How many molecules of carbon dioxide are in 12.2 L of the gas at STP?
Answers
Answer:
Converting Between Moles and Liters of a Gas at STP. To convert between moles and the volume of a gas at STP, we will use the factor label method discussed in the first unit. This conversions relies on the fact that a mole of gas at STP has a volume of 22.4 L.
Explanation:
One molecule of carbon dioxide at STP has a volume of 22.4 liters . Thus number of molecules of carbon dioxide in 12.2 L is 3.27 × 10²³ molecules.
What is one molecule?A molecule is formed by the combination of same or different kinds of atoms. A number molecules together form a compound. Water, carbon dioxide etc. are compounds.
One mole of a molecule contains 6.022 × 10²³ number of atoms. Similarly, one mole of a compound contains, 6.022 × 10²³ number of molecules.This number is called Avogadro number.
At standard temperature and pressure (STP) that is at 298 K and 1 atm pressure, one mole of any substance carry 22.4 L. Thus number moles of 12.2 L of carbon dioxide is 12.2 / 22.4 = 0.54 moles.
Number of molecules = 0.54 moles × 6.022 × 10²³
= 3.27 × 10²³
Hence, number of molecules of carbon dioxide in 12.2 L is 3.27 × 10²³ molecules.
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Related Questions
someone help!! correct the ones I got wrong please put the # so I can know which one you guys talking about please.
Answers
Answer:
6. physical
Explanation:
what is the pressure (in atm) on a surface 20.0 ft under water, if the atmospheric pressure is 1.023 atm, and the densities of water and mercury are 1.00 and 13.6 g/ml, respectively?
Answers
The pressure (in atm) on a surface 20.0 ft underwater, if the atmospheric pressure is 1.023 atm, and the densities of water and mercury are 1.00 and 13.6 g/ml, respectively is 1.067 atm
What is the pressure (in atm) on a surface 20.0 ft underwater?Generally, The pressure on a surface under water is equal to the atmospheric pressure plus the pressure due to the weight of the water above the surface.
To calculate the pressure due to the weight of the water, we need to know the depth of the surface under water and the density of the water.
Since the atmospheric pressure is 1.023 atm, and the density of water is 1.00 g/ml, the pressure on the surface 20.0 ft under water is given by:
Pressure = 1.023 atm + (depth * density of water * acceleration due to gravity)
= 1.023 atm + (20.0 ft * 1.00 g/ml * 32.2 ft/s^2)
= 1.023 atm + 644.4 lb/ft^2
= 1.023 atm + 44.6 psi
= 1.067 atm
So the total pressure on the surface 20.0 ft under water is 1.067 atm.
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When investigating whether or not the substance dibromoethane (ethylene dibro- mide) is carcinogenic, we follow the survival history of 161 white employees of 2 factories who were exposed to dibromoethane. Among them, we observe 7 can- cer deaths in the period 1940-1975. On the other hand, the mean number of cases over that period in that general population is expected to be 5.8. Do those 7 cases provide a reason to consider the substance as carcinogenic?
Answers
When investigating whether or not the substance dibromoethane (ethylene dibromide) is carcinogenic, we follow the survival history of 161 white employees of 2 factories who were exposed to dibromoethane.
Among them, we observe 7 cancer deaths in the period 1940-1975. On the other hand, the mean number of cases over that period in that general population is expected to be 5.8. Do those 7 cases provide a reason to consider the substance as .Yes, the seven cases provide a reason to consider the substance dibromoethane as carcinogenic.
Since the number of cancer deaths observed in the 161 white employees exposed to dibromoethane is 7 which is greater than the expected cancer deaths in the general population, which is 5.8. Therefore, the excess cases may suggest that dibromoethane has some carcinogenic potential.
Hence, we can consider dibromoethane as carcinogenic.
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What are the chances of the offspring being heterozygous for tall plant?
Answers
There are 50% chances of the offspring being heterozygous for tall plant.
Crossing homozygous short tt plants with heterozygous tall Tt plants yields short to tall plants in a 1:1 ratio. So the seed has a 50% chance of growing into a large plant.
Under such conditions, the dominant allele is always expressed and the recessive allele is masked. In this example, the size allele is dominant, so the plant grows.
About 80% of an individual's height is determined by differences in their inherited DNA sequences.
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. If the half-life of cesium-133 is 30 years, how much of a 600g sample of cesium-133 will be left after
150 years
Answers
Answer:
Caesium (55Cs) has 40 known isotopes, making it, along with barium and mercury, one of the elements with the most isotopes. The atomic masses of these isotopes range from 112 to 151. Only one isotope, 133Cs, is stable. The longest-lived radioisotopes are 135Cs with a half-life of 2.3 million years, ... It constitutes most of the radioactivity still left from the Chernobyl accident ...
Which number is equal to the number of protons in the atom
Answers
Answer:
The number of electrons is equal to the number of protons
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the electrons number is equal to the number of protons in the atom.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. In an atom, the number of electron or atomic number is s equal to the number of protons in the atom.
Therefore, the electrons number is equal to the number of protons in the atom.
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s 6 hno3 --> h2so4 6 no2 2 h2o in the above equation how many moles of water can be made when 96.00 moles of hno3 are consumed?
Answers
The balanced equation states that for every 6 moles of HNO3 consumed, 2 moles of H2O are produced.
In this case, we are given that 96.00 moles of HNO3 are consumed in the reaction. To find the number of moles of H2O produced, we can use the stoichiometry of the balanced equation. We know that for every 6 moles of HNO3 consumed, 2 moles of H2O are produced. Therefore, we can use the proportion: 2 moles H2O/ 6 moles HNO3 = x moles H2O / 96.00 moles HNO3. Solving for x gives: x = (2 * 96.00) / 6 = 16 moles of H2O are produced when 96.00 moles of HNO3 are consumed. It's important to note that the balanced equation provides the stoichiometry of the reaction which helps us to calculate the number of moles of product produced from the given number of moles of reactant. The balanced equation also tells us that the reaction is stoichiometrically balanced and the number of moles of reactant and product are in a defined ratio.
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What is the elevation of point B?
Answers
PLEASE HELP!!! WILL GIVE BRAINLIESTTTT
A piece of wood has a mass of 2.85 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the density of this piece of wood?
_______ Answer _______Units
Answers
Answer:
d = 0.84 g/cm³
Explanation:
Given data:
Mass of wood = 2.85 g
Volume of water = 20.0 mL
Volume of water + wood = 23.4 mL
Density of wood = ?
Solution:
Volume of wood = (Volume of water + wood ) - Volume of water
Volume of wood = 23.4 mL - 20.0 mL
Volume of wood = 3.4 mL
1 mL = 1 cm³
Density of wood:
d = m/v
d = 2.85 g / 3.4cm³
d = 0.84 g/cm³
How many molecules are in 83.2 g of chlorine gas (Cl2)?
Group of answer choices
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Answers
Answer:
try all of them
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Explanation:
A chemist has synthesized two new dyes based on the molecular structure of plant-based dyes. The lowest energy absorption line for the first dye is light in the visible region at 530 nm. The lowest energy absorption line for the second dye is light in the visible region at 645 nm. Based on this evidence, which molecule has the larger homo-lumo gap?.
Answers
The molecule that has the highest HOMO - LUMO gap is the dye with absorption maxima at 530 nm.
What is the homo-lumo gap?We know that the term HOMO stands for the highest occupied molecular orbital while the LUMO stands for the lowest unoccupied molecular orbital of the molecule that is under consideration.
The HOMO - LUMO gap shows us the extent to which it is possible to have the electrons that in a conjugated system being promoted from the HOMO to the LUMO and this is also a measure of the degree of conjugation in the molecule.
Recall that when the wavelength is longer, it implies that the frequency is higher and that the LUMO - HOMO gap is not as wide. If the reverse is the case, then implies that the HOMO - LUMO gap is quite wide as is evident from what we have in the question as shown.
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Newton said, “If I have seen further than others, it is by standing upon the shoulders of giants.” Explain the meaning of this quotation.
Answers
i have an unknown elongate crystal. they develop a charge on each end when subject to heat. the uncut crystals are often multicolored with rounded triangular terminations. a chemical analysis shows the crystals are a silicate mineral that contains boron (b). the crystals are:
Answers
Based on the information provided, it is possible that the elongated crystals are tourmaline.
Tourmaline is a silicate mineral that contains boron, and it is known for its pyroelectric properties, meaning it can develop a charge on its ends when subject to heat or pressure. Tourmaline crystals can have a variety of colors and often have triangular terminations that are rounded or pointed. Tourmaline crystals are also known for their elongate and sometimes cylindrical shape, which could fit the description of the unknown crystals in question. However, without further information or analysis, it is difficult to definitively identify the crystals as tourmaline.
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uh id.k how to fill this out, i mean the type of reaction part is obvious but id.k what to put in the box and the other blue part.
Answers
Answer:
Explanation:
Strontium chlorate appears as a moist solid or semi-solid slurry of white crystals. May explode under exposure to heat or fire. Used in pyrotechnics
strontium chlorate | Sr(ClO3)2 - PubChem.
Description: Strontium chlorate appears as a ...
Synonyms: STRONTIUM CHLORATE7791-10-...
Molecular Formula: Sr(ClO3)2 or Cl2O6Sr
If ice has a density of 0.92 g/ml what is the volume of 5,000g of ice?
Answers
Answer:
The answer is 5,434.8 cm^3
The volume corresponding to 5,000 g of ice with a density of 0.92 g/mL is 5.4 × 10³ mL.
The density (ρ) is an intrinsic property of matter. It is equal to the quotient between the mass (m) and the volume (V). If we have 5,000 g of ice with a density of 0.92 g/mL, its volume is:
\(\rho = m/V\\V = m/\rho = 5,000 g/(0.92 g/mL) = 5.4 \times 10^{3} mL\)
The volume corresponding to 5,000 g of ice with a density of 0.92 g/mL is 5.4 × 10³ mL.
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the quantity of an organic acid present in a sample can be found by measuring the quantity of sodium hydroxide that is needed to neutralize the organic acid. group of answer choices true false
Answers
The statement is true, because,The quantity of an organic acid present in a sample can be found by measuring the quantity of sodium hydroxide that is needed to neutralize the organic acid.
This is done by performing a neutralization reaction between the organic acid and the sodium hydroxide, and then measuring the amount of sodium hydroxide that was used.
A neutralization reaction is a chemical reaction that occurs when an acid and a base react to form a salt and water. In this case, when an organic acid and sodium hydroxide react, the hydrogen ions in the acid are replaced by the sodium ions in the base, resulting in the formation of a salt and water.
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Count the atoms in the following chemical equation
C25H52+38 O2→25 CO2+26 H2O
Atoms
Reactant Side
Product Side
Carbon
Hydrogen
Oxygen
Total
The law of conservation of mass says that mass can’t be ________________ or _______________.
Answers
Answer:
The answer to the last part is- the law of conservation of mass says mass can't be created or destroyed
A student prepares four different aqueous NaCl solutions according to the table. Which solution will have the highest molarity?
Answers
Brainly is erroneously blocking my answer from being posted due to nonexistent profanity and/or links, so I have attached an image of my written response. Please let me know if you have any problems seeing it.
1.Which one of the following is not isoelectronic with the others: Cl-, Na+, S2-, Ca2+, Ar 2. a.Explain why ionization of N is higher than ionization of O. b. and why ionization of P is higher than ionization of S.
Answers
Isoelectronic refers to the atoms, ions, or molecules having the same number of electrons. Cl-, Na+, S2-, and Ca2+ are isoelectronic, but Ar has 18 electrons while others have 17 electrons. Therefore, Ar is not isoelectronic with the others.
2.
a. Explain why the ionization of N is higher than the ionization of O.
Ionization energy is the minimum amount of energy required to remove an electron from the atom or ion. Ionization energy depends on the number of electrons, distance between the nucleus and outermost shell and the shielding effect of inner electrons.
Nitrogen has one less electron than oxygen, so its electrons are held closer to the nucleus which increases the effective nuclear charge. So, it is easier to remove an electron from O than from N. Hence, the ionization energy of N is higher than the ionization energy of O.
b. Explain why ionization of P is higher than ionization of S.
Phosphorus has one less electron than sulfur, so its electrons are held closer to the nucleus which increases the effective nuclear charge. So, it is easier to remove an electron from S than from P.
Hence, the ionization energy of P is higher than the ionization energy of S.
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If light has a frequency of 4.74 x 10 to the 11th power Hz. what is the wavelength of the light?
Answers
Answer:
Wavelength = 6.33 × 10⁻⁴ m
Explanation:
We must use the formula:
Wave speed (v) = Frequency (f) × Wavelength (λ)
All electromagnetic waves have a speed of 3.0 × 10⁸ m/s
So substitute the values into the formula.
3.0 × 10⁸ = 4.74 × 10¹¹ × λ
λ = (3.0 × 10⁸) ÷ (4.74 × 10¹¹)
λ = 6.33 × 10⁻⁴ m
Which type is a metamorphic rock formed from shale?
A.gneiss
B.limestone
C.sandstone
D.slate
Answers
Answer:
Slate
Explanation:
I answered all of the previous questions, but I'm not sure I understand questions 4 and 5, so I'm hoping you can assist me.
Answers
For 2. Look up what bonds the elements make when combined.
For 3. Look up the detention of the bond.
I hope this helps!
Calculate the pH of a polyprotic acid given and sketch the titration curves for the following reaction:
A 20.0-mL aliquot of 0.100M of a tartaric acid with 0.100M NaOH
pKa1 = 2.3 pKa2= 4.3
Answers
The pH of the tartaric acid solution before titration can be calculated using the Henderson-Hasselbalch equation. With a 20.0 mL aliquot of 0.100 M tartaric acid and pKa1 = 2.3, the pH is approximately 2.88.
The pH of the tartaric acid solution before titration can be calculated using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]). Since we have only the tartaric acid, the concentration of the conjugate base [A-] is 0. With a pKa1 of 2.3, substituting the values gives us pH ≈ 2.88. This pH represents the initial acidity of the tartaric acid solution. During titration, as NaOH is added, the pH will change based on the neutralization of acidic protons. The titration curve will show pH changes at specific volumes of NaOH added, reflecting the stepwise deprotonation of the acid.
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Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?
Answers
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
Answer:
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water
Explanation:
assuming both forward and reverse reactions are elementary processes, which reaction has the larger rate constant: the forward or the reverse reaction? match the words in the left column to the appropriate blanks in the sentences on the right.
Answers
If the equilibrium constant (Kc) has a value of 3.1 × 10⁻⁴ (which is much less than one), we would expect the rate constant (k) to be larger than kr.
Matching the words to the appropriate blanks:
smaller Kc: much less than one
k: larger
kr: much more than zero
Assuming both the forward and reverse reactions are elementary reactions, we can make some general observations about the relationship between the rate constants (k and kr) and the equilibrium constant (Kc).
The equilibrium constant (Kc) is related to the rate constants of the forward (k) and reverse (kr) reactions through the equation:
Kc = k/kr
Comparing the values, we can draw the following conclusions:
If Kc is much less than one (<<1), then the value of k is larger than kr. This implies that the forward reaction is faster than the reverse reaction, leading to a higher rate constant (k) compared to kr.
If Kc is much larger than one (>>1), then the value of kr is larger than k. This implies that the reverse reaction is faster than the forward reaction, resulting in a higher rate constant (kr) compared to k.
If Kc is much closer to one, there is no definitive conclusion about the relationship between the rate constants. We would need specific numerical values of Kc, k, and kr to make further determinations.
Therefore, based on the given information, if the equilibrium constant (Kc) has a value of 3.1 × 10⁻⁴ (which is much less than one), we would expect the rate constant (k) to be larger than kr.
Matching the words to the appropriate blanks:
smaller Kc: much less than one
k: larger
kr: much more than zero
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whas the difference between an element, molecule and compound
Answers
Answer: element is a sotce
Explanation:
How can you show using Pauli's exclusion principle that p sub shell can have only 6 electrons?
Answers
where l = subshell value.
"l"values of subshell are.
s = 0.
p = 1.
d = 2.
f = 3.
So in p orbital we have 6 electrons.
What property of water accounts for its ability to insulate areas around it?
Answers
Answer:
Floating ice can insulate bodies of water. Answer: b. Discuss how a high specific heat helps to buffer temperature for organisms. Water's high specific heat is important to life because...
Explanation:
The solubility product for pbl, is 8.49 x 10" (298 k). calculate the solubility of pbly in g per 100g of water.
Answers
The solubility of PbI2 in grams per 100 grams of water is approximately 2.005 x 10⁻³ grams by using solubility product, Ksp = [Pb2+][I-]²
The solubility product (Ksp) expression for the equilibrium of a sparingly soluble salt, such as PbI2, can be written as follows:
Ksp = [Pb2+][I-]²,
where [Pb2+] represents the concentration of Pb2+ ions and [I-] represents the concentration of I- ions in the saturated solution.
To calculate the solubility of PbI2, we need to assume that the solubility of the compound is "x" grams per 100 grams of water. This means that the concentration of Pb2+ and I- ions will also be "x" grams per 100 grams of water.
Using the Ksp expression, we can substitute these values and write the equation as:
8.49 x 10⁻⁹ = (x)(x)²,
which simplifies to:
8.49 x 10⁻⁹ = x³.
Taking the cube root of both sides, we find:
x = (8.49 x 10⁻⁹)¹/³.
Evaluating the right-hand side of the equation, we obtain approximately 2.005 x 10⁻³.
Therefore, the solubility of PbI2 in grams per 100 grams of water is approximately 2.005 x 10⁻³ grams.
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Hypothesis: In this section, please include the if/then statements you developed during your lab activity.These statements reflect your predicted outcomes for the experiment. You must use 1 metal and 2 non-metals for each combination. Note: There are only 14 possible combinations for this practice activity. If I use __________, _________________, and ________________, then I can make ___ new compounds in five minutes.
Answers
If you use Copper (Cu) as the metal , Oxygen (O) and Carbon (C) as the c, then you can make 2 new compounds in five minutes.
The two possible compounds are:
Copper oxide (CuO)Copper carbide (Cu2C)What is Copper oxide (CuO)?Copper oxide (CuO) is a chemical compound composed of copper and oxygen. It is a black, solid material with a high melting point and is commonly referred to as cupric oxide or black oxide of copper.
CuO can be produced by heating copper in the presence of oxygen, or by reacting copper sulfate with sodium hydroxide. It is commonly used as a raw material in the production of copper salts, in the manufacturing of ceramics, as a pigment, and as a catalyst in various chemical reactions.
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