Answer:
4.99 ×10²³ molecules
Mass = 28.22 g
Explanation:
Given data:
Mass of H₂O₂ produced = ?
Mass of water react = 14.86 g
Number of molecules of H₂O₂ produced = ?
Solution:
Chemical equation:
2H₂O + O₂ → 2H₂O₂
Number of moles of water:
Number of moles = mass/molar mass
Number of moles = 14.86 g/ 18 g/mol
Number of moles = 0.83 mol
Now we will compare the moles of water and H₂O₂.
H₂O : H₂O₂
2 : 2
0.83 : 0.83
Mass of H₂O₂:
Mass = number of moles × molar mass
Mass = 0.83 mol × 34 g/mol
Mass = 28.22 g
Number of molecules:
1 mole = 6.022×10²³ molecules
0.83 mol × 6.022×10²³ molecules / 1 mol
4.99 ×10²³ molecules
Will mark the brainiest later for correct answers! Please show work.
Mass C12H22O11 = 14.08g
Convert grams to moles:
Convert grams to molecules:
Mass NaCI: 17.75g
Convert grams to molecules:
Convert grams to formula units:
Copper (II) Sulfate Pentahydrate
Chemical Formula: CuSO4.5H2O
Mass: 20.06g
Convert grams to moles:
Formula Units:
Answer:
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles and weighs equal to its molecular mass.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadros number}}[/tex]
a. moles in 14.08 g of [tex]C_{12}H_{22}O_{11}[/tex] = [tex]\frac{14.08g}{342.3g/mol}=0.04113moles[/tex]
molecules in 14.08 g of [tex]C_{12}H_{22}O_{11}[/tex] = [tex]0.04113\times 6.023\times 10^{23}=0.2477\times 10^{23}[/tex]
b. moles in 17.75 g of NaCl = [tex]\frac{17.75g}{58.5g/mol}=0.3034moles[/tex]
molecules in 17.75 g of [tex]NaCl[/tex] = [tex]0.3034\times 6.023\times 10^{23}=1.827\times 10^{23}[/tex]
formula units 17.75 g of [tex]NaCl[/tex] = [tex]0.3034\times 6.023\times 10^{23}=1.827\times 10^{23}[/tex]
c. moles in 20.06 g of [tex]CuSO_4.5H_2O[/tex]= [tex]\frac{20.06g}{249.68g/mol}=0.08034moles[/tex]
formula units in 20.06 g of [tex]CuSO_4.5H_2O[/tex]= [tex]0.08034\times 6.023\times 10^{23}=0.4839\times 10^{23}[/tex]
the rate of effusion of co2 gas through a porous barrier is observed to be 9.31x 10^-4 mol/h. under the same conditions, the rate of effusion of N2 gas would be _______ mol/h
Answer:
[tex]1.167\times 10^{-3}\ \text{mol/h}[/tex]
Explanation:
[tex]R_1[/tex] = Rate of diffusion of [tex]CO_2[/tex] = [tex]9.31\times 10^{-4}\ \text{mol/h}[/tex]
[tex]R_2[/tex] = Rate of diffusion of [tex]N_2[/tex]
[tex]M_1[/tex] = Molar mass of [tex]CO_2[/tex] = 44.01 g/mol
[tex]M_2[/tex] = Molar mass of [tex]N_2[/tex] = 28.0134 g/mol
From Graham's law we have the relation
[tex]\dfrac{R_1}{R_2}=\sqrt{\dfrac{M_2}{M_1}}\\\Rightarrow R_2=\dfrac{R_1}{\sqrt{\dfrac{M_2}{M_1}}}\\\Rightarrow R_2=\dfrac{9.31\times 10^{-4}}{\sqrt{\dfrac{28.0134}{44.01}}}\\\Rightarrow R_2=1.167\times 10^{-3}\ \text{mol/h}[/tex]
The rate of effusion of the [tex]N_2[/tex] gas would be [tex]1.167\times 10^{-3}\ \text{mol/h}[/tex].
NEED ANSWER ASAP HELP!!!!
Answer:
1. 4 Km
2. 40 minutes
3. 0.1 Km/min
Explanation:
1. Determination of the total distance travelled.
From the graph given in the question above, we can see that the total distance travelled by the object is 4 Km since the path taken by the object in the graph ends at the 4 km mark.
2. Determination of the Time taken.
A careful observation of the graph given in the question shows that the entire trip took 40 minutes since the distance travelled by the object ends at the 40 minutes mark on the graph.
3. Determination of the average speed of the object.
Total distance = 4 Km
Total time = 40 mins
Average speed =..?
Average speed = Total distance / total time
Average speed = 4 / 40
Average speed = 0.1 Km/min
Try to balance the 5 attached equations.
Answer:
1)2kclo3=2kcl+3o2
2)2NaCl+F2=2NaF+cl2
3)Pb(OH)2+2HCl=2H2O+PbCl2
4)2Albr3+3k2so4=6kbr+al2(so4)3
5)CH4+2O2=CO2+2H2O
A solution is a mixture where one substance is dissolved in another. One example of a solution is salt water. Why does salt water appear to be a single substance even though it contains more than one substance? A. Each component in salt water retains its original physical properties. B. The components in salt water cannot be separated from each other. C. The particles in salt water are spread throughout. D. Salt water is a solution and also a pure substance.
Answer: C. The particles in salt water are spread throughout.
Explanation:
Homogeneous mixtures: It is a mixture that has uniform composition throughout the solution and the particle size or shapes are not different. There is no physical boundary between the dispersed phase and dispersion medium. Example: Salt dissolved in water.
Heterogeneous mixtures: It is a mixture that has non-uniform composition throughout the solution and the particle size or shapes are also different. There is a physical boundary between the dispersed phase and dispersion medium. Example: sand in water.
Answer:
Its c
Explanation:
A solution is a mixture where one substance is dissolved in another. One example of a solution is salt water. Why does salt water appear to be a single substance even though it contains more than one substance. Got it right in school city
A breeder reactor is one type of nuclear reactor. In a breeder reactor, uranium-238 is transformed in a series of nuclear reactions into plutonium-239.
The plutonium-239 can undergo fission as shown in the equation below. The X represents a missing product in the equation.
Compare the amount of energy released by completely fissioned plutonium-239 to the amount of energy released by the complete combustion of the same amount of coal.
Answer:hope this help
Explanation:
Please help me with this question
Thank you!
Answer:
B. 3+
Explanation:
When Fe²⁺ loses an electron, it becomes an Fe³⁺ ion.
The loss of an electron in an atom makes the atom becomes positively charged. Further losing electrons makes the atom more positive.
For the given ion;
Fe²⁺ if it loses an electron more, it becomes Fe³⁺.
The expression is given as:
Fe²⁺ → Fe³⁺ + e⁻
Differentiate between worldwide conservation and national conservation policy.
The mole is used in chemistry
A) to count large numbers of very small particles, such as atoms or molecules.
B) to relate the mass and the number of particles of a substance to each other.
C) to relate the mass and the volume of a substance to each other.
D) all of these are true.
how do you classify the society on the basis of economy write one characteristic of any two of them
Answer:
Explanation:
(1) The primary industry is mainly agriculture, which includes agricultural, forestry, animal husbandry and fishery components. Agriculture is the foundation of social economy. (2) The secondary industry, which mainly includes the industrial and construction industries.
Which statement describes the motion of the sun?
The sun rotates at the same rate throughout.
The sun does not rotate at its poles.
Different parts of the sun rotate at different rates.
The sun does not rotate at its equator.
Answer: Different parts of the sun rotate at different rates.
Explanation:
The statement that best describes the motion of the sun is that different parts of the sun rotate at different rates.
First and foremost, we should note that the rotation of the sun is on its axis and also the sun isn't a solid. Due to this, its motion will be that there'll be rotation of different part of it at different rates. Assuming the sun was solid, then all of its parts will move together.
Answer:
Different parts of the sun rotate at different rates.
Explanation: pic proof
Sex cells are produced by the process of mitosis.
True
False
Answer:
True is the Answer.
Explanation:
True.
how many molecules are in 18moles of CH.
Answer:
1.08 x 10²⁵molecules
Explanation:
From the mole concept we know that ;
1 mole of any substance contains 6.02 x 10²³ molecules
This number is the Avogadro's number.
So;
18 mole of CH will contain:
Number of molecules of CH = 18 x 6.02 x 10²³ = 1.08 x 10²⁵molecules
The number of molecules is therefore 1.08 x 10²⁵molecules
8 moles Cl to grams 3
Answer: I don’t understand what your asking elaborate more
Explanation:
What is the molar mass of carbon?
give reason unit of volume is a derived unit
Answer:
A derived unit is defined as the unit that is created from a product of SI base units. Volume is an example of derived unit because it is not possible to measure volume directly using any measuring device For eg., Volume of water in bucket is can not be measured using rule, or scale, or any other measuring device.
Hence, volume is a derived unit.
An atom of which of the following has the least ability to attract electrons?
A. Silicon
B. Oxygen
C. Nitrogen
D. Bromine
Answer:
A. Silicon
Explanation:
The ability of an atom to attract electrons is known as electronegativity.
Electronegativity is the measure of the relative tendency with which the atoms of the element attract valence electrons in a chemical bond.
Across a period from left to right, the ability to attract electrons increases. Down a group, the ability decreases. Silicon is to the left most part and it will have the the least ability to attract electrons.Question 5 (5 points)
True or False. Open clusters are groups of up to a few thousand stars that are loosely held together by gravity and
tend to appear blue.
Answer:
have a p000000000000000000
Chemistry 1 - Types of Radioactive Decay
Answer:
Explanation:
The reaction expression is given as:
⁴⁰₁₈ Ar → X + ⁰₁B
To solve this problem, we must bear in mind that both mass number and atomic number must be conserved.
So;
For the mass number:
40 = A + 0
A = 40
For atomic number:
18 = Z + 1
Z = 18 - 1 = 17
An atom is identifiable by the atomic number. Since the atomic number of X is 17 then it is Cl, chlorine
Which statement accurately represents the properties of these moles.. help ASAP, teacher didn’t teach me this
Answer:
1 mole of O₂ has more mass compared to 1 mole of Na
Explanation:
1 mole oxygen atom and 1 mole of Na atom has the same number of particles.
A mole of any substance has the Avogadro number of particles which is
6.02 x 10²³
Mass of a substance = number of moles x molar mass
Molar mass of O₂ = 2(16) = 32g/mol
Molar mass of Na = 23g/mol
Mass of O₂ = 1 x 32 = 32g
Mass of Na = 1 x 23 = 23g
So, 1 mole of O₂ has more mass compared to 1 mole of Na
help me please with my science test questions 5 and 6
Answer:
5. Element J has the highest atomic number
6. Elements G and L have the same number of electrons in their outermost shell.
Explanation:
The periodic table of elements is a table which shows the arrangement of the elements in the order of increasing atomic number. Starting from the topmost left-hand side of the table where the element with the least atomic number is placed, and going across the table from left to right and down to the lowest point to the right of the table, where the element with the highest atomic number is located, the atomic number of elements progressively increases.
Looking at the table, it can be seen that the element J is found at the lowest point to the right of the table. Therefore, element J has the highest atomic atomic number.
6. In the periodic table, elements are arranged into groups and periods. The groups are the columns while the periods are the rows. Elements in the same column or group have the same number of electrons in their outermost shell. Therefore, element G and L have the same number of electrons in their outermost shell.
Describe four ways by which organisms reproduce asexually
Answer: thay can't make cells
Explanation:
A wave in which particles of matter vibrate at right angles to the direction
the wave travels is called a(n) wave.
Enter the answer
Check It
Answer:
it will transverse wave I think it will help you
What happened when you placed your bottle system
in cold water?
Answer:
The water level in the pipe went down.] ... [The hot water in the cup heated up the water particles inside the bottle. They began to move more. Greater motion (kinetic energy) pushed the particles farther apart, resulting in expansion.
The element oxygen, represented by the symbol O, is classified as
A. a compound.
В. a mixture.
C. a solution.
D. a pure substance.
Please help soon! :))
How many atoms are in a molecule of RSq?
If we react 5.4g of sodium chloride with an unknown amount of fluorine gas, we produce 4.9g of sodium fluoride and 3.7g chlorine gas. How much fluorine was consumed in the reaction?
Answer:
1.9g of F₂ were consumed in the reaction
Explanation:
Based on the chemical reaction:
2NaCl + F₂ → 2 NaF + Cl₂
Where 2 moles of NaCl react per mole of F₂ to produce 2 moles of NaF and 1 mole of Cl₂
To understand in a better way how the reaction occurs we need to convert each mass of compound to moles:
Moles of NaCl -Molar mass: 58.44g/mol-:
5.4g * (1mol / 58.44g) = 0.092 moles NaCl
Moles of NaF -Molar mass: 41.988g/mol-:
4.9g * (1mol / 41.998g) = 0.12 moles NaF
Moles of Cl₂ -Molar mass: 70.90g/mol-:
3.7g * (1mol / 70.90g) = 0.052 moles Cl₂
That means approximately 0.1 moles of NaCl react with 0.05 moles of F₂ to produce 0.1moles of NaF and 0.05 moles of Cl₂.
0.05 moles of F₂ are:
0.05 moles * (38g/mol) =
1.9g of F₂ were consumed in the reactionWhat can you determine about an element if you only know its group number on the periodic table?
A. The total number of protons and neutrons
B. The number of protons
C. The total number of electrons
D. The number of valance elctrons
Answer:
c
Explanation:
The gas that makes up about 21 percent of the atmosphere is blank
Answer:
oxygen makes up 21 percent of the atmosphere
4. Calculate the molar mass of Fe2(SO4)3. Then calculate the mass of iron(III) sulfate of 4.05X1023 formula units. Answer: __269g Fe2(SO4)3_
Answer:
399.88 [tex]\frac{4.05*10^{23} }{6.022*10^{23} }[/tex] =269
Explanation:
399.88 is the molar mass of iron(III) sulfate.
The mass of 4.05 × [tex]10^{23[/tex] formula units of Fe2(SO4)3 is approximately 6.48 × [tex]10^{25[/tex] grams.
Mass from formula unitsTo calculate the molar mass of Fe2(SO4)3, we need to determine the atomic masses of the individual elements involved and multiply them by their respective subscripts:
Fe: 55.845 g/mol (atomic mass of iron)S: 32.06 g/mol (atomic mass of sulfur)O: 16.00 g/mol (atomic mass of oxygen)Fe2(SO4)3 consists of 2 iron atoms, 3 sulfur atoms, and 12 oxygen atoms:
Molar mass of Fe2(SO4)3 = (2 * 55.845) + (3 * 32.06) + (12 * 16.00) = 159.69 g/mol
To calculate the mass of 4.05 × 10^23 formula units of Fe2(SO4)3, we can use the molar mass:
Mass = (4.05 × 10^23) * (159.69 g/mol) = 6.48 × 10^25 g
Rounded to two decimal places, the mass of 4.05 × [tex]10^{23[/tex] formula units of Fe2(SO4)3 is approximately 6.48 × [tex]10^{25[/tex] grams.
More on formula units can be found here: https://brainly.com/question/33740227
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