A mixture of 0.220 moles co, 0.350 moles n2 and 0.640 moles ne has a total pressure of 2.95 atm. what is the pressure of co? 8) _______
a.0.536 atm
b.0.955 atm
c.1.54 atm
d.1.86 atm
e.0.649 atm
The pressure of CO in the given mixture is 0.536 atm, calculated using the concept of partial pressure in ideal gas law.
Explanation:In this question, we are using the concept of partial pressure which is a part of ideal gas law. The formula we use is P(K) = X(K) * P(total), where P(K) is the pressure of component K, X(K) is the mole fraction of the component K, and P(total) is the total pressure. The mole fraction is given by the ratio of the number of moles of a component to the total number of moles.
First, we calculate the total number of moles which is 0.220 + 0.350 + 0.640 = 1.210 moles. The mole fraction of CO is 0.220/1.210 = 0.1818. Now we can find the pressure of CO by multiplying the mole fraction with the total pressure. Therefore, P(CO) = 0.1818 * 2.95 atm = 0.536 atm.
So, the pressure of CO in this mixture is 0.536 atm.
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A chemist determines by measurements that 0.030 moles of nitrogen gas participate in a chemical reaction. calculate the mass of nitrogen gas that participates.
What causes the reaction between baking soda and vinegar?
Baking soda reacts with vinegar to produce sodium acetate, water, and carbon dioxide gas, causing bubbling and fizzing. The pH of the solution changes from acidic to closer to neutral as the reaction proceeds.
Explanation:Reaction Between Baking Soda and VinegarThe reaction between baking soda (sodium bicarbonate, NaHCO3) and vinegar (acetic acid, CH3COOH) is a classic example of an acid-base reaction. When these two substances mix, they react to form sodium acetate (NaCH3COO), water (H2O), and carbon dioxide gas (CO2). The formation of carbon dioxide gas is responsible for the bubbling and fizzing observed during the reaction, as the gas escapes from the liquid mixture.
Change in pHAs the reaction proceeds, the pH of the solution initially becomes less acidic due to the neutralizing effect of the baking soda, a base, on the vinegar, which is an acid. Eventually, though, as the reactants are converted to products, the solution will stabilize at a pH determined by the resulting mixture of sodium acetate and water, which is typically closer to neutral.
Nitrogen has an electronegativity of 3.0, and hydrogen has an electronegativity of 2.1. which describes the bond between nitrogen and hydrogen?
For neutral molecules, which statements about covalent lewis structures are true?
A reaction where one element replaces another in a compound is called a
Classify each of the changes as a physical change or a chemical change. "burning wood"
In one or two sentences explain why fossil fuel combustion is a one-way path while the combustion of modern plant materials is a cycle.
A hiker seals a plastic bag that contains dried fruits before he climbs a mountain. What will most likely happen to the plastic bag as the hiker reaches the top of the mountain?
The bag will expand.
The bag will shrink.
The bag will remain the same size.
The bag will allow air to enter
Answer: A
Explanation:
Carbon dioxide is ________. the most abundant greenhouse gas the most potent (per molecule gas. of the greenhouse gases the only greenhouse gas presently decreasing in the atmosphere the main anthropogenic greenhouse gas produced in the united states the only greenhouse gas presently increasing in the atmosphere
When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. what is the chemical equation of this coupled process? show that the reaction is in equilibrium, include physical states, and represent graphite as c(s)?
According to Archimedes' Principle, what condition has to be met for an object to float?
A. buoyant force has to be less than the weight of the object
B. buoyant force has to equal the weight of the object
C. buoyant force has to be greater than the weight of the object
D. buoyant force has to equal exactly half the weight of the object
Answer:
Buoyant force has to be greater than the weight of the object
Explanation:
According to Archimedes principle, the upward buoyant force is equal to the weight of the liquid displaced if an object is fully or partially immersed in a liquid. When an object is immersed in water, two forces act on it :
1. Buoyant force or upthrust, an upward force, which opposes the weight of an object inside water.
2. Gravitational force, which act in downward direction always.
The floating or sinking of an object depend on the amount of buoyant force. If the buoyant force is greater than the weight of the object, it will float and if the buoyant force is less than the weight of the object, it will sink in liquid.
Hence, the correct option is (c) " buoyant force has to be greater than the weight of the object".
One _______ is the amount of time needed for half of a given amount of radioisotope to decay into its stable daughter product.
If you accidentally spill a chemical on your skin, what should you do… Immediately? Next?
Identify all correct statements about the ionization of water.check all that apply.check all that apply.water ionizes to form peroxide and hydronium ions.dissociation of water produces equal numbers of oh- and h+.dissociation of water is reversible.water ionizes to form hydroxide and hydronium ions.dissociation of water produces equal masses of oh- and h+.dissociation of water is not reversible.
Water ionizes to form hydronium (H3O+) and hydroxide (OH-) ions, a process that is reversible and produces equal numbers of H+ and OH- ions but not equal masses due to their differing molar masses. The dissociation of water is an equilibrium process involving autoionization.
Explanation:When water ionizes, it does not form peroxide; instead, it ionizes to form hydronium ions (H3O+) and hydroxide ions (OH-). The dissociation of water is indeed reversible, and it does produce equal numbers of hydrogen (H+) ions and hydroxide (OH-) ions, but it does not produce equal masses of these ions due to their differing molar masses. The statement that water ionizes to form hydronium and hydroxide ions is correct, as is the statement that the dissociation of water is reversible and that it produces equal numbers of H+ and OH- ions. Water is a polar molecule, having a partial negative charge due to the oxygen's electronegativity, which allows it to attract H+ ions to form hydronium. The process of water molecules dissociating and recombining is an example of autoionization, and the equilibrium constant for the ionization of water is known as the ion-product constant for water (Kw).
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Using the periodic table, how would you find elements with chemical properties similar to helium?
To find elements with chemical properties similar to helium, we need to look for elements in the same group as helium in the periodic table. Helium belongs to Group 18 or the noble gases. Other elements in Group 18, such as neon, argon, krypton, xenon, and radon, also have similar chemical properties to helium.
Explanation:The elements in the periodic table are organized into groups (columns) based on similar chemical properties. To find elements with chemical properties similar to helium, we need to look for elements in the same group as helium in the periodic table. Helium belongs to Group 18 or the noble gases. Other elements in Group 18, such as neon, argon, krypton, xenon, and radon, also have similar chemical properties to helium.
Give the nuclear symbol for the isotope of phosphorus for which a=31? enter the nuclear symbol for the isotope (e.g., 42he).
Identify the arrows that show removal of thermal energy when matter changes state.
Phytic acid, tannins, and oxalates _____the absorption of many minerals.
One tank of gasoline has an octane rating of 140 and another tank of gasoline has an octane rating of 80. to obtain a mixture of 60 gallons with an octane rating of 120, how many gallons should be used from the tank with the octane rating of 80?
To achieve a 60-gallon mixture with an octane rating of 120, the student should use 20 gallons from the tank with an octane rating of 80.
The student's question involves calculating the amount of gasoline to use from each tank to create a mixture with a desired octane rating. This is a problem that can be solved using the concept of weighted averages. Here, we need to find the number of gallons of gas with an octane rating of 80 to mix with gas with an octane rating of 140 to achieve a final mixture of 60 gallons with an octane rating of 120.
Let the amount of gasoline used from the tank with octane rating 80 be x gallons, and hence the amount used from the tank with octane rating of 140 will be (60 - x) gallons. We can write the following equation based on the weighted average of octane ratings:
80x + 140(60 - x) = 120(60)
Solving the equation:
Multiply out the terms: 80x + 8400 - 140x = 7200.
Combine like terms: -60x + 8400 = 7200.
Subtract 8400 from both sides: -60x = -1200.
Divide both sides by -60: x = 20.
So, the student should use 20 gallons from the tank with an octane rating of 80 to obtain a 60-gallon mixture with an octane rating of 120.
Bef42â is called the fluoberyllate ion. the formal charge on the beryllium atom in this ion is
The two most reactive families of elements are the halogens and the alkali metals. how do they differ in their reactivities?
After many uses, your teakettle may develop some deposits on the inside of the kettle. These deposits are a result of:
solutes dissolving in a solution
solutes becoming un-dissolved from a solution
solvents dissolving in a solution
solutions forming from solutes and solvents
I think it's B., am I correct?
EDIT:
Never Mind, I don't need help anymore. I was right, it was B. I'm happy I got it right on my own, but still disappointed that no one tried to help me... :(
What is the most appropriate si (metric) unit for measuring the length of an automobile?
A pharmacist has calculated that a patient requires 30 mmol of phosphate and 80 meq of potassium to be added to the pn. how many milliliters of potassium phosphate and how many milliliters of potassium chloride will be required? [k-phos is 3 mmol phosphate with 4.4 meq potassium per ml and kcl is 2 meq of potassium per ml.]
Final answer:
The patient requires 10 ml of potassium phosphate to obtain 30 mmol of phosphate, and 18 ml of potassium chloride to cover the remaining 36 meq of potassium out of the 80 meq required.
Explanation:
To determine how many milliliters of potassium phosphate and potassium chloride will be required, we must use the information provided on the concentrations of phosphate and potassium in each solution. The patient requires 30 mmol of phosphate and 80 meq of potassium.
K-Phos contains 3 mmol of phosphate and 4.4 meq of potassium per ml. To get the required 30 mmol of phosphate, we calculate:
30 mmol ÷ 3 mmol/ml = 10 ml of K-Phos
This will also provide:
10 ml x 4.4 meq/ml = 44 meq of potassium
We still need 80 meq - 44 meq = 36 meq of potassium, which can be supplied by KCl, containing 2 meq of potassium per ml.
36 meq ÷ 2 meq/ml = 18 ml of KCl
Therefore, 10 ml of potassium phosphate and 18 ml of potassium chloride are required to meet the patient's needs.
What fraction of atoms in morphine is accounted for by carbon?
Answer:
[tex]\frac{17}{40}[/tex] or 0.425 fraction of atoms in morphine is accounted by carbon.
Explanation:
Morphine has molecular formula of [tex]C_{17}H_{19}NO_3[/tex].
Morphine is a medicinal compound used in treatment of pain.It belongs to the family of opiate family found naturally in many plants and animals.
Number of total atoms of all elements in 1 molecule of morphine = 40
Number of carbon atoms in 1 molecule of morphine = 17
Fraction of carbon atoms in morphine:
[tex]\frac{\text{Number of carbon atoms}}{\text{Total number of atoms}}[/tex]
[tex]=\frac{17}{40}=0.425[/tex]
[tex]\frac{17}{40}[/tex] or 0.425 fraction of atoms in morphine is accounted by carbon.
How many moles of water are needed to react with 2.2 moles of li2o? given: li2o + h2o â 2 lioh?
Final answer:
2.2 moles of water are needed to react with 2.2 moles of Li2O according to the 1:1 molar ratio in the chemical equation Li2O + H2O → 2 LiOH.
Explanation:
To answer how many moles of water are needed to react with 2.2 moles of Li2O, we need to analyze the given chemical equation: Li2O + H2O → 2 LiOH. According to the equation, 1 mole of Li2O reacts with 1 mole of H2O to produce 2 moles of LiOH. Since the ratio of Li2O to H2O is 1:1, it means that to react with 2.2 moles of Li2O, we will also need 2.2 moles of water.
Rotting waste in landfills produces a gas that can be captured and used to generate electricity. what is this gas called?
Answer: The gas produced will be methane gas.
Explanation:
When waste is filled in the landfills, it gets rotten and it undergoes an aerobic decomposition (In the presence of oxygen), little methane gas is produced.
When the waste remains there, i less than a year, anaerobic conditions begin to generate (in the absence of oxygen) and methane-producing bacteria begin to decompose the waste and produces methane in a large amount.
This gas is also known as marsh gas and is considered as a greenhouse gas. This gas increases the temperature of the Earth's surface.
Hence, the gas produced will be methane gas.
(a) How much negative charge is on each oxygen of the carbonate ion?
Each oxygen atom in the carbonate ion (CO3^2−) carries a charge of approximately -2/3.
In the carbonate ion (CO3^2−), there are three oxygen atoms bonded to a central carbon atom. The overall charge on the carbonate ion is -2. Since the charge is distributed among three oxygen atoms, we can consider the charge per oxygen atom.
If we distribute the charge evenly among the three oxygen atoms, each oxygen atom would carry a charge of −2/3. This distribution accounts for the fact that the charge is shared equally among the three oxygen atoms in the carbonate ion. Therefore, each oxygen atom in the carbonate ion is considered to have a partial negative charge of approximately −2/3.
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Be-6 what must be done with the vessel’s registration paper?
The Certificate of Documentation must stay onboard a Vessel Registration Number while it is in US waters, in accordance with Title 46 for the Code of Federal Regulations (CFR), Part 67.
Make sure it complies with the following specifications. Your boat's or vessel's bow must have their Vessel Registration Number permanently painted or fastened to either side be shown in larger than three-inch-high figures and simple, vertical block letters. The Certificate of Documentation must stay onboard a vessel while it is in US waters, in accordance with Title 46 for the Code of Federal Regulations (CFR), Part 67.
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