Answer:
The answer is 82,724.25 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.98 \times {10}^{28} }{6.02 \times {10}^{23} } \\ = 82724.2524...[/tex]
We have the final answer as
82,724.25 molesHope this helps you
5. What is the pH of an aqueous solution of the strong acid, Perchloric Acid (HClO4), with a concentration of 0.007 M?
What is the formula for Mercury ii monohydrogen phosphate?
Answer:
CaHPO4 i think
Explanation:
How many molecules of SO₃ can be formed from 0.35 moles of O₂ (assuming excess SO₂) from the following UNBALANCED equation?
SO₂(g) + O₂(g) → SO₃(g)
Molecules of SO₃ : 4.214 x 10²³
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products
Reaction(balanced)
2SO₂(g) + O₂(g) → 2SO₃(g)
mol SO₃ :
[tex]\tt mol~SO_3=\dfrac{2}{1}\times mol~O_2[/tex]
[tex]\tt 2\times 0.35=0.7[/tex]
number of molecules :
1 mol = 6.02 x 10²³ particles(atoms, molecules,ions)
[tex]\tt 0.7\times 6.02\times 10^{23}=4.214\times 10^{23}[/tex]
The number of molecules of SO₃ that could be formed is 4.2 × 10²³ molecules
From the question,
We are to determine the number of molecules of SO₃ that could be formed.
The given chemical equation for the reaction is
SO₂(g) + O₂(g) → SO₃(g)
First, we will balance the chemical equation
The balanced chemical equation for the reaction is
2SO₂(g) + O₂(g) → 2SO₃(g)
This means
2 moles of SO₂ reacts with 1 mole of O₂ to produce 2 moles of SO₃
From the given information
Number of moles of O₂ present = 0.35 moles
Since,
2 moles of SO₂ reacts with 1 mole of O₂ to produce 2 moles of SO₃
Then,
2×0.35 mole of SO₂ will react with the 0.35 mole of O₂ to produce 2×0.35 mole of SO₃
That is,
0.70 mole of SO₂ will react with the 0.35 mole of O₂ to produce 0.70 mole of SO₃
∴ 0.70 mole of SO₃ could be produced
Now, for the number of molecules of SO₃ that could be produced,
Using the formula
Number of molecules = Number of moles × Avogadro's constant
∴ Number of molecules of SO₃ that could be formed = 0.70 × 6.022 × 10²³
Number of molecules of SO₃ that could be formed = 4.2154 × 10²³
Number of molecules of SO₃ that could be formed ≅ 4.2 × 10²³ molecules
Hence, the number of molecules of SO₃ that could be formed is 4.2 × 10²³ molecules
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Fossil fuels are clean-burning fuels. true or false
Answer:
Energy cannot be converted from one form to another.
Answer:
false
Explanation:
Fossils fuels are actually polluting the atmosphere therefore, it can not be a clean-burning fuel.
Cyclopropane, C3H6, is used as a general anesthetic. If a sample of cyclopropane stored in a 2.36-L container at 10.0 atm and 25.0°C is transferred to a 7.79-L container at 5.56 atm, what is the resulting temperature
The resulting temperature : 546.91 K = 273.91 °C
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = final gas pressure
V2 = the final volume of gas
T1 = initial gas temperature (K)
T2 = final gas temperature
P₁=10 atm
V₁=2.36 L
T₁=25+273=298 K
P₂=5.56 atm
V₂=7.79 L
[tex]\tt T_2=\dfrac{P_2.V_2.T_1}{P_1.V_1}\\\\T_2=\dfrac{5.56.\times 7.79\times 298}{10\times 2.36}\\\\T_2=546.91~K=273.91^oC[/tex]
what are the properties of elements??
Answer:
Chemical properties
Atomic number. The atomic number indicates the number of protons within the core of an atom.
Atomic mass. The name indicates the mass of an atom, expressed in atomic mass units (AMU).
Electronegativity according to Pauling.
Density.
Melting point.
Boiling point.
Vanderwaal's radius.
Ionic radius.
And many more.
Explanation:
Answer:
Atomic number. The atomic number indicates the number of protons within the core of an atom. ...
. Atomic mass. The name indicates the mass of an atom, expressed in atomic mass units (amu). ...
. Electronegativity according to Pauling. ...
. Density. ...
. Melting point. ...
. Boiling point. ...
. Vanderwaals radius. ...
. Ionic radius.
How much force is needed to cause a 15 kilogram bicycle to accelerate at a rate of 10 meters per second per second?
Answer:
F = 150 N
Explanation:
Given data:
Mass of bicycle = 15 kg
Acceleration = 10 m/s²
Force needed = ?
Solution:
Formula:
F = ma
F = force
m = mass
a = acceleration
now we will put the values in formula.
F = 15 Kg × 10 m/s²
F = 150 Kg.m/s²
Kg.m/s² = N
F = 150 N
The smallest possible particle of an element is a(n) .
Answer: Atoms are the smallest particles of an element.
True or False: All temperatures used in the comparisons or calculations of gases must use the Kelvin temperature scale.
Answer:
True
Explanation:
I used my notes from class today. I could be wrong.
Aluminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+3H2SO4âAl2(SO4)3+6H2O.Which reagent is the limiting reactant when 0.550 mol Al(OH)3 and 0.550 mol H2SO4 are allowed to react?How many moles of Al2(SO4)3 can form under these conditions?
How many moles of the excess reactant remain after the completion of the reaction?
Answer:
Explanation:
2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
2 moles 3 moles
2 moles of Al(OH)₃ reacts with 3 moles of H₂SO₄
.55 moles of Al(OH)₃ reacts with .55 x 1.5 moles of H₂SO₄
moles of H₂SO₄ required = .825 moles
moles available = .55 moles , so H₂SO₄ is the limiting reagent .
3 moles of H₂SO₄ yields 1 moles of Al₂(SO₄)₃
.55 moles of H₂SO₄ yields 1 x .55 / 3 moles of Al₂(SO₄)₃
Al₂(SO₄)₃ produced = 1 x .55 / 3 moles = .1833 moles .
Al(OH)₃ reacted = 2 x .55 / 3 = .367 moles
excess Al(OH)₃ remaining = .5 - .367
= .133 moles .
What is an Atomic Model
Answer:
the structure of an atom, theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus, the constitution of the nucleus and the arrangement of the electrons differing with various chemical elements.
Explanation:
Define oxidation and reduction.Balance the following redox reaction by ` oxidation number method or ion electrons method.` I_(2)+OH^(-)rarr I^(-)+10_(3)^(-)+H_(2)O
Answer:
HNO₃ + H₃AsO₃(aq) → NO(g) + H₃AsO₄(aq) + H₂O(l)
Identify the oxidation number of every atom.
Left hand side: H= +1; N= +5; O = -2; As = +3
Right hand side: N = +2; O = -2; H = +1; As = +5
Determine the change in oxidation number for each atom that changes.
N: +5 → +2; Change = -3
As: +3 → +5; Change = +2
Make the total increase in oxidation number equal to the total decrease in oxidation number.
We need 2 atoms of N for every 3 atoms of As. This gives us total changes of -6 and +6.
Place these numbers as coefficients in front of the formulas containing those atoms.
2HNO₃ + 3H₃AsO₃(aq) → 2NO(g) + 3H₃AsO₄(aq) + H₂O(l)
Balance all remaining atoms other than H and O.
Done.
Balance O.
Done.
Balance H.
Done.
Explanation:
How does the number of atoms or molecules in a system affect its thermal energy?
A. A system with fewer atoms and molecules has more thermal energy.
B. A system with more atoms and molecules has more thermal energy.
C. The number of atoms or molecules does not affect the thermal energy of a system.
D. Thermal energy increases as the atoms and molecules in a system move more.
Answer:
D. Thermal energy increases as the atoms and molecules in a system move more.
Explanation:
Thermal energy is a form of kinetic energy possessed by molecules of a system. The measure of this kinetic energy in an atom is called heat.
The average kinetic energy of a system is the temperature.
According to the kinetic theory, the more the particles move, the more their thermal energy. Thermal energy is often predicated on the velocity of the particles of the medium.I need it now pleasee help
Answer:
Their energes can have any values
Explanation:
A 500 mL sample of gas at 960 kpa is compressed to 100 mL. What is the new pressure of the gas?
Please I really need help.
Answer:
The answer is 4800 kPaExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{500 \times 960000}{100} = \frac{480000000}{100} \\ = 4800000[/tex]
We have the final answer as
4800 kPaHope this helps you
How many milliliters of 2.00 M H2SO4 will react with 28.0 g of NaOH?
Taking into account the reaction stoichiometry and the definition of molarity, 175 mL of 2 M H₂SO₄ will react with 28.0 g of NaOH.
Reaction stoichiometryIn first place, the balanced reaction is:
H₂SO₄ + 2 NaOH → Na₂SO₄ + 2 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₂SO₄: 1 moleNaOH: 2 moles Na₂SO₄: 1 moleH₂O: 2 molesThe molar mass of the compounds is:
H₂SO₄: 98 g/moleNaOH: 40 g/moleNa₂SO₄: 142 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
H₂SO₄: 1 mole× 98 g/mole= 98 gramsNaOH: 2 moles× 40 g/mole= 80 gramsNa₂SO₄: 1 mole× 142 g/mole= 142 gramsH₂O: 2 moles× 18 g/mole= 36 gramsDefinition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
[tex]Molarity= \frac{number of moles}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
Moles of H₂SO₄ requiredThe following rule of three can be applied: If by reaction stoichiometry 80 grams of NaOH react with 1 mole of H₂SO₄, 28 grams of NaOH react with how many moles of H₂SO₄?
[tex]moles of H_{2}S O_{4} =\frac{28 grams of NaOHx1 mole ofH_{2}S O_{4} }{80 grams of NaOH}[/tex]
moles of H₂SO₄= 0.35 moles
Volume of H₂SO₄ requiredIn this case, you know:
Molarity= 2 M= 2 [tex]\frac{moles}{liter}[/tex]amount of moles= 0.35 molesReplacing in the definition of molarity:
[tex]2 \frac{moles}{liter}= \frac{0.35 moles}{volume}[/tex]
Solving:
2 [tex]\frac{moles}{liter}[/tex] × volume= 0.35 moles
volume= 0.35 moles ÷ 2 [tex]\frac{moles}{liter}[/tex]
volume= 0.175 liters= 175 mL (being 1 L= 1000 mL)
Finally, 175 mL of 2 M H₂SO₄ will react with 28.0 g of NaOH.
Learn more about
the reaction stoichiometry:
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Why is fusion not a practical source of energy?
Answer:
Light i think
Explanation:
light is a source of energy also
If one of the reactants in a reaction is Na20, what is known about the products?
A. The products will have no more than 2 Na atoms and 1 0 atom.
B. There is not enough information to say anything about the products.
C. The products will contain exactly 2 Na atoms and 1 O atom.
D. The products will have at least 2 Na atoms and 1 0 atom.
Answer:D
Explanation:
A P E X
Which molecule is most polar?
A) CH3CHO
B)CO2
C)CH3Cl
D)C2H6
E)NONE
the answer is none
Explanation:
Water
Water is the most polar molecule because a bond between oxygen and hydrogen has the most difference out of the atoms listed. Although the oxygen has two hydrogens bonded, this does not decrease the electronegativity of oxygen, but oxygen unfairly shares sets of electrons from both hydrogens, making it more polar still
There are two types of molecule in chemistry, one is polar molecule and other is non polar molecule. Therefore, among all the given option none is polar molecule. The correct option is option D.
What is polar molecule?A polar molecule is a type of chemical compound where there is an uneven distribution of electrons among the covalently bound atoms. The term "polarity" refers to how unlike two molecules' electrical poles are from one another. If they are quite dissimilar, the species is said to be a highly polar molecule.
Dipole moment tells about the extent of polarity in a molecule. It is measured in units of Debye. It can be calculated by multiplying charge and the separation between these two charges. Among all the given option none is polar molecule.
Therefore, among all the given option none is polar molecule. The correct option is option D.
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HELPPP !!
Walk-in refrigerator or freezer units
must include an inside safety release
O must be air-tight within 98.5% tolerance
O must have an interior ceiling no less than 6'4" in height
O all of the above
Answer:
all of the above
Explanation:
PLS HELP!!!
What does it mean when there is a physical change?
A new substance has been formed.
Matter has changed on the molecular level.
Matter has changed from one substance into another.
Matter has changed size, shape or form.
Answer:
Physical Change. Physical changes are changes in which no bonds are broken or formed. This means that the same types of compounds or elements that were there at the beginning of the change are there at the end of the change.
1. Sugar in a jar has a volume of 750 cubic centimeters and a mass of 690 grams.
Calculate its density. Write your answer to the hundredths place.
Answer:
The answer is 0.92 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{690}{750} = \frac{69}{75} = \frac{23}{25} \\ [/tex]
We have the final answer as
0.92 g/cm³Hope this helps you
Weathering refers to the effects of exposure to A) insults B)pressure C)weather
What is different at the molecular level between a solid and a liquid? (multiple can be correct)
a. The type of molecule
b. Strength of intermolecular forces
c. Speed of particles
d. Nothing
Answer:
B. Strength of intermolecular forces
The different at the molecular level between a solid and a liquid is the strength of intermolecular forces. Therefore, option B is correct.
What are intermolecular forces ?The term intermolecular forces are defined as the attractive and repulsive forces that form between the molecules of a substance. Intermolecular forces are responsible for most of the physical and chemical characteristics of matter.
The intermolecular forces play a crucial role in determining the physical characteristics of molecules, including their melting and boiling points, density, and enthalpies of fusion and vaporization.
Highly electronegative atoms produce hydrogen bonding. They are the greatest intermolecular force and only exist between hydrogen and oxygen, fluorine, or nitrogen.
Thus, the different at the molecular level between a solid and a liquid is the strength of intermolecular forces, option B is correct.
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Googleumbrella umbrella umbrella
oh wow, that truly astonished me in ways words cannot explain!
Answer:
Oh wow!
Explanation:
what is a ignous rocks
Answer:
Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
- Wikipedia
Answer: Igneous rocks are rocks that form when hot molten lava/rock cools and crystallizes.
Explanation:
if the reactant solution is used to write on a piece of paper and the paper is allowed to partially dry, what can be done to bring out the colored writing
Answer:
Expose the paper to the atmosphere or moisture
Explanation:
An interesting experiment that demonstrates the equilibrium of complexes is that of the invisible ink.
The invisible ink is pink colored [Co(H2O)6]Cl2 which is essentially colorless and pale when it is used to write on paper. This complex is almost colorless when dilute. Therefore, when it is used in writing, the writing can not be seen.
However, if the paper is left to stand or allowed to absorb moisture; the following equilibrium is set up:
[Co(H2O)6]Cl2 ⇄ [CoCl2(H2O)2] + 4H2O
The formation of blue [CoCl2(H2O)2] on standing or exposure to moisture enables the colored writing to be easily read.
1. Define matter.
2. Compare and contrast length, mass, and volume.
3. What are the three states of matter? Name at least three phase changes.
4. What are the base metric units for:
a. Length
b. Volume
c. Mass
d. Temperature
5. What is the equation used to find density?
6. List the different groups on the periodic table
7. Contrast metals and nonmetals.
8. Draw and label a picture of an atom which includes:
a. Neutrons
b. Protons
c. Electrons
9. Where are the protons and neutrons found in an atom?
10. What represents the number of protons?
Answer:
its 10
Explanation:
i took the test
How many grams are in 3.20 mol of sodium chloride (NaCl)?
Answer:
5.52 nac
Explanation:
How did you organize the tiles in part A? Describe the method that you used.
Periodic table of numbers tiles
Answer:
I ordered the tiles from left to right and top to bottom as the numbers kept increasing. The tiles were also organized based on the color and shape that they were. The tiles with the same color and shape were arranged in the same column.
Explanation:
In the modern periodic table, the elements are listed in order of increasing atomic number and elements having similar chemical properties naturally line up in the same column (group).
