Answer:
C5H12 + 8O2 —> 5CO2 + 6H2O
The coefficients are 1, 8, 5,6
Explanation:
The equation for the reaction is given below:
C5H12 + O2 —> CO2 + H2O
Now let us balance the equation. This is illustrated below:
There are 5 atoms of C on the left side and 1atom on the right side. It can be balance by putting 5 in front of CO2 as illustrated below:
C5H12 + O2 —> 5CO2 + H2O
There are 12 atoms of H on the left side and 2atoms on the right. It can be balance by putting 6 in front of H2O as illustrated below:
C5H12 + O2 —> 5CO2 + 6H2O
There are a total of 16 atoms of O on the right side and 2atoms on the left side. It will be balance by putting 8 in front of O2 as illustrated below:
C5H12 + 8O2 —> 5CO2 + 6H2O
Now we see clearly that the equation is balanced as the number of atoms of the different elements on both sides of the equation are the same.
The coefficients are 1, 8, 5,6
use the molar volume of a gas at STP to calculate the density of nitrogen gas at STP. How do I use the molar volume?
Answer:
Density=1.25g/dm^3
Explanation:
Density=mass/volume
Mass of nitrogen gas is 2(14)=28g
Volume at STP=22.4dm^3
Density=28/22.4=1.25g/dm^3
The mass is the molar mass of N₂ (28.01 g) and the volume is 1.25 L
To calculate the density of nitrogen gas at STP using the molar volume of a gas at STP, you can follow these steps:
1. Understand the concept: Molar volume of a gas at STP (Standard Temperature and Pressure) is 22.4 L/mol.
This means that one mole of any ideal gas occupies 22.4 liters at STP.2. Determine the molar mass of nitrogen: The molar mass of nitrogen (N2) is approximately 28.02 g/mol.
This means that one mole of nitrogen gas weighs 28.02 grams.3. Use the ideal gas law: The ideal gas law states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
At STP, pressure (P) is 1 atm and temperature (T) is 273 K.4. Calculate the number of moles: Since the molar volume at STP is 22.4 L/mol, and the volume is equal to 22.4 liters, the number of moles of nitrogen gas is 1 mole.
5. Calculate the density: Density (ρ) is defined as mass divided by volume. Since we have one mole of nitrogen gas, which weighs 28.02 grams, we can calculate the density as follows:
ρ = [tex]\frac{m}{V}[/tex] ρ = [tex]\frac{28.02g}{22.4 L}[/tex] ρ = 1.25 g/LTherefore , the density of nitrogen gas at STP is 1.25 g/ L
In peas, yellow pods are dominant to green pods. A homozygous recessive pea plant crosses with a heterozygous pea plant. Use the completed Punnett Square below to determine the probability that the offspring will have green pods.
Answer:
50% of the offspring will have green pods.
Explanation:
Use a upper case to identify the dominant allele and lower case to identify recessive allele.
A homozygous pea plant would be YY or gg. The homozygous recessive pea pleant would be gg (YY is dominant).
A heterozygous pea plant would be Yg (or gY which is the same).
The Punnett Square for the cross between a homozygous recessive pea plant (gg) and a heterozygous pea plant (Yg) would be:
g g
Y Yg Yg
g gg gg
Hence, the offspring will have two Yg, which would be yellow pods, and two gg which would be green pods.
That is, 50% of the offspring will have yellow pods and 50% will have green pods.
Which of the following is the correct Lewis structure diagram for Neon? (2 points)
Group of answer choices
The letters Ne with eight dots
The letters Ne with seven dots
The letters Ne with six dots
The letters Ne with five dots
can someone help, like I need an answer now ಥ‿ಥ
Answer:
cell - basic unit of structure and function of all living things
tissue - a group of cells that work together to perform a common function
organ - a group of tissues that work together to perform a common function
organ system - group of organs that work together to perform a common function
Explanation:
What you have there is the biological level of organization. It is how living things are organized from the simplest to the most complex. Each level makes up another level.
As you can see in your exercise, the basic unit of life is the cell and cells make up tissues, while tissues make up organs and so forth. There are higher levels of organizations passed organ system.
Cell - tissue - organ - organ system - organism - population - community - ecosystem - biosphere
can someone help me out asap tap on the picture
Answer:
[tex]\large\boxed{\large\boxed{x=54\º}}[/tex]
Explanation:
In the figure, two secants that intersect outside a circle form an angle with measure of xº and the measures of the arcs formed are 136º and 28º.
When two secants intersect outside a circle, the measure of the angle formed is one-half the absolute difference of the measures of the intercepted arcs.
Then, you can write and solve this equation:
[tex]x=\dfrac{1}{2}(136\º-28\º)\\\\\\x=54\º[/tex]
Find the answer for question c
1. What is the smallest unit of life in all living things called?
Answer:
The answer is Cell
Explanation:
Answer:
The answer is cell. A cell is the smallest unit of a living thing.
What is the precipitate form of NaOH+FeSO4?
Answer:
(Fe(OH)2 + Na2SO4
Explanation:
Iron (II) hydroxide precipitate. Iron (II) hydroxide precipitate (Fe(OH)2) formed by adding few drops of a 1M solution of sodium hydroxide (NaOH) to 0.2 M solution ferrous sulfate (FeSO4). The reaction is FeSO4 + NaOH -> Fe(OH)2 + Na2SO4. This is an example of a double replacement reaction. Pure iron (II) hydroxide is white, however even trace amounts of oxygen make it greenish.
1. Imagine you enter your favorite pizza restaurant. Describe what happens at the
particle level that allows you to smell the pizza. Use a particle diagram.
Answer:
i like cheese pizza the best
Explanation:
it smacks
Calculate the mass, in grams, of 0.245 moles of nickel(11) perchlorate
Answer:
38.7 g
Explanation:
first you find the molar mass of Nickle(II) Perchlorate
Nickle = 58.693 g/mol
Perchlorate is Chlorine and Oxygen combined
Molar mass of chlorine is 35.453 g/mol
Oxygen = 15.999 g/mol but since it has 4 oxygen atoms combined with chlorine you have to multiply 15.999 by 4 which is 63.996 add all the masses together and that gives you 158.142. Since you have moles you multiply the moles by the molar mass which looks like this. 0.245 * 158.142 which equals 38.74479 but with sign figs it is 38.7g as your final answer. Ask me if you are confused about something.
To find the mass of 0.245 moles of nickel(II) perchlorate, first calculate its molar mass by summing the atomic masses of nickel, chlorine, and oxygen, resulting in 257.59 g/mol. Then, multiply the number of moles (0.245) by the molar mass to get 63.11 grams.
Explanation:To calculate the mass, in grams, of 0.245 moles of nickel(II) perchlorate, we need to determine the molar mass of nickel(II) perchlorate. This involves adding the atomic masses of all atoms in the formula. For nickel(II) perchlorate, Ni(ClO4)2, the calculation is as follows:
Nickel (Ni): 58.69g/molChlorine (Cl) in perchlorate: 35.45g/mol × 2 = 70.90g/mol (because there are two ClO4 units)Oxygen (O) in perchlorate: 16.00g/mol × 8 = 128.00g/molAdding these together, the molar mass of Ni(ClO4)2 = 58.69 + 70.90 + 128.00 = 257.59g/mol.
Now, to find the mass of 0.245 moles of nickel(II) perchlorate:
Mass = number of moles × molar mass = 0.245 moles × 257.59 g/mol = 63.11 grams.
Therefore, 0.245 moles of nickel(II) perchlorate has a mass of 63.11 grams.
0.50 mol A, 0.60 mol B, and 0.90 mol C are reacted according to the following reaction
A + 2B + 3C → 2D + E
Identify the limiting reactant(s) in this scenario.
Reactant C should be considered as the limiting reactant in this given situation.
Identification of the limiting reactant(s):Since
A balanced chemical reaction is:
A + 2B + 3C → 2D + E
And, number of moles should be
A = 0.50 mole
B = 0.60 moles
C = 0.90 moles
Now here we considered A as the reactant
So,
1 mole of A reacted to form 2 moles of D
0.50 moles of A will produce = 1 mole of D
Now considered B as the reactant
2 moles of B reacted to form 2 moles of D
0.60 moles of B reacted to form x moles of D
x = 2 moles of D is produced.
Now considered C as the reactant:
3 moles of C reacted to form 2 moles of D
O.9 moles of C reacted to form x moles of D
= 0.60 moles of D is formed.
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If you see a large “L” on the weather map, what type of weather can you expect there?
Answer:
low pressure which means means stormy weather
Explanation:
welcome to brainily, and hope this helps
Answer:
Low pressure
Explanation:
When there is a L it means low pressure which means rainy weather.It usually brings lots of rain and wind.
Which type of magma would you expect to produce the most explosive volcanic eruption?
Felsic magma, with its high silica content and high gas levels, leads to the most explosive volcanic eruptions due to the build-up of pressure and difficulty for gases to escape.
The type of magma that would produce the most explosive volcanic eruption is felsic magma. This kind of magma has high viscosity due to a higher silica content of around 70% SiO2 and contains a large amount of gas, making it quite thick. These characteristics prevent gases from escaping easily, resulting in a build-up of pressure within the magma chamber. When the pressure becomes too great, the magma breaks through the surface in a catastrophic explosion, sending rock, ash, and pyroclastic debris into the atmosphere. The explosiveness of felsic eruptions can be enhanced if there is rapid melting of ice or snow on a volcano, which can lead to devastating mudflows known as lahars.
Find the mass of 4.5 miles of H3PO4
Answer:
Mass, M is 440.883g
Explanation:
Given the following;
Moles=4.5moles
Molar mass of H3PO4=
Atomic mass of Hydrogen H=(1*3)=3
Atomic mass of Phosphorus P=30.974
Atomic mass of Oxygen O=(16*4)=64
Therefore, Molar mass is;
H3PO4=3+30.974+64=97.974g/mol
[tex]{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Mass M = Number of moles × Molar mass
M = 4.5 × 97.974
M = 440.883g
How many molecules are in 4.5 moles of CO2?
Answer:
2.71 × 10^24 molecules
Explanation:
We are given;
Moles of CO₂ as 4.5 moles
We are required to determine the number of molecules
From the Avogadro's constant;
1 mole of a molecular compound contains 6.022 × 10^23 molecules
Therefore;
Molecules of CO₂ = Moles of CO₂ × Avogadro's constant
That is;
= 4.5 moles × 6.022 × 10^23 molecules/mole
= 2.71 × 10^24 molecules
Hence, 4.5 moles of CO₂ contains 2.71 × 10^24 molecules
Avogadro's constant is a proportionality factor, which relates to the number of units in one mole of any substance. The value of Avogadro constant is 6.022 [tex]\times 10^{23}[/tex].
Given that:
Moles of CO₂ = 4.5 moles
Number of molecules = ?
Avogadros constant = 6.022 [tex]\times 10^{23}[/tex]
Molecules in the Carbon dioxide can be calculated as:
Molecules of CO₂ = Moles of carbon dioxide x Avogadro constant
Molecules of CO₂ = [tex]4.5\times 6.022[/tex] [tex]\times 10^{23}[/tex]
Molecules of CO₂ = [tex]2.71 \times 10 ^{24}[/tex] molecules
Thus, the 4.5 moles of carbon dioxide will have [tex]2.71 \times 10 ^{24}[/tex] molecules.
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What is the specific heat for the aluminum wire?
J/gºC
What is the specific heat for the steel wire?
J/g°C
What is the specific heat for the lead pellets?
J/gºC
Answer:
Explanation:
The specific heat of a substance is the amount of heat required to the raise the temperature of a unit mass of substance by 1°C.
This physical quantity is usually determined in the laboratory. It is an intensive property of substances and a constant for pure samples of material.
Specific heat for the steel wire 0.82J/g°C
specific heat for the steel wire 0.47J/g°C
specific heat for the lead pellets 0.25J/g°C
Specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.
It has been a physical quantity and has been directly proportional to the motion of molecules.
Specific heat:
The increase in mass of the substance results in the increase in the attraction force and thus the motion of the atoms has been slow down. Thus, with the increase in mass of the element, the specific heat decreases.
The specific heat of the following elements has been:
Specific heat of aluminum wire, [tex]c=0.82\rm \;J/g^\circ C[/tex]Specific heat of steel wire, [tex]c=0.47\rm \;J/g^\circ C[/tex]Specific heat of lead pellets, [tex]c=0.25\rm \;J/g^\circ C[/tex]For more information about specific heat, refer to the link:
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Describe the “backbone” of many polymers
In polymer science, the backbone chain of a polymer is the longest series of covalently bonded atoms that together create the continuous chain of the molecule.
You want to minimize an objects thermal energy loss on a cold day. How does heat energy transfer affect thermal energy loss?
1- A material that transfers heat energy at any rate will not experience any change in the thermal energy because this material will be able to absorb energy from its surroundings.
2- A material that transfers heat energy more easily than other material will experience a slower rate of thermal energy loss than an object that does not transfer heat energy easily.
3- A material that transfers heat energy at any rate will experience an increase in thermal energy because this material will be able to absorb cold energy from its surroundings.
4- A material that transfers heat energy more easily than another material will experience a greater rate of thermal energy loss than an object that does not transfer heat energy easily.
Answer:
4- A material that transfers heat energy more easily than another material will experience a greater rate of thermal energy loss than an object that does not transfer heat energy easily.
Explanation:
Thermal energy loss has to do with loss of heat energy by a body to another body or its environment. The aim of the process is usually the attainment of thermal equilibrium between the body and its environment.
On a cold day, a material that transfers thermal energy more easily will loose thermal energy faster than an object that does not transfer thermal energy. The rate of heat transfer of a body determines its rate of loss of thermal energy.
The correct statement is 4. A material that transfers heat energy more easily than another material will experience a greater rate of thermal energy loss than an object that does not transfer heat energy easily.
To understand why option 4 is correct, let's consider the principles of heat transfer. Heat energy can be transferred in three ways: conduction, convection, and radiation. A material that transfers heat energy more easily is a better conductor of heat. This means that it allows heat to move through it more readily, either from a warmer to a cooler region or vice versa.
On a cold day, an object's thermal energy will naturally tend to flow towards the cooler surroundings because of the temperature difference. If the material of the object is a good conductor of heat (i.e., it transfers heat energy more easily), it will lose its thermal energy to the environment at a faster rate compared to a material that is a poor conductor of heat (an insulator). This is because the good conductor does not impede the flow of heat energy, allowing it to move towards the colder surroundings more quickly.
Conversely, a material that does not transfer heat energy easily, such as an insulator, will impede the flow of heat energy. This means that less thermal energy will be lost from the object to the environment over a given period of time, thus minimizing thermal energy loss.
Let's analyze the incorrect options:
1. This statement is incorrect because a material that transfers heat energy at any rate will experience a change in thermal energy. If it transfers heat energy to its surroundings, it will lose thermal energy, not maintain the same level of energy.
2. This statement is the opposite of the correct principle. A material that transfers heat energy more easily will actually lose thermal energy faster, not slower.
3. This statement is incorrect because a material that transfers heat energy at any rate will not necessarily experience an increase in thermal energy. On a cold day, the material will lose heat energy to its surroundings, not gain it.
In summary, to minimize an object's thermal energy loss on a cold day, one should use materials that do not transfer heat energy easily, as they will resist the flow of heat away from the object, thus keeping it warmer for a longer period of time.
In the following reaction, how many moles of CO2 will form if 10 moles of C3H4 are reacted? How many moles of O2 will also be consumed?
C3H4+4O2->3CO2+2H2O
If 10 moles of C3H4 are reacted, 30 moles of CO2 will form and 40 moles of O2 will be consumed.
Explanation:In the given reaction, C3H4 reacts with 4 O2 to form 3 CO2 and 2 H2O. The stoichiometry of the reaction tells us that for every 1 mole of C3H4 reacted, 3 moles of CO2 are produced. Therefore, if 10 moles of C3H4 are reacted, we can use the ratio of moles to determine the number of moles of CO2 produced, which would be (10 moles C3H4) x (3 moles CO2 / 1 mole C3H4) = 30 moles of CO2.
In the same reaction, 4 moles of O2 react for every 1 mole of C3H4. So if 10 moles of C3H4 are reacted, we can use the ratio of moles to determine the number of moles of O2 consumed, which would be (10 moles C3H4) x (4 moles O2 / 1 mole C3H4) = 40 moles of O2.
30 moles of CO₂ will be formed for 10 moles of C₃H₄ that reacted; 40 moles of O₂ will be consumed.
To determine how many moles of CO₂ will form and how many moles of O₂ will be consumed when 10 moles of C₃H₄ are reacted, we need to use the stoichiometry of the given chemical equation:
[tex]C_3H_4 +4O_2 \rightarrow 3CO_2 +2H_2O[/tex]
Step 1: Moles of CO₂ formed:
One mole of C₃H₄ creates three moles of CO₂ according to the balancing equation.
Therefore, if 10 moles of C₃H₄ are reacted, the moles of CO₂ formed can be calculated as follows:
Moles of CO₂ = 10 moles of C₃H₄ × 3 moles go CO₂ / 1 mole of C₃H₄ = 30 moles of CO₂Step 2: Moles of O₂ consumed:
The balanced equation indicates that 1 mole of C₃H₄ consumes 4 moles of O₂.
Therefore, if 10 moles of C₃H₄ are reacted, the moles of O₂ consumed can be calculated as follows:
Moles of CO₂ = 10 moles of C₃H₄ × 4 moles go O₂ / 1 mole of C₃H₄ = 40 moles of O₂This analysis shows that if you start with 10 moles of C₃H₄, you will produce 30 moles of CO₂ and consume 40 moles of O₂ in the reaction.
Which energy resource disturbs the land the most, producing a lot of pollution and requiring large smokestacks to remove much of it?
coal
fuel cells
hydroelectric
natural gas
Answer: I believe it is coal
Explanation: Coal is the most polluting fossil fuel
Answer:
coal (a)
Explanation:
What is the difference between asexual and sexual
Answer:
a
Explanation:
The difference between asexual and sexual is one letter "a". this is becuase if you subtract the first letter a off of asexual then you get sexual.
Due to the low specific heat capacity of water the temperature of water changes much more quickly than the temperature of
land.
This statement is TRUE.
Explanation:
Due to the high heat capacity of water, it takes much more energy to have a gram of water raised by one degree compared to one gram of land. This is why during a hot day, the ground gets hotter faster than the adjacent oceans or adjacent lakes. It also takes water to lose the same amount of energy to have its temperatures drop by one degree as compared to land. During the night, therefore, this is why adjacent water bodies remain relatively warmer than land.
What is the pOH of a solution with [OH^ - ]=1.4*10^ -13
Answer:
12.9
Explanation:
From the question given, the concentration of the hydroxide ion is given:
[OH^-] = 1.4 x 10^ -13M
pOH =?
pOH = —Log [OH^-]
pOH = —Log 1.4 x 10^ -13
pOH = 12.9
What energy comes in different forms?
Thermal energy
Mechanical energy
Chemical energy
Answer:
electromagnetic
Explanation:
Express in scientific notation. Choose the answer with the proper number of significant figures.
9.10^9
4.5 x 10
The scientific notation for the value [tex]\frac{9 \times 10^9}{4.5 \times 10^1}[/tex] is 2 [tex]\times[/tex] 10 ^8 .
Explanation:
Scientific notation is a method for communicating numbers that are too enormous or too little to even think about being easily written in a decimal structure. To compose a number in scientific notation: Put the decimal after the main digit and drop the zeroes. Now calculating the values in scientific notation using the following formula,a ^x / a^ y = a ^(x − y )
= 9 × 10 ^9 / 4.5 × 10 ^1
= 9 / 4.5 × 10 ^(9 − 1)
= 2 [tex]\times[/tex] 10 ^8
The scientific notation for the value [tex]\frac{9 \times 10^9}{4.5 \times 10^1}[/tex] is 2 [tex]\times[/tex] 10 ^8 .
Which substance is commonly used to produce biomass fuel?
corn stalks
yellowcake
coal
natural gas
Answer:
Corn stalks
Explanation:
Biomass fuel is produced by living or once-living organisms.
The most common biomass fuels used for energy come from plants, such as corn and soy.
B is wrong. Yellowcake is a refined form of uranium ore.
C and D are wrong. Coal and natural gas are not biomass fuels.
The process of changing light energy to chemical energy is
known as...
Photosynthesis
O Cellular Respiration
O Preparation
Chemical Properties
Answer:
Photosynthesis
Explanation:
Photosynthesis:
It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose. The oxygen produced during photosynthesis is used in cellular respiration.
The sun light is converted into chemical energy in the form of sugar.
Word equation:
Carbon dioxide + water + energy → glucose + oxygen
water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture by chloroplast.
Chemical equation:
6H₂O + 6CO₂ + energy → C₆H₁₂O₆ + 6O₂
it is known from balanced chemical equation that 6 moles of carbon dioxide react with the six moles of water and created one mole of glucose and six mole of oxygen.
What is the lewis dot structure for N2Br4?
Answer:
.. ..
..Br- .. .. -BR.. .. N - N .. .. ....Br- - Br.... ..
Explanation:
The Lewis dot structure of N2Br4 is attached below. A Lewis dot structure is also known as a Lewis structure or electron dot structure.
It is a visual representation of the valence electrons in an atom or molecule. It uses dots to represent the valence electrons around the atomic symbol.
The Lewis dot structure is based on the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration with eight valence electrons (except for hydrogen, which typically only requires two valence electrons).
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Calculate the molarity of 0.289 moles of FeCI3 dissolved in 120 ml of solution
Answer:
The molarity is 2, 408M
Explanation:
A solution molar---> moles of solute in 1 L of solution (1000ml):
120ml solution --------0,289 mol FeCl3
1000ml solution-------x= (1000ml solutionx0,289 mol FeCl3)/120 ml solution
x=2,408mol FeCl3--> 2, 408M
Final answer:
The molarity of the FeCl3 solution is 2.41 M.
Explanation:
To calculate the molarity of 0.289 moles of FeCl3 dissolved in 120 ml of solution, we need to convert the volume of the solution to liters. 120 ml is equal to 0.120 L. Molarity is defined as the number of moles of solute divided by the volume of solution in liters. Therefore, the molarity of the FeCl3 solution is:
Molarity = moles of solute/volume of solution
Molarity = 0.289 moles FeCl3 / 0.120 L solution = 2.41 M.
(I)how many atoms are present in 7g of lithium?
(Ii)How many atoms are present in 24g of carbon?
Calculate the number of moles in each of these substances
19g of fluorine, F2
22g of carbon dioxide, CO2
17g of hydroxide, OH- ions
Answer :
(i) The number of atoms present in 7 g of lithium are, [tex]6.07\times 10^{23}[/tex]
(ii) The number of atoms present in 7 g of lithium are, [tex]1.204\times 10^{24}[/tex]
(iii) The number of moles of [tex]F_2[/tex] is, 1 mole
The number of moles of [tex]CO_2[/tex] is, 0.5 mole
The number of moles of [tex]OH^-[/tex] is, 1 mole
Explanation :
Part (i) :
First we have to calculate the moles of lithium.
[tex]\text{Moles of }Li=\frac{\text{Mass of }Li}{\text{Molar mass of }Li}[/tex]
Molar mass of Li = 6.94 g/mole
[tex]\text{Moles of }Li=\frac{7g}{6.94g/mol}=1.008mole[/tex]
Now we have to calculate the number of atoms present.
As, 1 mole of lithium contains [tex]6.022\times 10^{23}[/tex] number of atoms
So, 1.008 mole of lithium contains [tex]1.008\times 6.022\times 10^{23}=6.07\times 10^{23}[/tex] number of atoms
Thus, the number of atoms present in 7 g of lithium are, [tex]6.07\times 10^{23}[/tex]
Part (ii) :
First we have to calculate the moles of carbon.
[tex]\text{Moles of }C=\frac{\text{Mass of }C}{\text{Molar mass of }C}[/tex]
Molar mass of C = 12 g/mole
[tex]\text{Moles of }C=\frac{24g}{12g/mol}=2mole[/tex]
Now we have to calculate the number of atoms present.
As, 1 mole of carbon contains [tex]6.022\times 10^{23}[/tex] number of atoms
So, 2 mole of carbon contains [tex]2\times 6.022\times 10^{23}=1.204\times 10^{24}[/tex] number of atoms
Thus, the number of atoms present in 7 g of lithium are, [tex]1.204\times 10^{24}[/tex]
Part (iii) :
To calculate the moles of [tex]F_2[/tex] :
[tex]\text{Moles of }F_2=\frac{\text{Mass of }F_2}{\text{Molar mass of }F_2}[/tex]
Molar mass of [tex]F_2[/tex] = 38 g/mole
[tex]\text{Moles of }F_2=\frac{19g}{19g/mol}=1mole[/tex]
Thus, the number of moles of [tex]F_2[/tex] is, 1 mole
To calculate the moles of [tex]CO_2[/tex] :
[tex]\text{Moles of }CO_2=\frac{\text{Mass of }CO_2}{\text{Molar mass of }CO_2}[/tex]
Molar mass of [tex]CO_2[/tex] = 44 g/mole
[tex]\text{Moles of }CO_2=\frac{22g}{44g/mol}=0.5mole[/tex]
Thus, the number of moles of [tex]CO_2[/tex] is, 0.5 mole
To calculate the moles of [tex]OH^-[/tex] ions :
[tex]\text{Moles of }OH^-=\frac{\text{Mass of }OH^-}{\text{Molar mass of }OH^-}[/tex]
Molar mass of [tex]OH^-[/tex] = 17 g/mole
[tex]\text{Moles of }OH^-=\frac{17g}{17g/mol}=1mole[/tex]
Thus, the number of moles of [tex]OH^-[/tex] is, 1 mole
1. The number of atoms in 7 g of Li is 6.02×10²³ atoms
2. The number of atoms in 24 g of carbon is 1.204×10²⁴ atoms
3. The number of mole in 19 g of fluorine is 1 mole
4. The number of mole in 22 g of carbon dioxide is 0.5 mole
5. The number of mole in 17 g of Hydroxide ion is 1 mole
1. Determination of the number of atoms in 7 g of lithiumFrom Avogadro's hypothesis,
1 mole of Li = 6.02×10²³ atoms
But,
1 mole of Li = 7 g
Thus,
7 g of Li = 6.02×10²³ atoms
2. Determination of the number of atoms in 24 g of carbonFrom Avogadro's hypothesis,
1 mole of C = 6.02×10²³ atoms
But,
1 mole of C = 12 g
Thus, we can say that
12 g of C = 6.02×10²³ atoms
Therefore,
24 g of C = (24 × 6.02×10²³) / 12
24 g of C = 1.204×10²⁴ atoms
3. Determination of the number of mole in 19 g of fluorine Mass = 19 gMolar mass of fluorine = 19 g/molMole =?Mole = mass / molar mass
Mole of fluorine = 19 / 19
Mole of fluorine = 1 mole
4. Determination of the number of mole in 22 g of carbon dioxide, CO₂Mass = 22 gMolar mass of CO₂ = 12 + (2×16) = 44 g/molMole =?Mole = mass / molar mass
Mole of CO₂ = 22 / 44
Mole of CO₂ = 0.5 mole
5. Determination of the number of mole in 17 g of Hydroxide ion, OH¯Mass = 17 gMolar mass of OH¯ = 16 + 1 = 17 g/molMole =?Mole = mass / molar mass
Mole of OH¯ = 17 / 17
Mole of OH¯ = 1 mole
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