Review the formula for each acid, then determine if the acid is is monoprotic or polyprotic.
H2PO4 :
H2SO4 :
HNO3 :
CH3COOH :
HCI :
H2CO3 :
Answers
\(H_3PO_4\) is polyprotic, \(H_2SO_4\) and \(H_2CO_3\) are diprotic, and the rest \(HNO_3\), \(CH_3COOH \) and HCl are monoprotic acids.
\(H_3PO_4\): This acid is polyprotic, as it has three protons that can be donated.
\(H_2SO_4\): This acid is diprotic, as it has two protons that can be donated.
\(HNO_3\): This acid is monoprotic, as it has only one proton that can be donated.
\(CH_3COOH \): This acid is monoprotic, as it has only one proton that can be donated.
HCI: This acid is monoprotic, as it has only one proton that can be donated.
\(H_2CO_3\): This acid is diprotic, as it has two protons that can be donated.
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Related Questions
a 1.00-l flask contains nitrogen gas at 25°c and 1.00 atm pressure. what is the final pressure in the flask if an additional 2.00 g of n2 gas is added to the flask and the flask cooled to -55°c?
Answers
After adding 2.00 g of N₂ gas and cooling the flask to -55°C, the final pressure in the flask is approximately 1.91 atm.
To determine the final pressure in the flask after adding 2.00 g of N₂ gas and cooling the flask to -55°C, we can use the ideal gas law:
PV = nRT,
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Given:
Initial pressure (P₁) = 1.00 atm
Initial temperature (T₁) = 25°C = 25 + 273.15 = 298.15 K
Final temperature (T₂) = -55°C = -55 + 273.15 = 218.15 K
Additional N₂ gas added (m) = 2.00 g
Molar mass of N₂ (M) = 28.0134 g/mol
Volume (V) = 1.00 L
First, we calculate the number of moles of the initial gas using the ideal gas law:
n₁ = (P₁V) / (RT₁).
Next, we calculate the number of moles of the additional N₂ gas:
n₂ = m / M.
Then, we calculate the total number of moles in the flask after adding the N₂ gas = n₁ + n₂ = n
Using the ideal gas law, we can calculate the final pressure:
P₂ = (nRT₂) / V.
So,
n₁= [(1.00 atm * 1.00 L) / (0.0821 L·atm/(mol·K)(298.15 K)] ≈ 0.0404 mol
n₂ = 2.00 g / 28.0134 g/mol ≈ 0.0714 mol
n = 0.0404 mol + 0.0714 mol = 0.1118 mol
Hence,
P₂ = (0.1118 mol * 0.0821 L·atm/(mol·K) * 218.15 K) / 1.00 L ≈ 1.91 atm.
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Select all that apply.
When the products of a reaction have less energy than the reactants:
The reaction is exothermic.
The reaction is endothermic.
The reactants lost internal energy.
The change in enthalpy is positive.
Answers
Answer:
The reaction is endothermic
Explanation:
we know that the reactants had to get energy from its surroundings which means that the reaction is endothermic
Plz help..........................
Answers
Answer:
this is because aluminium is a non renewable source of material. the process to mine it is expensive. the process releases greenhouse gases which are harmful to the environment. it takes a long time to extract the aluminium. it is a way to help reduce waste products.
( this answer will only get you about 5 marks you need one more point in your answer. I just couldn't be bothered to think about another one.)
Calvin goes for a walk outside and begins to sweat. His sweat will not evaporate. What is the most likely cause of this?
D. A wind speed of 40 mph
E. An air temperature of 7 °C or 45 °F
F. A strong northerly wind
G. A relative humidity of 95%
Answers
Answer:D
Explanation:it makes sense alot
Answer: D) A relative humidity of 95%
Explanation:
Why do we use nutrient agar jelly to grow our samples on
Answers
Answer:
To give the bacteria the opportunity to cultivate.
Explanation:
If you really think about it, us humans eat because we extract the energy from food to power our cellular reactions. Assuming you mean for bacteria, they are like us in the sense that they need nutrients so their systems can keep running (metabolism - the sum of all chemical reactions in a specimen). We give them what they need so they can grow, much like how we need to eat food to grow. We do this so they can proliferate. Then we can study them once there are enough. The agar is really just to provide a semi-solid medium to keep the bacteria samples suspended at the top. If it was liquid they would sink down to the bottom, and then you couldn't interact with them as easy. You can also think of it as a solid surface for them to grow on so they can grow in colonies. Hope this helps.
which of the following elements is the largest?
A. Boron
B. Nitrogen
C. Oxygen
D. Carbon
Answers
Answer:
A) Boron
Explanation:
I put oxygen and it was wrong lol. So, it said it was Boron
How many moles of hydrogen are produced from the reaction of 50.0 g of Mg and the equivalent of 75 g of HCl?
Answers
Answer:
1.03 mol of dihydrogen gas will evolve, with a volume slightly over
22.4 \(dm^{3}\) at STP.
Explanation:
industrial gases cause acid rain why
Answers
because the industrial gas is very harmful for us it is made up chemical and toxic gases
Answer:
The usual culprit is burning coal.
Explanation:
This produces a lot of carbon dioxide as well as sulphur dioxide. Other industrial processes, and vehicle emissions, produce similar oxides unless they are 'scrubbed' out. They react with atmospheric moisture to produce acids like carbonic, sulphurous and nitrous acids. Which is then precipitated. It should be remembered that a volcanic eruption has this effect too.
A student converted 400 centimeters into meters. Which of the following shows the student's answer with the correct number of significant digits?
Answers
Answer:
4 meters
Explanation:
100 centimeters to meters, so move the decimal 2 spaces left.
400 becomes 4.00
An isotope of platinum has 100 neutrons. What is the atomic number of this specific isotope of platinum?
100, 98, 195, 198
Answers
Answer:
isotopes of the same elements have the same atomic number
3. What if only 25% of Greenland’s ice melted into the ocean? Explain your reasoning.
Answers
If theDaily Value (DV) for Ca?+ to maintain bone strength in older women is 1500 mg, how many Tums tablets are needed each day?
Answers
To obtain 600 mg or elemental calcium, you must take three Tums tablets daily. Every day, a lot of Tums tablets are required.
Which is superior, calcium carbonate or calcium ions?Because they contain the most elemental calcium (approximately 40% by weight), calcium carbonate supplements are typically the greatest value. It's recommended to take calcium carbonate with food because it needs stomach acid to be absorbed.
What calcium supplementation strategy is best for osteoporosis?The two calcium chemicals that are typically frequently utilized are calcium carbonate and calcium citrate. A meal should be consumed together with calcium carbonate supplements since they dissolve easier in an acidic environment. Supplements containing calcium citrate can be taken whenever because they don't need an acid to dissolve.
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Properties of a substance which can be measured or observed without altering the identity of the substance being measured are _____. A.) physical properties B.) chemical properties C.) reactive properties D.) phase properties
Answers
Answer:
The correct answer is physical properties and/or phase properties.
Explanation:
Chemical properties can alter the substance (if you burn wood, it becomes ash and is no longer wood).
Reactive properties are also chemically changing the substance.
Phase properties are where the element can be in solid, liquid, or gas form so these could also be an answer.
In the addition reaction of HCl to 2-methyl-2-butene, what is the first mechanistic step? a)The pi electrons of the double bond attack the H of HCl (and the H-to-Cl bond cleaves); this attack adds the H to C3 and creates a carbocation at C2 O b)The pi electrons of the double bond attack the H of HCl (and the H-to-Cl bond cleaves); this attack adds the H to C2 and creates a carbocation at C3 c) Chloride ion attacks carbon 3 (C3) d)A hydride ion abstracts one of the 2-methyl hydrogens (as a proton) e)Chloride ion attacks carbon 2 (C2) f)The 2-methyl group leaves to create a carbocation g)As the pi electrons attack the H of HCl (which adds the H to C2), the Cl attacks C3 in a 4-center, 4-electron process. h)As the pi electrons attack the H of HCl (which adds the H to C3), the Cl attacks C2 in a 4-center, 4-electron process.
Answers
The pi electrons of the double bond attack the H of HCl (and the H-to-Cl bond cleaves); this attack adds the H to C3 and creates a carbocation at C2.
The correct answer is, A.
In the addition reaction of HCl to 2-methyl-2-butene, the first mechanistic step involves the pi electrons of the double bond attacking the H of HCl. This attack causes the H-to-Cl bond to cleave, resulting in the addition of the H to C3 and the creation of a carbocation at C2. This is a common first step in the addition of a hydrogen halide to an alkene or alkyne.
In this reaction, the pi electrons of the double bond between C2 and C3 in 2-methyl-2-butene attack the hydrogen atom in HCl, causing the H-to-Cl bond to break. This results in the addition of the hydrogen atom to C2, creating a carbocation at C3. The carbocation is more stable at C3 due to the methyl group on C2, which provides extra stability through hyperconjugation. The next step in the mechanism would involve the nucleophilic attack of the chloride ion on the carbocation at C3.
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Which statement about atoms is false ?
Answers
Answer:
Following Statement is false: Atoms have an overall negative charge
Explanation:
hope it helps
N₂ + H₂=NH3
What volume of hydrogen is necessary to react with 8.0 L of nitrogen to produce ammonia at STP?
Answers
The rate of concentration change for hydrogen in the reaction N2 + 3H2 +NH3 is -0.3x10-4 Ms-1.
What is the limiting reactant of N2 3H2 --> NH3?N2(g)+3H2(g) NH3 (g) If equal amounts of each reactant are utilised, hydrogen will be the limiting agent because it takes 3 moles of hydrogen to produce 1 mole of ammonia.The mole ratio for ammonia and nitrogen gas is 2:1, as illustrated by the chemical equation for ammonia generation in figure 1.NPC:N Ratio Calculation in a Parenteral Nutrition Tutorial. Following are the calculations for the nonprotein kcalorie to nitrogen ratio (NPC:N): Calculate the amount of nitrogen you consume each day (1 g N = 6.25 g protein). Subtract grammes of nitrogen from the overall nonprotein kcals. It is the ratio of a substance's mass of carbon to nitrogen (in this case, soil).To learn more about change refer to:
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An empty paper cup is the same temperature as the air in the room. A student fills the cup with cold water. Which of the following describes how thermal energy is transferred?
Answers
Answer:
Thermal energy is transferred from the cup to the cold water until they are at the same temperature
Explanation:
The second law of thermodynamics states that the entropy of an isolated system can only remain constant or increase, and will have a decreased potential energy than its initial state and also indicating that heat, or thermal energy, can only spontaneously flow from a hotter body to a colder body so as to attain thermal equilibrium
Therefore since the cup and the water form a thermodynamic system, with water being the colder body and the cup being the relatively hotter body, thermal energy can only be transferred from the cup to the cold water until they both reach thermal equilibrium or until they are at the same temperature.
IF U HAAD THEE RIGHHT ANSWERRR PLZZZ
- Which of the following is NOT part of Dalton's atomic theory?
A) Atoms are the smallest, indivisible particles in nature.
B) Chemical reactions are simple rearrangements of atoms.
C) Atoms follow the law of multiple proportions.
D) Each atom of an element is identical to every other atom of that element. b
Answers
Answer:A
Explanation: I’m pretty sure
4. can a gas ever have zero volume? what conditions would it take to create that situation? use one of the gas laws to support your hypothesis.
Answers
No, a gas can never have zero volume. Even if it has no pressure and the lowest possible temperature (-273.15°C), it will still occupy some space.
A gas is a state of matter that lacks a fixed shape and volume, meaning that it can change shape and occupy the entire volume of its container. Furthermore, its molecules are spaced out and move quickly, freely, and randomly in all directions.Gas law to support the hypothesis
As per Gay-Lussac's Law of Gases, there are no gases with zero volume. According to the law, when the volume of a gas is decreased at a constant temperature, its pressure increases proportionally. It implies that the gas molecules cannot be compressed into a zero-volume state. Even when subjected to the lowest possible temperature and pressure, the gas particles will still occupy some space.
The temperature of the gas would have to be reduced to absolute zero (-273.15°C), which is unattainable, to come close to zero volume.
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Fe2O3(s) +
_CO(g) - Fe(l) +
_CO2(g)
Balanced?
Answers
you run the reaction but forget to monitor by tlc. what other observation(s) could you use to suggest that the reaction is complete? you run the reaction but forget to monitor by tlc. what other observation(s) could you use to suggest that the reaction is complete? the solution turns green the solids in the vial dissolved no more brown gas is being produced crystals formed when the vial was cooled down
Answers
Although TLC is a useful method for monitoring reactions, other observations like color changes, dissolution of solids, gas production, and crystal formation can also provide valuable information about a reaction's completion.
If you forget to monitor a reaction using TLC, there are other observations you can rely on to suggest that the reaction is complete. These observations may include color changes, dissolution of solids, gas production, and crystal formation.
First, a color change in the solution can indicate a reaction's progress. In this case, the solution turning green might signify a reaction completion. Chemical reactions often involve the formation or breakdown of compounds, which can result in a change in the solution's color.
Second, the dissolution of solids in the vial can be another sign. If all solids have dissolved, it could mean that the reactants have reacted completely and formed the desired product(s) in the solution.
Third, monitoring gas production can provide valuable information about the reaction. If you observe no more brown gas being produced, it could suggest that the gas-producing reactants have been used up, and the reaction is complete.
Lastly, crystal formation when the vial is cooled down can be an indication of product formation. Crystals can form when the reaction is complete, and the product(s) precipitate out of the solution as the temperature decreases.
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A molecule of methane absorbs much more infrared energy than a
molecule of carbon dioxide.
True/False
Answers
The given statement "A molecule of methane absorbs much more infrared energy than a molecule of carbon dioxide" is false.
Infrared energy absorption depends on the molecular structure and the presence of specific bonds or functional groups within a molecule. Carbon dioxide (CO2) has a linear structure with two polar bonds (C=O), while methane (CH4) has a tetrahedral structure with four nonpolar bonds (C-H).
Molecules that have polar bonds or functional groups with dipole moments tend to absorb infrared radiation more strongly because their bonds can undergo vibrational and rotational modes that interact with infrared energy. Carbon dioxide, with its polar bonds, has specific vibrational modes that absorb infrared radiation in the atmosphere, contributing to the greenhouse effect. On the other hand, methane, with its nonpolar bonds, does not have strong infrared absorption characteristics compared to carbon dioxide.
Therefore, a molecule of carbon dioxide absorbs more infrared energy than a molecule of methane, contrary to the statement.
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Mizan cooks meat and he finds that the cooked meat is slow to cook. How do he speed up the cooking perfectly? (8marks)
Answers
Answer:
by heating it on. high fire makes it fast to coook meat
what is the wavelength (in nm) of blue light that has a frequency of 6.69 × 10¹⁴ s⁻¹? (c = 3.00 × 10⁸ m/s)
Answers
The wavelength of the blue light is approximately 448 nm.
The speed of light (c) is related to the wavelength (λ) and frequency (ν) of light by the equation: c = λν.
Given:
Frequency of the blue light (ν) = 6.69 × 10¹⁴ s⁻¹Speed of light (c) = 3.00 × 10⁸ m/sWe can rearrange the equation to solve for wavelength:
λ = c / ν
Substituting the given values:
λ = (3.00 × 10⁸ m/s) / (6.69 × 10¹⁴ s⁻¹)
To convert meters (m) to nanometers (nm), we multiply by a conversion factor of 10⁹ nm/m.
λ = [(3.00 × 10⁸ m/s) / (6.69 × 10¹⁴ s⁻¹)] * (10⁹ nm/m)
λ = 448 nm
Therefore, the wavelength of the blue light is approximately 448 nm.
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A 52-kg woman has 7.2 x 10-mol of hemoglobin (molar mass =
64456 g/mol ) in
her blood. How many hemoglobin molecules is this?
Answers
There are 6.022 x 1023 molecules per mole (Avogadro's number). As there are 7.2 x 10-3 moles of hemoglobin, the number of hemoglobin molecules would be 6.022 x 1023 molecules/mole x 7.2 x 10-3 moles = 4.3 x 1021 molecules
A 52-kg woman has 7.2 x 10 mol of hemoglobin in her blood. The quantity of hemoglobin molecules is 4.3 x 10²¹ molecules.
What is hemoglobin?Red blood cells include the protein hemoglobin, which transports oxygen to your body's organs and tissues, and carbon dioxide from those tissues back to your lungs.
You have a low red blood cell count if a hemoglobin test finds that your hemoglobin level is lower than normal (anemia).
Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound.
There are 6.022 x 1023 molecules per mole (Avogadro's number).
As there are 7.2 x 10⁻³ moles of hemoglobin, the number of hemoglobin molecules would be 6.022 x 10²³ molecules/mole x 7.2 x 10⁻³ moles = 4.3 x 1021 molecules.
Therefore, the number of hemoglobin molecules is 4.3 x 10²¹ molecules.
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which molecules can form a hydrogen bond with another identical molecule? hooh ch2ch2nh2 hi sih4 ch3ch2f
Answers
The molecules that can form hydrogen bonds with another identical molecule are HOOH (hydrogen peroxide), CH₃CH₂NH₂(ethylamine), and CH₃CH₂F (ethyl fluoride).
Hydrogen bonding occurs between a hydrogen atom bonded to an electronegative atom (such as oxygen, nitrogen, or fluorine) and another electronegative atom in a different molecule. Based on this criterion, the molecules that can form hydrogen bonds with another identical molecule are:
HOOH (Hydrogen peroxide): The oxygen atom in one molecule can form a hydrogen bond with the hydrogen atom in another molecule.CH₃CH₂NH₂ (Ethylamine): The nitrogen atom can form a hydrogen bond with the hydrogen atom in another ethylamine molecule.CH₃CH₂F (Ethyl fluoride): The fluorine atom can form a hydrogen bond with the hydrogen atom in another ethyl fluoride molecule.Learn more about Hydrogen Bond
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0.2 g of sand in two-third of little of a liquor for Ethanol . What is the concentration in g per dm cube
Answers
The concentration of the solution in g per dm cube is 35.24 g/dm cube.
The amount of sand in grams is 0.2 g and the volume of the solution is two-thirds of a litre. We have to find the concentration of the solution in g per dm cube.To find the concentration of the solution in g per dm cube, we need to know the concentration of ethanol. As the concentration of ethanol is not given in the question, let us assume the concentration of ethanol is 100%. Therefore, the volume of ethanol in the solution is
(1 - 2/3) litres= 1/3 litres= 1000/3 mL.
As the density of ethanol is 0.789 g/mL,
the mass of ethanol in the solution is:
0.789 g/mL × 1000/3 mL= 789/3 g
The mass of the solution is:
789/3 g + 0.2 g= 2367/9 g
The volume of the solution in dm cube is:
2/3 L= 0.67 dm cube
The concentration of the solution in g per dm cube is: (2367/9 g)/(0.67 dm cube)≈ 35.24 g/dm cube.
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The chemicals that are present before a reaction occurs are called _____, and the chemicals produced from the reaction are called _____.
Answers
Answer: Reactants-Products
If 62.6 grams of lead (II) chloride is produced, how many grams of lead (II) nitrate were reacted ?
Answers
74.5 grams of lead (II) nitrate were reacted to produce 62.6 grams of lead (II) chloride.
To determine the mass of lead (II) nitrate that was reacted when 62.6 grams of lead (II) chloride is produced, we need to use the stoichiometry of the balanced chemical equation and calculate the molar masses of the compounds involved.
The balanced chemical equation for the reaction is:
2Pb(NO3)2 + 2NaCl → 2PbCl2 + 2NaNO3
From the equation, we can see that 2 moles of Pb(NO3)2 react to produce 2 moles of PbCl2. Therefore, the molar ratio of Pb(NO3)2 to PbCl2 is 1:1.
First, let's calculate the molar mass of PbCl2 and Pb(NO3)2:
Molar mass of PbCl2 = Atomic mass of Pb + 2 × Atomic mass of Cl
= 207.2 g/mol + 2 × 35.45 g/mol
= 278.1 g/mol
Molar mass of Pb(NO3)2 = Atomic mass of Pb + 2 × (Atomic mass of N + 3 × Atomic mass of O)
= 207.2 g/mol + 2 × (14.01 g/mol + 3 × 16.00 g/mol)
= 331.2 g/mol
Next, we can calculate the moles of PbCl2 produced:
Moles of PbCl2 = Mass of PbCl2 / Molar mass of PbCl2
= 62.6 g / 278.1 g/mol
≈ 0.225 mol
Since the molar ratio of Pb(NO3)2 to PbCl2 is 1:1, the moles of Pb(NO3)2 reacted will also be 0.225 mol.
Finally, to find the mass of Pb(NO3)2 that was reacted, we can use the moles and molar mass:
Mass of Pb(NO3)2 = Moles of Pb(NO3)2 × Molar mass of Pb(NO3)2
= 0.225 mol × 331.2 g/mol
≈ 74.5 g
Therefore, approximately 74.5 grams of lead (II) nitrate were reacted to produce 62.6 grams of lead (II) chloride.
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Which member of the alkali metals has the highest
electronegativity?
A)Na
B)Cs
C)Fr
D)Rb
E)Li
F)K
Answers
Answer:
E)Li
Explanation:
Electronegativity is the tendency of an atom to attract a pair of bonding electrons. In the periodic table, electronegativity increases across the period and decrease down the group.
This means the element at the top of the group would have the highest electronegativity.
The correct option is;
E)Li