Answers
2.50 x 10^23 molecules of C4H6 contains 1.25 x 10^23 moles of C4H6.
What do you mean by moles?
Moles are a unit of measurement used to quantify the amount of a substance. They represent the amount of a substance, measured in terms of the number of atoms, molecules, ions, or other particles present in a given sample. For example, one mole of carbon atoms equals 12 grams of carbon.
To calculate this, we use the equation:
Moles = (Number of molecules) / (Avogadro's number)
Moles = (2.50 x 10^23 molecules) / (6.02 x 10^23 molecules/mole)
Moles = 1.25 x 10^23 moles.
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Related Questions
when two or more compounds are jointed together ?
Answers
Answer:
When two or more atoms join together, we call it a molecule. When two or more atoms of different elements join together, we call it a compound. All compounds are molecules, but not all molecules are compounds.
Explanation:
Answer:
all compounds are molecules
Explanation:
A sample of nitrogen gas occupies a volume of 255 mL at 0.974 atm pressure. what volume will it occupy at 1.05 atm pressure?
Answers
The sample of nitrogen gas will occupy 236.54 mL of volume at 1.05 atm pressure.
Give a brief account on Boyle's Law.Boyle's law is the ideal law that defines the relationship between pressure and volume of gases. A law is given if the temperature is kept constant. Pressure and volume exhibit an inverse relationship.
The Boyle's Law is given as:
P₁V₁ = P₂V₂
Given,
Initial pressure (P₁) = 0.974 atm
Initial volume (V₁) = 255 mL
Final pressure (P₂) = 1.05 atm
Final volume = V₂
The final volume at 1.05 atm is calculated by substituting values in Boyle's Law as:
P₁V₁ = P₂V₂
0.974 × 255 = 1.05 V₂
V₂ = 248.37 ÷ 1.05
= 236.54 mL
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Which of these correctly lists the order of the engineering process?
A. Identify a need, research the background, make a plan, do the
work, evaluate the results, look for improvements.
B. Produce a product, improve it, identify a problem, make a solution,
test the solution.
C. Make a solution, identify a problem, research the problem, test the
Answers
Answer:
B
Explanation:
produce a product improve it identify a problem make a solution
Answer: A
Explanation: i just put b and it was wrong and A is the answer
A student rode their bike for a 3 hour period. During that time, she covered 60 km. What was the average speed?
Answers
Using dimensional analysis write the dimension of pressure with its unit
Answers
The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa
Pressure is defined as the force per unit area. It can be represented using dimensional analysis by considering the fundamental units of force and area. Force is represented by the fundamental unit of mass (kg) multiplied by the fundamental unit of acceleration (m/s²). Therefore, the dimension of force is [kg·m/s²]. Area is represented by the fundamental unit of length (m) squared. Therefore, the dimension of area is [m²]. To determine the dimension of pressure, we divide the dimension of force by the dimension of area: [Pressure] = [Force] / [Area] = [kg·m/s²] / [m²]
Simplifying the expression, we can cancel out the common unit of length:
[Pressure] = [kg/s²·m] The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa Therefore, the dimension of pressure is [kg/s²·m] and its unit is the Pascal (Pa).
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Suppose you want to create a 6 ng/μL solution in a 25 mL volumetric flask. However, this concentration cannot really be accurately prepared in a single step due to the small amount of mass that would need to be measured. Therefore, you decided to conduct this as a two step process. You will create a high concentration stock solution in one 10 mL flask. You then transfer 0.1 mL into a second 25 mL volumetric flask that will be the concentration of 6 ng/μL. What is the mass of chemical you need to add to the stock flask to achieve the desired concentration after dilution?
Answers
Answer:
Mass of chemical = 1.5 mg
Explanation:
Step 1: First calculate the concentration of the stock solution required to make the final solution.
Using C1V1 = C2V2
C1 = concentration of the stock solution; V1 = volume of stock solution; C2 = concentration of final solution; V2 = volume of final solution
C1 = C2V2/V1
C1 = (6 * 25)/ 0.1
C1 = 1500 ng/μL = 1.5 μg/μL
Step 2: Mass of chemical added:
Mass of sample = concentration * volume
Concentration of stock = 1.5 μg/μL; volume of stock = 10 mL = 10^6 μL
Mass of stock = 1.5 μg/μL * 10^6 μL = 1.5 * 10^6 μg = 1.5 mg
Therefore, mass of sample = 1.5 mg
Give the structures of the free‑radical intermediates in the peroxide‑initiated reaction of HBr
with the following alkene. Include all lone‑pair electrons and unpaired electrons. Hint: the radicals do not coexist in the same mechanistic step.
Answers
The peroxide addition would yield a product that is different from the antiperoxide addition
What is the structure?Markovnikov's rule states that when a protic acid HX is added to an alkene, the acid hydrogen (H) forms a bond with the carbon atom that has the greatest number of hydrogen atoms, while the halide (X) group forms a bond with the carbon atom that has the fewest hydrogen atoms.
This can be summed up with the phrases "the rich get richer" and "the poor get poorer" in terms of hydrogen. This fundamental principle of alkene chemistry aids in predicting the results of addition reactions.
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1. Nene geese in Hawaii are endangered because of
O pollution exotic species
O poaching
O habitat destruction
Answers
Answer:
✔ habitat destruction
Explanation:
the 3 reasons are:
hunting
habitat loss
introduced predators
summed up its habitat destruction
Write an equation that shows the formation of a barium ion from a neutral barium atom.
Answers
Answer:
Ba -> Ba2+ + 2e-
Explanation:
A neutral atom becomes an iron when that atom loses electrons. The number of electroms lost by that atom determines the ionic charge or charge of it's ion. In this case, a neutral Barium atom (Ba) will become a barium ion, which has a charge of +2, when it loses 2 electrons to a more electronegative atom in a reaction.
The equation is:
Ba -> Ba2+ + 2e-
2e- is the two electrons lost
homogenous and heterogenous catalyst1- state the definition of each one. 2- describe in detail the mechanism of each one. 3- give example of 2 industrial uses per catalyst type with balanced equations for the reactions each catalyzes and the catalyst name.
Answers
1) Homogeneous catalysts are those that occupy the same phase as the reaction mixture (generally liquid or gas), while heterogeneous catalysts occupy a different phase. Normally, heterogeneous catalysts are solid compounds that are added to liquid or gas reaction mixtures.
Which of the following is the name given to a carbohydrate containing one monomer?
Disaccharide
Decasaccharide
Monosaccharide
Polysaccharide
Answers
Answer:
Disaccharide
Explanation:
When two monomers combine, a disaccharide is formed. Also, the prefix "di" is two therefore the answer must be a disaccharide
What is the net ionic equation for the reaction shown below?
Answers
A net ionic equation includes the ions that are involved in the formation of the solid.
In this case, the solid is silver chloride (AgCl). The ions that are involved are Ag+ and Cl-, then, the net ionic equation is:
\(Ag_{(aq)}^++Cl_{(aq)}^-\rightarrow AgCl_{(s)}\)It means that the correct answer is the last choice.
A cook prepares a solution for boiling by adding 12.5 g of NaCl to a pot holding 0.750 L of water. At what temperature should the solution in the pot boil? {Normal boiling point is 100oC and Kb = 0.512 oC kg/mol and density of water is 1 kg/L}
Thanks!!
Answers
Answer:A cook prepare a solution for boiling by adding 12.5g of NaCl to a pot holding 0.750L of water. ... 12.5g of NaCl to a pot holding 0.750L of water. At what temperature should the solution in the not boil? *. 1 ... Which of the following is best suited to be counted by moles a. roses in a store b. books in a library c.
Explanation:
You want to plate a steel part having a surface area of 240 with a 0.002--thick layer of silver. The atomic mass of silver is 107.868 . The density of silver is 10.49 . How many atoms of silver are required
Answers
This question is incomplete, the complete question is;
You want to plate a steel part having a surface area of 240 in² with a 0.002-in thick layer of silver.
The atomic mass of silver is 107.868 g/mol .
The density of silver is 10.49 g/cm³.
How many atoms of silver are required?
Answer:
4.6 × 10²³ atoms of silver are required
Explanation:
Given the data in the question;
first, we determine the volume of silver layer
volume of silver layer = surface area × thickness
we substitute
volume of silver layer = 240 in² × 0.002-in = 0.48 in³
we know that 1 in³ = 16.387 cm³
so, volume of silver layer = 0.48 × 16.387 = 7.87 cm³
Next we calculate mass of silver;
⇒ density × Volume
mass of silver = 10.49 g/cm³ × 7.87 cm³ = 82.5563 g
Now, number of atoms of silver are required will be;
Number of atoms = (mass/atomic mass) × Avogadro number
we know that A.v no. is 6.02214 × 10²³ mol⁻¹
so
Number of atoms = (82.5563 g / 107.868 g/mol . ) × 6.02214 × 10²³ mol⁻¹
= 0.7653 × 6.02214 × 10²³
= 4.6 × 10²³ atoms
Therefore; 4.6 × 10²³ atoms of silver are required
11. If
by substituting: one mole for one dozen; methane, CHE
molecules for elephants; 10,000 grams for 10,000 tons. -
Answers
Explanation:
if you follow me I will give your answer
What reaction would cause a decrease in entropy?
Answers
Answer:
B
Explanation:
liquids is produce therefore it will have the less Entropy
Answer:
B.
Explanation:
if the # of molecules (of gas) on the product side is less than # of molecules on the reactant side = entropy is decreasing, and vice versa.
if the # of molecules on the reactant side is less than # of molecules on the product side = entropy is increasing (it is more disorderly, chaotic)
A. 2 → 2 + 1 entropy increases
B. 1 + 4 → 1 + 1 entropy decreases
C. 2 → 1 + 3 entropy increases
D. 2 + 1 → 2 + 2 entropy increases
How many grams of lead will be produced if 2.54g of PbS is burned with 1.88g of O2? write the equation
Answers
If 2.54 g of PbS is burned with 1.88 g of O2, approximately 2.20 grams of Pb will be produced.
The balanced equation for the reaction of lead sulfide (PbS) with oxygen (O2) to produce lead (Pb) and sulfur dioxide (SO2) is as follows:
2PbS + 3O2 -> 2Pb + 2SO2
From the balanced equation, we can see that the stoichiometric ratio between PbS and Pb is 2:2 or 1:1. This means that for every 1 mole of PbS, 1 mole of Pb is produced.
To calculate the number of moles of PbS, we need to divide the given mass (2.54 g) by its molar mass:
Molar mass of PbS = 207.2 g/mol (Pb) + 32.07 g/mol (S) = 239.27 g/mol
Moles of PbS = 2.54 g / 239.27 g/mol = 0.0106 mol
Since the stoichiometric ratio between PbS and Pb is 1:1, the number of moles of Pb produced is also 0.0106 mol.
To calculate the mass of Pb, we multiply the number of moles by its molar mass:
Molar mass of Pb = 207.2 g/mol
Mass of Pb = 0.0106 mol x 207.2 g/mol = 2.20 g
This calculation is based on the stoichiometric ratio between PbS and Pb, where 1 mole of PbS produces 1 mole of Pb. By converting the given mass of PbS to moles and then multiplying by the molar mass of Pb, we can determine the mass of Pb produced.
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If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside the container in mmHg?
Answers
Answer:
n = 3.0 moles
V = 60.0 L
T = 400 K
From PV = nRT, you can find P
P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L
P = 1.642 atm = 1.6 atm (to 2 significant figures)
Explanation:
Determine the mass in grams of 5.83 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)
Answers
Answer: 0.725g
Explanation: mass = (5.83*10^21/6.02214076*10^23)*74.92 g = 0.725 g
An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which
statement describes the most likely result?
O The energy absorbed in the first move equals the energy released in the second move.
O The energy absorbed in the first move is greater than the energy released in the second move.
O The energy released in the first move equals the energy absorbed in the second move.
O The energy released in the first move is greater than the energy absorbed in the second move,
Answers
Answer:
The energy absorbed in the first move is greater than the energy released in the second move.
Explanation:
When the electron goes up levels it absorbs energy to enter that higher energy state. When it goes down, it releases energy but just not as much because 1-4 is more than 4-2.
What information does an acid or base equilibrium constant give?
Answers
The value of the equilibrium constant shows the relative amounts or concentrations of the reactants and products.
Which of the following best describes subduction?
a more dense plate going beneath a less dense plate
one plate colliding with another
one plate destroying another
one plate dividing another
Answers
Answer:
A more dense plate going underneath a less dense plate.
b. according to e.f. codd, who theorized the concept of the relational model, the actual value for the combination of attribute name and type must be atomic.
Answers
Yes, according to E.F. Codd, the relational model's founder, the values in a relational database must be atomic, which means indivisible and indestructible. This means that each attribute value,
must represent a single, indivisible unit of data and cannot be subdivided. This guarantees that each attribute value may be viewed as a distinct object and edited and processed as such. Along with domain independence and normalization, the idea of atomicity is one of the basic concepts of the relational model.This means that each attribute value must represent a single, indivisible unit of data and cannot be subdivided. This guarantees that each attribute value may be viewed as a distinct object and edited and processed as such. ccording to e.f. codd, who theorized the concept of the relational model, the actual value for the combination of attribute name and type must be atomic.
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Calculate the new pressure of a gas if the gas at 50 ˚C and 81.0 kPa is heated to 100 ˚C at a constant volume.
Answers
Answer:
93.5 kPa
Explanation:
Step 1: Given data
Initial pressure (P₁): 81.0 kPaInitial temperature (T₁): 50 °CFinal pressure (P₂): ?Final volume (T₂): 100 °CStep 2: Convert the temperatures to the Kelvin scale
When working with gases, we need to consider the absolute temperature. We will convert from Celsius to Kelvin using the following expression.
K = °C + 273.15
T₁: K = 50°C + 273.15 = 323 K
T₂: K = 100°C + 275.15 = 373 K
Step 3: Calculate the final pressure of the gas
At a constant volume, we can calculate the final pressure of the gas using Gay-Lussac's law.
P₁/T₁ = P₂/T₂
P₂ = P₁ × T₂/T₁
P₂ = 81.0 kPa × 373 K/323 K
P₂ = 93.5 kPa
John roller skates 48 km in 3 hours. What is his average speed in kilometers
per hour?
A. 16 miles per hour.
B. 1.6 km/hr.
C. 16.5 km/hr west.
D. 16 km/hr.
Hurrrryyyyyy like I need it rn❤️
Answers
Answer:16km/hr
Explanation:
48km/3hr= 16km/hr
Answer:
16km/ hr
Explanation:
If I began this reaction with 1.7g of O2 , how much water would I make
Answers
In ironmaking, iron metal can be separated from iron ore (Fe2O3) by heating the ore in a blast furnace in the presence of coke, which is a form of carbon: 2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2(g) If 1000 kg of iron ore and 120 kg of coke are heated in a blast furnace, determine the limiting reactant, the theoretical yield of iron metal, and the theoretical yield of carbon dioxide.
Answers
The limiting reactant is iron ore, the theoretical yield of iron metal is 701.344 kg, and the theoretical yield of carbon dioxide is 413.292 kg.
Stoichiometric problemFrom the equation of the reaction:
\(2 Fe_2O_3(s) + 3 C(s) --- > 4 Fe(s) + 3 CO_2(g)\)
The mole ratio of iron ore to carbon is 2:3.
Mole of 1000 kg of iron ore = 1000000/159.69
= 6,262 moles
Mole of 120 kg carbon = 120000/12
= 10,000 moles
Thus, it appears that the carbon is in excess while the iron ore is limited in availability.
The mole ratio of the iron ore and the iron produced is 1:2. Thus, the equivalent number of moles of iron produced will be:
6,262 x 2 = 12,524 moles
Mass of 12,524 moles of iron = 12,524 x 56
= 701,344 g or 701.344 kg
Thus, the theoretical yield of iron is 701.344 kg.
The mole ratio of the iron ore and the carbon dioxide produced is 2:3. The equivalent mole of carbon dioxide produced will be:
6,262 x 3/2 = 9,393 moles
Mass of 9,393 moles carbon dioxide = 9,393 x 44
= 413,292 or 413.292 kg
The theoretical yield of carbon dioxide is, therefore, 413.292 kg.
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Imagine that you have a 7.00 L gas tank and a 3.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 115 atm , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
Answers
According to Boyle's law, the pressure in the acetylene tank is 268.33 atmospheres.
What is Boyle's law?Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
In the given problem , by substituting values in formula P₁V₁=P₂V₂, P₂=115×7/3=268.33 atmospheres.
Hence, the pressure in acetylene tank is 268.33 atmospheres.
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The compound FeCl3 Is made of.
Answers
Answer:
iron and chlorine
Explanation:
H2SO4(aq)+Sr(OH)2(aq)→
Express your answer as a chemical equation. Identify all of the phases in your answer.
Answers
Answer:
H2SO4(aq) + Sr(OH)2 (aq) --> SrSO4(s) + 2H2O (l)
Explanation:
The identification of all the phases with the help of a chemical equation is as follows:
\(H_2SO_4(aq) + Sr(OH)_2 (aq)\) → \(SrS0_4 (s) + 2H_2O (l).\)What is a Chemical equation?The chemical equation may be defined as the systematic demonstration of chemical reactions through which the reactants and the products are indicated in terms of their specific chemical formulae.
According to this question, the reaction of sulfuric acid with strontium hydroxide indicates an example of a double decomposition reaction in which the SO4 of sulfuric acid combines with strontium in order to form strontium sulfate while the hydroxide of strontium combines with H2 of sulfuric acid in order to form water.
Therefore, the identification of all the phases with the help of a chemical equation is well expressed with the help of a chemical equation.
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