Answer:Homogeneous catalysts:NO(g), KI(aq.)
Heterogeneous catalyst:H₂(g) bonded to a metal surface,Pd(s) Coating
Explanation:
Homogeneous catalysis is a catalysis reaction in which the reactants as well the catalyst catalyzing the reaction are in the same phase that is, the catalyst and reactants have same phase.
In the examples NO(g) which acts as a catalyst for the oxidation of SO₂(g) to SO₃(g) is in the same gaseous phase as the reactant SO₂(g). So this is an example of homogeneous catalysis.
In the example KI(aq.) which acts as a catalyst for the decomposition of H₂O₂(aq.) is in the same aqueous phase as reactant H₂O₂(aq.). So this is an example of homogeneous catalysis.
Hence NO(g) and KI(aq.) are homogeneous catalysts.
Heterogeneous catalysis is a catalysis reaction in which the reactants and catalyst are in different phase . That is the catalyst and reactant do not have same phase.
In the examples H₂(g) bonded to a metal surface is an example of heterogeneous catalysis as the phase of H₂(g) and metal surface(s) are different hence this is an example of heterogeneous catalysis.
The Pd(s) acting as a catalyst for the conversion of noxious gas to less harmful gas is also an example of heterogeneous catalyst as the phase of Pd(s) and gases are different. Pd(s) is solid and the gases are gaseous in nature.
B. atom
C. neutron
D. electron
Answer:
D. electron
Explanation:
Electrons have a negative charge
Answer:
a. 5.39 atm
Explanation:
Pressure = ?
Volume = 1 L
Temperature = 298 K
Mass = 9.70g
The formular relating these variables is the ideal gas equation;
PV = nRT
where R = gas constant = 0.082057 L.atm.K-1.mol-1
n can be obtained from the formular below;
n = mass / molar mass = 9.70 / 44
n = 0.2205 mol
P = nRT / V
P = 0.2205 * 0.082057 * 298 / 1
P = 5.392 atm
The correct option is option A.
Intensive properties are physical properties that do not depend on the amount or size of the material being measured. In other words, they remain constant regardless of the quantity of the substance.
The correct answer is b. magnetism.
Out of the options provided:
a. mass is an extensive property because it depends on the amount of the substance. If you have more of a substance, you will have a greater mass.
b. magnetism is an intensive property because it remains the same regardless of the size or amount of the material with the magnetic property.
c. shape is not a standard property used to classify intensive or extensive properties. It is more of a description of the object's form.
d. volume is an extensive property because it depends on the size and amount of the substance. If you have more of a substance, you will have a larger volume.
Learn more about magnetism from the link given below.
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Answer:
b. Magnetism (sorry im very late)
Explanation:
Intensive properties do not depend on size, no matter what it doesn't. For example, magnetism, density, melting and boiling points, and color. All of those support intensive property.
Answer:
23.84g CH30H
32.81g H2O
Explanation:
We will be using the definition of mole fraction to determine the relationship between the number of moles of methanol,
CH3OH , and the number of moles of water.
But mole fraction gives the ratio between the number of moles of a component i of a solution to the total number of moles present in that solution.
CHECK THE ATTACHMENT FOR DETAILED EXPLANATION
In a 66.0g aqueous solution of methanol with a mole fraction of 0.290, the mass of the methanol is approximately 19.14g and the mass of the water is approximately 46.86g.
In this aqueous solution of methanol (CH4O), we know that its mass is 66.0g and the mole fraction of methanol is 0.290. The mole fraction is defined as the ratio of the number of moles of a component to the total number of moles of all components in the solution.
In order to find the mass of each component, namely the methanol and the water, we first need to establish that if the mole fraction of methanol is 0.290, the mole fraction of water must be 0.710 (because the total of all mole fractions in a solution is always equal to 1).
We then can set up the following proportion: mass of methanol/mass of water = mole fraction of methanol/mole fraction of water. After solving this equation, the mass of methanol will be approximately 19.14g and the mass of the water will be approximately 46.86g.
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released the drugs into the cancer cells?
a) Graphite and diamond because these well known substances have been used
for years to treat cancer
b) Graphite because it is found in pencils and is a good lubricant
c) Fullerene and carbon nanotubes because they have empty spaces inside the
molecules
d) Diamond because it is one of the hardest substances
Answer:
c) Fullerene and carbon nanotubes because they have empty spaces inside the molecules
Explanation:
Fullerene and carbon nanotubes would be the most desired in order to hold the cancer fighting drugs and to carry them through the body safely.
b) Calculate the mass of NaHCO3 required to produce 20.5 g of CO2.
Answer:
a. NaHCO₃ + HCl → NaCl + H₂O + CO₂
b. 39.14 g is the mass of NaHCO₃ required to produce 20.5 moles of CO₂
Explanation:
A possible reaction for NaHCO₃ to make dioxide is this one, when it reacts with hydrochloric to produce the mentioned gas.
NaHCO₃ + HCl → NaCl + H₂O + CO₂
Ratio in this reaction is 1:1
So 1 mol of baking soda, produce 1 mol of CO₂
Let's calculate the moles
20.5 g CO₂ / 44 g/m = 0.466 moles
This moles of gas came from the same moles of salt.
Molar mass baking soda = 84 g/m
Molar mass . moles = mass
84 g/m . 0.466 moles = 39.14 g