and d is ____?
Answers
The relationship between the rate of diffusion r, and d is r ∝ 1/√d.
The relationship between the rate of diffusion (r) and the density of a gas (d) can be explained using Graham's law of diffusion. According to this law, the rate of diffusion of a gas is inversely proportional to the square root of its density. Mathematically, it can be expressed as:
r ∝ 1/√d
where the symbol '∝' represents 'proportional to'. The constant of proportionality (k) can be introduced to this equation as:
r = k/√d
This equation shows that as the density of a gas increases, its rate of diffusion decreases. This is because denser gases have more molecules per unit volume and thus, they experience greater intermolecular collisions that hinder their movement. Therefore, it requires more energy for them to diffuse through a medium compared to less dense gases.
The relationship between the rate of diffusion and density is particularly important in understanding the behavior of gases in different environments. For instance, in a gas chromatography column, the rate of diffusion of a gas determines how quickly it moves through the column and separates from other components. Similarly, in the Earth's atmosphere, the rate of diffusion of greenhouse gases such as carbon dioxide affects their concentration and hence, their impact on climate change.
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Coal is mined from several locations in the US, such as the San Juan Basin of northwestern New Mexico. This fossil fuel formed
A.
from the burial and decomposition of plant material.
B.
as a product of photosynthesis.
C.
as a byproduct of landfill waste.
D.
from molten rock deep in the Earth's interior.
Answers
Answer: A from the burial and decomposition of plant material.
Explanation:
3. Once magnesium (Mg) gives up electron(s) to become an ion, it will become
Answers
Answer:
Option B. Cation that is smaller than the original atom.
Explanation:
Magnesium is a divalent element. This implies that magnesium can give up 2 electrons to become an ion (cation) as shown below:
Mg —> Mg²⁺ + 2e¯
Next, we shall write the electronic configuration of magnesium atom (Mg) and magnesium ion (Mg²⁺). This can be written as follow:
Mg (12) = 2, 8, 2
Mg²⁺ (10) = 2, 8
From the above illustration, we can see that the magnesium atom (Mg) has 3 shells while the magnesium ion (Mg²⁺) has 2 shells.
This simply means that the magnesium ion (Mg²⁺) i.e cation is smaller that the original magnesium atom (Mg).
Guys I really need to you answer this question for me pleaseeeee. Describe one situation in which forces are created.
Answers
The application of force in the direction of the motion of an object. The second scenario involves applying force to a moving item that is traveling in the opposite direction.
What is force ?A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. A force has both a direction and a magnitude.
Force is used to describe a body's tendency to modify or change its state as a result of an external cause. When force is applied, the body can also alter its size, shape, and direction.
A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends.
Thus, Force applied to an item in motion that originates in any direction constitutes the third situation where force is created.
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I need help I don’t understand this is hitting
Answers
Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.
Thus, They are additionally known as limiting reactants or limiting agents. A predetermined quantity of reactants are necessary for the reaction to be completed, according to the stoichiometry of chemical reactions.
In the aforementioned reaction, 2 moles of ammonia are created when 3 moles of hydrogen gas react with 1 mole of nitrogen gas.
In most cases, this reactant dictates when the reaction will end. The reaction stoichiometry can be used to determine the precise quantity of reactant that will be required to react with another element. The limiting agent is determined by the mole ratio rather than the mass of the reactants.
Thus, Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.
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In laboratory experiment, a NOVDEC Student was
required to prepare 500 cm3 of Im Solution of
glucose (c6, H12,06) Determine the
i Molar
Mass
ii) Amount of ghicoseB. In in moles in the Solrition
[ C= 12, H = 10, 0=16]
Answers
Answer:
i. Molar mass of glucose = 180 g/mol
ii. Amount of glucose = 0.5 mole
Explanation:
The volume of the glucose solution to be prepared = 500 \(cm^3\)
Molarity of the glucose solution to be prepared = 1 M
i. Molar mass of glucose (\(C_1_2H_6O_6\)) = (6 × 12) + (12 × 1) + (6 × 16) = 180 g/mol
ii. mole = molarity x volume. Hence;
amount (in moles) of the glucose solution to be prepared
= 1 x 500/1000 = 0.5 mole
What is the molarity of a solution of NaOH that contains 0.350 moles of sodium hydroxide in
1.25 liters of solution?
Answers
Explanation:
from chemical basics is the law of solution concentration which is no. of moles÷ volume
explain the variation of basicity in group III A members down the group
Answers
Answer:
Explained below
Explanation:
Group 3A elements are made up of the metalloid - boron (B) and other metals such as Aluminum (Al), gallium (Ga), indium (In), & thallium (Tl).
Now, as we go down the group, the size of the central atom will increase thereby causing the lone pair to become delocalized over a larger volume space. Thus, it's not readily available for donation and thus basicity increases
6. Given a mixture of gases: 1.00 g He,
14.0 g N2 and 10.0 g NO. What is the total pressure at 27.0 °C if the gases are confined in a 2.00 L container?
A) 0.310 atm
B) 1.24 atm
C) 13.3 atm
D) 21.6 atm
Answers
Considering the ideal gas law, the total pressure at 27.0 °C if the gases are confined in a 2.00 L container is 13.3 atm.
Definition of ideal gas lawAn ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
Where:
P is the gas pressure.
V is the volume that occupies.
T is its temperature.
R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.
n is the number of moles of the gas.
Total pressure in this caseIn this case you know:
mass of He= 1 gr
mass of N₂= 14 gr
mass of NO= 10 gr
molar mass of He= 4 gr/mole
molar mass of N₂= 28 gr/mole
molar mass of NO= 30 gr/mole
moles of He= mass of He÷ molar mass of He= 1 gr÷ 4 gr/mole= 0.25 moles
moles of N₂= mass of N₂÷ molar mass of N₂= 14 gr÷ 28 gr/mole= 0.5 moles
moles of NO= mass of NO÷ molar mass of NO= 10 gr÷ 30 gr/mole= 1/3 moles
total moles= moles of He + moles of N₂ + moles of NO= 0.25 moles + 0.5 moles + 1/3 moles= 13/12 moles
V= 2 L
R= 0.082 (atmL)/(molK)
T= 27 °C= 300 K
Replacing in the ideal gas law:
P×2 L = 13/12 moles×0.082 (atmL)/(molK)×300 K
Solving:
P= [13/12 moles×0.082 (atmL)/(molK)×300 K]÷ 2 L
P= 13.3 atm
Finally, the total pressure is 13.3 atm.
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A soccer player practices kicking the ball into the goal from halfway down the soccer field, which is 45 meters away. The time it takes for the ball to get to the goal from the time it is kicked is 3 seconds. The player wants to know the velocity of the ball.
Is there enough information to calculate this?
Yes, displacement is 45 meters, elapsed time is three seconds, and the direction is toward the goal. Velocity is 135 m/s toward the goal.
No, only speed can be calculated from the distance of 45 meters and the time of 3 seconds.
Yes, displacement is 45 meters, time is three seconds, and the direction is toward the goal. Velocity is 15 m/s towards the goal.
Answers
Answer:
Yes, displacement is 45 meters, time is three seconds, and the direction is toward the goal. Velocity is 15 m/s towards the goal.
Explanation:
Hope this helped!
What is a quasar?
Two stars moving around each other.
A star that emits a repeated radio signal.
A star that emits intense radio and light energy.
A system of stars held together by gravity.
A collapsed star emitting no light.
Answers
A quasar is a star that emits intense radio and light energy.
A quasar is an extremely bright radio source. It is called a quasi-stellar radio source. It appears to be like a star but is not a star. These quasars are young galaxies that are located far away from us and are highly luminous. The luminosity of a quasar is 1000 times greater than the luminosity of a milky way galaxy.
A quasar is powered by a supermassive black hole with its mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc.
The quasars were first discovered in the 1950s using the Hubble space telescope and were found to be a massive bright source emitting radio waves of unknown origin. But now, millions of quasars were discovered.
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Calculate the concentration in mol/L, M, of an aqueous sugar solution with a concUsing the above equation, how many grams of salt ( CaCl2 ) would need to be added to 1 L of water in order for the boiling point of the solution to reach 106 °C ? Assume that the density of water is 1.0 g/mL and that CaCl2 completely dissociates into three ions — i.e., a Ca2+ ion and two Cl− ions. The boiling point constant, kb , for water is 0.515°C/m .entration of 17.0% (w/w) and density of 1.015 g/mL at 25°C . The molecular weight of sugar is 342.30 g/mol. Report your answer to three significant figures.
Answers
The molar mass of the sugar is obtained as 1.43 g/mol.
What is the molecular mass?We know that the boiling point of a substance is one of the properties of the substances that could be called the colligative properties since they can be affected by the number of particles present.
We are told that the mass concentration of the substances w/w of the solution is 17% thus we have 17 g of the compound and 83 g of water. We can now get the number of moles of the substance as;
Number of moles = ?
Mass of the solution = 1000 mL * 1.015 g/mL = 1015 g or 1.015 Kg
Given that;
ΔT = K m i
ΔT = Boiling point elevation
K = Boing constant of water
m = molality of the solution
i = Van't Hoff factor
ΔT = 106 °C - 100°C
= 6 °C
Then;
6 = 0.515 * 17/MM * 1/1.015 * 1
Where MM = molar mass of the sugar
6 = 0.515 * 17/1.015 MM * 1
6 = 0.515 * 17/1.015 MM
6 = 8.755/1.015 MM
6 * 1.015 MM = 8.755
MM = 8.755/6 * 1.015
MM = 1.43 g/mol
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(b) Two compounds, A and B, have the molecular formula C₂H6O. On treatment with Na metal, compound A releases H2 gas and compound B does not.
Can you give a reason to help to explain the observation better?
Answers
The observation that compound A releases H2 gas while compound B does not when treated with Na metal can be explained by considering the structural differences between the two compounds and their ability to undergo specific reactions.
Compound A and compound B both have the molecular formula C₂H₆O, which indicates that they both contain two carbon atoms, six hydrogen atoms, and one oxygen atom. However, the difference lies in the arrangement of these atoms within the molecules. One possible explanation for the observed difference is that compound A is an alcohol, specifically ethanol (CH₃CH₂OH), while compound B is an ether, such as dimethyl ether (CH₃OCH₃). The presence of the hydroxyl group (-OH) in ethanol enables it to undergo a reaction with sodium metal, known as the metal-acid reaction. In this reaction, the metal displaces the hydrogen from the hydroxyl group, forming sodium ethoxide (CH₃CH₂ONa) and releasing hydrogen gas (H₂). On the other hand, ethers like dimethyl ether lack the hydroxyl group and therefore cannot undergo the metal-acid reaction. Consequently, when compound B is treated with sodium metal, no hydrogen gas is released. The ability of compound A to release hydrogen gas while compound B does not when treated with sodium metal can be attributed to the presence of a hydroxyl group in compound A (ethanol), enabling it to undergo a metal-acid reaction, whereas compound B (dimethyl ether) lacks the necessary functional group and thus does not undergo this reaction.
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Indicate how the concentration of each species in the chemical equation will change to reestablish equilibrium after changing the concentration of the reactant or product. An up arrow indicates an increase in concentration, a down arrow indicates a decrease in concentration, and leaving it blank means there is no change in the concentration. after the concentration of Br₂ is decreased after the concentration of HBr is increased H₂(g) + Br₂(g) O 0 □ ↓ Answer Bank ↑ 2HBr(g) 0 □
Answers
The concentration of species in the reaction changes the reaction in the following ways: decrease carbon dioxide = forward direction of reaction.
The direction of the reaction can be assessed by the following. On increasing the concentration of the reactant the reaction processes in the forward direction. On increasing the concentration of product the reaction processes in the backward direction.
The given equilibrium is:
2CO(g) + O2(g) ↔ 2CO2(g)
increase CO = forward direction of reaction
increase oxygen = forward direction of reaction
decrease CO = no change in equilibrium as reaction not processes.
decrease oxygen = no change in equilibrium as reaction not processes.
increase carbon dioxide= reverse direction
decrease carbon dioxide = forward direction of reaction.
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what are interstitial compounds?
Answers
Answer:
1. An interstitial compound or alloy is a compound that is formed when small atoms like hydrogen, boron, carbon or nitrogen are trapped in the interstitial holes in a metal lattice. 2. They are usually non-stoichiometric compounds. 3. Transition metals form a number of interstitial compounds such as TiC, ZrH1.92 , Mn4N etc. 4. The elements that occupy the metal lattice provide them new properties. They are hard and show electrical and thermal conductivity They have high melting points higher than those of pure metals Transition metal hydrides are used as powerful reducing agents Metallic carbides are chemically inert
Interstitial compounds are formed when small atoms such as H, C or N are trapped inside the crystal lattices of metals. They are usually nonstoichiometric and are neither typically ionic nor covalent
i need help with chemistry please help thank you so much
Answers
Explanation:
We are given: Pressure of krypton gas = 0.644 atm
: Temperature of krypton gas = 281 K
: Volume of krypton gas = 0.855 L
We know: Ideal gas constant = 0.082 L.atm/K.mol
We use the ideal gas law to find the number of moles:
\(\begin{gathered} PV\text{ = nRT} \\ \\ \therefore n\text{ = }\frac{PV}{RT} \\ \\ \text{ = }\frac{0.644\times0.855}{0.082\times281} \\ \\ \text{ = 0.024 mol} \end{gathered}\)Answer:
Moles of Kr in the sample is 0.024 mol.
Write the balanced, nuclear equation for the positron emission from the Thallium-201 radioisotope.
Answers
The balanced nuclear equation for the positron emission from the Thallium-201 radioisotope is given below as:
²⁰¹₈₁Tl ---> ⁰₊₁e + ²⁰¹₈₂HgWhat is positron emission?Positron emission is a form of nuclear reaction in which a proton inside the nucleus of a radioactive element is converted into a neutron.
Positron emission is also known as beta plus decay, or β⁺ decay.
Positron emission does not result in changes in the mass number of the new atomic nucleus, but the atomic number of the new atomic nucleus is less than that of the original element by 1.
Nuclear reactions are reactions that involve changes occurring in the nucleus of an atom.
Radioactive elements are elements that spontaneously decay and release nuclear particles as well as radiation.
In the positron emission from the Thallium-201 radioisotope, the new atom formed will have one less proton than the original element.
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How many grams of NaOH (MW = 40.0) are there in 500.0 mL
of a 0.175 M NaOH solution?
A) 3.50
B) 114
C) 14.0
D) 2.19x10
Answers
Answer:
3.5
Explanation:
500*0.175= 8.75 *40/1000=3500/1000=3.5
Answer:
3.50 grams
Explanation:
Mastering chem
6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
Answers
superficial zone chondrocytes can get compacted under physiological loading: a multiscale finite element analysis.
a. true
b. false
Answers
The statement "Superficial zone chondrocytes can get compacted under physiological loading: a multiscale finite element analysis" is true.
Superficial zone chondrocytes are the most exposed to mechanical loading and are therefore at risk of being compacted under physiological loading. A multiscale finite element analysis can be used to model and predict the mechanical behavior of cartilage under physiological loading, allowing for a better understanding of the factors that affect its mechanical properties.
This means that chondrocytes in the superficial zone of cartilage are at risk of being compacted under the physiological loading that it experiences in everyday life. A multiscale finite element analysis can be used to model and predict the mechanical behavior of cartilage under physiological loading, allowing for a better understanding of the factors that affect its mechanical properties.
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name the quantum number that specifies the size of an atomic orbital?
Answers
Answer:
The principal quantum number (n) describes the size of the orbital. Orbitals for which n = 2 are larger than those for which n = 1, for example.
A 1.85-mole sample of H₂O2 weighs
(A) 33.3 amu
(B) 35.9 g
C) 62.9 g
(D) 1.85 g
E 33.3 g
Answers
Considering the definition of molar mass, the correct answer is option c): the mass of 1.85 moles H₂O₂ is 62.9 grams.
Definition of molar massThe molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.
The molar mass of a compound is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.
Molar mass of H₂O₂In this case, you know the molar mass of the elements is:
O= 16 g/moleH= 1 g/moleSo, the molar mass of the compound H₂O₂ is calculated as:
H₂O₂= 2× 1 g/mole + 2× 16 g/mole
Solving:
H₂O₂= 34 g/mole
Mass of 1.85 moles H₂O₂You can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 34 grams, 1.85 moles of the compound contains how much mass?
mass= (1.85 moles× 34 grams)÷ 1 mole
mass= 62.9 grams
Finally, the mass of 1.85 moles H₂O₂ is 62.9 grams.
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What is the coefficient of aluminum (Al)?
( I’m confused because I’m not sure whether it wants the Al from the reactants or products side )
Answers
Answer:
answer : a. 4
explanation:
if u look at the reactants, the coefficient of the Al is 4, while the product the coefficient is 2. By the way, if u look properly u can see that at the product side, the Al is written as Al2, which means that, the coefficient 2 is need to be multiply by 2 from the Al2.
Reactant = 4Al
Product = 2Al2, therefore the 2 at the Al2, should be multiply be the coefficient to make it 4.
difference between phosphorus
and potassium
Answers
Part A
Which claim is supported by evidence in the passage?
Lewis's father was strict.
Lewis's family's troupe was successful.
Lewis was too young to remember his lines.
Lewis did not want to perform because patrons threw eggs.
Answers
Hamilton explained the choice on the On Purpose show, admitting that the pair's work connection from karting to F1 had placed a burden on an otherwise strong friendship.
Why did Lewis have a falling out with his father?Lewis Hamilton now has a close connection with his father Anthony, but this was not always the case during his Formula One tenure. Anthony had a significant influence on his son's career, notably working multiple jobs to finance Hamilton's early foray into racing until he was signed by McLaren at the age of 11.
However, his earnings outside of Formula One rose from $8 million in 2021 to $12 million in 2022. Hamilton was the highest-paid Formula One racer. He has profitable agreements with companies such as Monster energy drinks.
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Which is NOT a compound?
A. silicon dioxide
B. water
C. carbon dioxide gas
D. oxygen gas
Answers
Answer: Oxygen
Explanation: Its found on the periodic table as an element.
What did ancient astronomers not know about eclipses?
Answers
Answer:
yes of course everyone know eclipse in ancient January 2004 eclipse was founded in other country's
3. A balloon is filled with a mystery fluid that has a mass of 1000 kg and a volume of
of |
500 mL.
A. What is the density of the fluid?
B. Will the balloon sink or float in water?
(Helpppp ppls)
Answers
10000g/5 mL, 2000 g/mL
Density water= 1 g/mL
It is denser than water so it should sink
Why is the bond angle in a water molecule less than the bond angle of methane
Answers
Answer:
The H—C—H bond angle in methane is the tetrahedral angle, 109.5°. This angle is obtained when all four pairs of outer electrons repel each other equally. The bond angles in ammonia and in water are less than 109.5° because of the stronger repulsion by their lone pairs of electrons.
Explanation:
hope it helps!
Which two phrases describe the movement of thermal energy due to
convection currents in the water on Earth?
O A. From the bottom of the ocean to the surface
B. From the surface of the ocean to the bottom
C. From cooler parts of Earth to the equator
D. From the equator to cooler parts of Earth
Answers
Answer:
D. From the equator to cooler parts of Earth
Explanation:
Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature. Moving particles transfer thermal energy through a fluid by forming convection currents.
Answer:
B. From the surface of the ocean to the bottom
D. From the equator to cooler parts of Earth
Explanation:
Test approved