24 molecules of H2O are needed by the plant to produce 4 molecules of sugar.
What is photosynthesis?The process by which plants convert carbon dioxide, water, and sunlight into oxygen and sugar-based energy is known as photosynthesis.
The photosynthesis equation is as follows:6CO2 + 6H2O + Sunlight → C6H12O6 + 6O2
The following three significant activities are involved in photosynthesis:
1. Chlorophyll absorbs light energy.
2. Water molecules are divided into hydrogen and oxygen and light energy is converted to chemical energy.
3. Carbon dioxide is converted to sugars.
Therefore, a plant needs four molecules of H2O and four molecules of CO2 to make one molecule of glucose or sugar, hence a plant needs 24 molecules of H2O and 24 molecules of CO2 to make four molecules of sugar.
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Answer:
D) 24 molecules of H2O
Explanation:
Just did the test on Edge 2023 and got it right. Have a nice day :)
Beverly and Carl are in a race. Their graphs show the data.
A graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). An orange line labeled Beverly starts at 0 seconds 0 meters and goes straight to 10 seconds 15 meters and then to 50 seconds 35 meters. A blue line labeled starts at 0 seconds 0 meters and goes straight to 10 seconds 10 meters and then to 50 seconds 30 meters.
Which best describes the race?
Given the data, the correct statement is
Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s
What is acceleration?This is defined as the rate of change of velocity which time. It is expressed as
a = (v – u) / t
Where
a is the acceleration v is the final velocity u is the initial velocity t is the time How to determine the initial acceleration of BeverlyInitial velocity (u) = 0 m/sFinal velocity (v) = 15 m/sTime (t) = 10 sInitial acceleration (a₁) =?a₁ = (v – u) / t
a₁ = (15 – 0) / 10
a₁ = 1.5 m/s²
How to determine the final acceleration of BeverlyInitial velocity (u) = 15 m/sFinal velocity (v) = 35 m/sTime (t) = 50 - 10 = 40 sFinal acceleration (a₂) =?a₂ = (v – u) / t
a₂ = (35 – 15) / 40
a₂ = 0.5 m/s²
How to determine the initial acceleration of CarlInitial velocity (u) = 0 m/sFinal velocity (v) = 10 m/sTime (t) = 10 sInitial acceleration (a₁) =?a₁ = (v – u) / t
a₁ = (10 – 0) / 10
a₁ = 1 m/s²
How to determine the final acceleration of CarlInitial velocity (u) = 10 m/sFinal velocity (v) = 30 m/sTime (t) = 50 - 10 = 40 sFinal acceleration (a₂) =?a₂ = (v – u) / t
a₂ = (30 – 10) / 40
a₂ = 0.5 m/s²
SUMMARY
Initial acceleration of Beverly = 1.5 m/s²Final acceleration of Beverly = 0.5 m/s²Initial acceleration of Carl = 1 m/s²Final acceleration of Carl = 0.5 m/s²From the above calculations, we can see that Beverly's initial acceleration is higher than that of Carl's and their final acceleration is the same.
Therefore, the correct answer to the question is:
Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s
Complete question
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Answer:
B) hope this helped.
-----------------------------
on edgy 2022
Explanation:
What type of reaction is: ammonium nitrate -> dinitrogen monoxide + water?
A. Double Replacement
B. Combustion
C. Synthesis
D. Decomposition
Answer: Decomposition
Explanation:
Decomposition reactions involve a substance breaking down into simpler substances.
What is the answer to “An element is:”
Answer:
Option A
A pure chemical substance consisting of one type of atom.
Explanation: An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.
An element is defined as a pure chemical substance consisting of one type of atom.
What is an element?
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.There are 118 elements known to exist either naturally or artificially.
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Initial Activity- What mass of solute will dissolve in 100g of water at the following temperatures?
• KNO3 at 70°C =
• NaCl at 100°C=
• NH4Cl at 90°C=
The mass of solute will dissolve in 100g of water at the following temperatures will be 153 gms, 40 gms, 70gms simultaneously.
How dissolution of solute is affected by temperature ?On increasing temperature the amount of solute for dissolution decreases.
It is independent of the nature of solute.
Hence,
KNO₃ at 70degree = 153 gmsNaCl at 100 degree = 40 gmsNH₄Cl at 90 degree = 70gmsLearn more about dissolution here ;
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what must happen for carbon dioxide to sublimate at a given pressure?
a. energy must transfer from the carbon dioxide to its surroundings.
b. the average kinetic energy of the carbon dioxide molecules must
decrease.
o c. the orderliness of the carbon dioxide molecules must increase.
d. energy must transfer to the carbon dioxide from its surroundings.
Answer: d. energy must transfer to the carbon dioxide from its surroundings.
Explanation:
Sublimation is the phase change from a solid to a gas, meaning that the particles will have more kinetic energy (since particles in the solid phase are more ordered than particles in the gas phase, and thus particles in the gas phase have more energy). Thus, for sublimation to occur, the particles need more energy, which must come from its surroundings.
What's the answer to this question? pls find it asap now
Answer:
B. Mixing a few teaspoons of salt into the water
Explanation:
Pure water doesn't contain any ions, therefore it cannot conduct electricity. Adding salt (NaCl) to the water causes the salt to ionize into Na⁺ and Cl⁻ ions, and the movement of the ions completes the circuit, causing the bulb to glow.
A 35. 0-l steel tank at 20. 0?c contains acetylene gas, c2h2, at a pressure of 1. 39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank?.
52.66 grams of acetylene are in the tank.
PV=nRT is the formula for ideal gases, where P is the pressure and R is the constant and T is the temperature (P is 1.39 atm in this case)
Volume = 35.0 L
Gas constant = 0.08206 L.atm/K.mole
Temperature = 20.0 °C = 293 °C
We also know that we can apply the formula ;
Number of mole(n) = [tex]\frac{MmPV}{RT}[/tex]
m = ( 26.04 × 1.39 × 35 )/ (0.08206 × 293.15)
m = 52.66 g
Thus, the mass is 52.66 grams.
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Kajal is a compound or a mixture?
Most alkaline permanent waves have a pH between:
The alkaline permanent waves have a pH between 9.0 to 9.6.
What are Alkaline permanent waves?Alkaline permanent waves are chemical that is apply to the hair. The alkaline perm makes the hair curly or wavy.
The major ingredient is the ammonium thioglycolate and ammonium hydroxide.
The alkaline permanent wave is alkaline in nature and the pH scale for alkaline substances are higher.
pH of 7 depicts neutrality while pH of 7 and above depicts alkalinity.
Therefore, alkaline permanent waves have a pH between 9.0 to 9.6.
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an experiment illustrating fizzy drink production
5.00g of an unknown metal we know has a +2 charge (M^+2) is reacted with an excess of hydrochloric acid (HCl(aq)). The product is dried and weighs 11.35 grams. What is the formula and name of the product formed?
the formula: MCl₂
name of the product formed: chloride salt + hydrogen
A 2. 75-l container filled with co2 gas at 25°c and 225 kpa pressure springs a leak. When the container is re-sealed, the pressure is 185 kpa and the temperature is 10°c. How many moles of gas were lost?.
The number of moles of gas lost is 0.0213 mol. It can be solved with the help of Ideal gas law.
What is Ideal law ?According to this law, "the volume of a given amount of gas is directly proportional to the number on moles of gas, directly proportional to the temperature and inversely proportional to the pressure. i.e.
PV = nRT.
Where,
p = pressure V = volume (1.75 L = 1.75 x 10⁻³ m³)T = absolute temperature n = number of molesR = gas constant, 8.314 J*(mol-K)Therefore, the number of moles is
n = PV / RT
State 1 :
T₁ = (25⁰ C = 25+273 = 298 K)p₁ = 225 kPa = 225 x 10³ N/m²State 2 :
T₂ = 10 C = 283 Kp₂ = 185 kPa = 185 x 10³ N/m²The loss in moles of gas from state 1 to state 2 is
Δn = V/R (P₁/T₁ - P₂/T₂ )
V/R = (1.75 x 10⁻³ m³)/(8.314 (N-m)/(mol-K) = 2.1049 x 10⁻⁴ (mol-m²-K)/N
p₁/T₁ = (225 x 10³)/298 = 755.0336 N/(m²-K)
p₂/T₂ = (185 x 10³)/283 = 653.7102 N/(m²-K)
Therefore,
Δn = (2.1049 x 10⁻⁴ (mol-m²-K)/N)*(755.0336 - 653.7102 N/(m²-K))
= 0.0213 mol
Hence, The number of moles of gas lost is 0.0213 mol.
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A 25.0 g sample of metal at
16.0 °C is warmed to 22.1 °C
by 259 ] of energy.
What is the change in temperature
for the metal?
Record your answer to the tenths place.
The change in temperature of the metal is 6.1°C. Details about change in temperature can be found below.
How to calculate change in temperature?The change in temperature of a substance can be calculated by subtracting the initial temperature of the substance from the final temperature.
According to this question, a 25.0 g sample of metal at 16.0 °C is warmed to 22.1 °C by 259J of energy.
This means that the change in temperature of the metal can be calculated as:
∆T = 22.1°C - 16°C
∆T = 6.1°C
Therefore, the change in temperature of the metal is 6.1°C.
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Answer: 6.1°C.
Explanation: just for some extra verification, the answer is indeed 6.1°C. Hope this helps and have a great day!
The theoretical yield of NaBr from
2.36 mol FeBr3 is 7.08 mol NaBr.
What is the percent yield if 6.14 mol
NaBr were collected?
[?]%
the percent yield of the reaction is 100%.
The percent yield is calculated as the experimental yield divided by the theoretical yield x 100%:
% yield = actual yield / theoretical yield * 100%
% yield of a reaction in this case Rate
In this case, the molar mass of NaBr is 102.9 g / mol, as you know:
444 actual yield = 7.08 mol x 102.9 g / mol = 728.532 g
theoretical yield = 7.08 mol x 102.9 g / mol = 728.532 g
, Replaced by the definition of percent yield:
percent yield = 728.532 grams / 728.532 grams * 100%
percent yield = 100%
Finally, the percent yield of the reaction is 100%.
FeBr3 is iron bromide. Also known as iron bromide. Iron bromide is an ionic compound in which iron is in a +3 oxidation state.
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Answer: 87%
Explanation:
as a nail approaches the south pole of a magnet, what happens to its magnetic domains?
A. The north poles of the domains point toward the magnet.
B. The south poles of the domains point toward the magnet.
C. The domains spin, but end up in no particular pattern.
D. The domain remain unaffected by the magnet.
The domain remain unaffected by the magnet is the right answer.
What happens to its magnetic domains?Both the north poles and the south poles of the domains point toward the magnet so the domains is unaffected by the magnet as the nail approaches to the south pole of a magnet.
So we can conclude that the domain remain unaffected by the magnet is the right answer.
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Answer. The domain remain unaffected by the magnet
Why do lunar and solar eclipses not happen every month?
Rafa then places some zinc in a solution of lead nitrate. A displacement
reaction takes place. Write the word equation for this reaction.
Answer:
Explanation:
A solution of zinc metal and lead nitrate react to form zinc nitrate and lead metal.
Zn(s) + Pb(NO3)2 = Zn(NO3)2 + Pb
Short Response
Directions: Base your answers to questions 6 and 7 on the information below and your knowledge of chemistry.
Ammonia, NH3(g), can be used as a substitute for fossil fuels in some internal combustion
engines. The reaction between ammonia and oxygen in an engine is represented by
the unbalanced equation below.
NH3(g) + O₂(g) → N₂(g) + H₂O(g) + energy
6. Balance the equation in the space below for the reaction of ammonia and oxygen, using the
smallest whole-number coefficients.
7. Show a numerical setup for calculating the mass, in grams, of a 4.2-mole sample of 0₂. Use 32
g/mol as the gram-formula mass of 0₂.
Answer:
6.)
7.) 134.4 g O₂
Explanation:
The unbalanced equation:
NH₃ (g) + O₂ (g) ---> N₂ (g) + H₂O (g) + energy
Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen
Products: 2 nitrogen, 2 hydrogen, 1 oxygen
The balanced equation:
4 NH₃ (g) + 3 O₂ (g) ---> 2 N₂ (g) + 6 H₂O (g) + energy
Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen
Products: 4 nitrogen, 12 hydrogen, 6 oxygen
To convert from moles to grams, you need to multiply the starting value (4.2 moles) by the molar mass (32.00 g/mol). The molar mass can serve as a conversion because it technically means there are 32.00 grams O₂ per every 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (the desired unit should be in the numerator).
4.2 moles O₂ 32.00 g
-------------------- x ---------------- = 134.4 g O₂
1 mole
0.467 mol NaCl are needed to
create a 0.875 m solution using 534
g of water. How many grams of
sodium chloride are required to
make the solution?
Answer:
27.4 gram is the solution it's simple dude...
Explanation:
don't be afraid of huge question they confuse you you need not to be confused
now see simple solution
molality is denoted by m
so
m= moles of solute / mass of solvent in kg.
i hope your know the meaning of solute and solvent....
so moles are given 0.467
and molar mass is given 58.44
so just take out the gram means
by applying formula
58.44×0.467
it will give 27.4 grams simple.....
why do crystals form during crystallisation
Answer: Crystallization is a technique which chemists use to purify solid compounds. Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. The process is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.
∩_∩
(„• ֊ •„)♡
┏━∪∪━━━━┓
hope it helped
┗━━━━━━━┛
As the solution cools, the solvent can no longer hold all of the solute molecules, and they begin to leave the solution and form solid crystals.
During this cooling, each solute molecule in turn approaches a growing crystal and rests on the crystal surface.
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How many grams of water are
produced from the complete
reaction of 12.25 moles
hydrogen, H2?
CO + 3H₂ → H₂O + CH4
[?] g H₂O
The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is 73.5 g water
What is hydrogen gas used for?Hydrogen can be used in fuel cells to generate electricity, or power and heat.
Today, hydrogen is most commonly used in petroleum refining and fertilizer production, while transportation and utilities are emerging markets.
As according to given chemical equation,
3 moles of H₂ produces 1 mole (18 g) of water
Therefore,
The weight of water produced by 12.25 mole of hyrdogen will be ;
= 18 / 3 x 12.25 = 73.5 g water
Hence , The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is 73.5 g water
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How many molecules are contained in 1.55 moles of methane, CH 4 ?
Avogadro's law states that in one mole of a substance, there are [tex]6.022 \times 10^{23}[/tex] molecules.
This means that in 1.55 moles, there are [tex]1.55(6.022 \times 10^{23})=\boxed{9.33 \times 10^{23} \text{( to 3 sf)}}[/tex]
Sulfuric acid is an important industrial chemical that
is usually produced by a series of reactions. One of
these involves an equilibrium between gaseous sulfur
dioxide, oxygen, and sulfur trioxide.
2 SO₂(g) + O₂(g) 2 SO₂(g)
If 2.5 mol of sulfur dioxide gas and 2.0 mol of
oxygen gas are placed in a sealed 1.0 L container
and allowed to reach equilibrium, 0.75 mol of sulfur
dioxide remains. Use an ICE table to determine the
concentration of the other gases at equilibrium.
The concentration of sulphur dioxide = 0.75 mol/litre, The concentration of Oxygen is 1.125 mol/litre, The concentration of sulphur trioxide is 1.75 mol/l.
What is a Balanced Equation ?A equation in which the atoms of each element in the reactants and the products are same is called Balanced Equation .
The equation given is
2 SO₂(g) + O₂(g) 2 SO₃(g)
The initial moles of sulphur dioxide gas = 2.5 mol.
Initial Moles of Oxygen is 2 moles
The moles of sulphur dioxide gas at equilibrium is 0.75 mol
The mole ratio of sulphur dioxide to oxygen is 2:1
The mole ratio of sulphur dioxide to sulphur trioxide is 1 :1
The used up moles of sulphur dioxide is
2.5 - 0.75 = 1.75 mol
The oxygen required by 1.75 mole is 0.875 mol
The oxygen at equilibrium will be
2 -0.875
1.125 mol
The sulphur trioxide formed from 1.75 mol of sulphur dioxide at the equilibrium will be 1.75 mol.
Concentration = moles / Volume
Volume = 1L
Therefore the concentration of sulphur dioxide = 0.75 mol/litre
The concentration of Oxygen is 1.125 mol/litre
The concentration of sulphur trioxide is 1.75 mol/l.
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A container with a volume 2.0 L is filled with a gas at a pressure of 1.5 atm. By decreasing the volume of the container to 1.0 L, what is the resulting pressure? Type in your answer using the correct number of significant figures. Remember to use the formula for Boyle's law: P1V1 = P2V2
After reducing the starting volume, the gas has a resultant pressure of 3 atm.
Describe Boyle's Law.
Boyle's Law states that a gas's pressure is inversely proportionate to its volume at constant temperature:
P ∝ 1/V
The necessary equation for the posed question is:
P1V1 = P2V2, and
Initial pressure is P1 and is 1.5 atm.
Initial volume = 2 L for V1.
final pressure = P2 =?
Final volume = 1 L, or V2.
Using the aforementioned equation and all of these data, we obtain
P₂ = [tex]\frac{(1.5x2)}{1}[/tex]= 3atm
Therefore, 3 atm of pressure is needed.
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The 9.6 g object displaced
3.2 mL of water.
What is its density in g/mL?
density=[?] g/mL
Answer: 3
Explanation:
Density is mass/volume divide the mass 9.6 by the volume of 3.2
[tex]\frac{9.6}{3.2} =3[/tex]
The density of the object displaced in water is equal to 3 g/ml.
What is the density?The density of a substance can be described as the substance's mass per unit of its volume. The symbol is generally used to represent density ρ and the letter D can be used.
The mathematical formula of the density of a material can be represented as shown below:
Density = Mass/volume
ρ = m/V
The density of a material varies with pressure as well as temperature. There is a small variation in the density of the solids and liquids but much larger for gases. Increasing the pressure of the substance decreases the volume and thus increases its density.
As the object displaced water of volume of 3.2 ml.
Therefore, the volume of the object, V = 3.2 ml
The mass of the object, m = 9.6 g
The density of the object placed in water can be calculated as:
Density of object = 9.6/3.2 = 3 g/ml
Therefore, the density of the object is 3 g/ml.
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The pH of a solution is measured as 8.3. What is the hydrogen ion
concentration of the solution?
OA. 2.0 x 108 M
OB. 8.0 x 10-³ M
OC. 8.3 M
OD. 5.0 x 109 M
Answer:
D.) 5.0 x 10⁻⁹ M
Explanation:
The formula displaying the relationship between pH and hydrogen ion concentration is:
pH = -log[H⁺]
In this formula "[H⁺]" represents the concentration of hydrogen ions (given in molarity (M)). Therefore, to find this value, you need to take the inverse of the log. The manipulation looks like this:
pH = -log[H⁺] ------------> [H⁺] = 10^-pH
Note that the carrot (^) represents an exponent. Now, you can plug your pH value into the equation to find the molarity.
[H⁺] = 10^-pH
[H⁺] = 10^-8.3
[H⁺] = 5.0 x 10⁻⁹ M
Based on the equation, how many grams of Br2 are required to react completely with 42.3 grams of AlCl3?
2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2
66.5 grams
71.2 grams
76.1 grams
80.2 grams
Answer:
C.) 76.1 grams
Explanation:
To find the mass of bromine, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass), then (2) convert moles AlCl₃ to moles Br₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Br₂ to grams Br₂ (via molar mass). It is important to arrange your ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).
Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)
Molar Mass (AlCl₃): 133.332 g/mol
2 AlCl₃ + 3 Br₂ --> 2 AlBr₃ + 3 Cl₂
Molar Mass (Br₂): 2(79.904 g/mol)
Molar Mass (Br₂): 159.808 g/mol
42.3 g AlCl₃ 1 mole 3 moles Br₂ 159.808 g
------------------ x ----------------- x ---------------------- x ------------------- =
133.332 g 2 moles AlCl₃ 1 mole
= 76.0 g Br₂
*Our answers are slightly different most likely because we used slightly different molar masses*
Give some examples of what are sand good for explaining is involved!
Explanation:
The definition of a god is an image, person or thing that is worshiped, honored or believed to be all-powerful or the creator and ruler of the universe. An example of a god is Ganesha, a Hindu diety.
Fluorite is..
a. harder than apatite but softer than calcite
b. harder than gypsum but softer than apatite
c. harder than calcite but softer than feldspar
d. harder than feldspar but softer than apatite
Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.
What is the hardness of any element?The hardness of any element may be defined as the capability of a material to oppose the process of deformation and remains in actual shape precisely.
According to the table of hardness scales by Mohs, the increasing order of given hardness of given elements is as follows:
Gypsum < Fluorite < Apatite.
Therefore, Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.
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Find the total surface area of the rectangular prism in the figure. A) 174 cm^ 2 B) 522c * m ^ 2; 348c * m ^ 2 D) 432c * m ^ 2
[tex]\huge\textbf{Hey there!}[/tex]
[tex]\huge\textbf{Better understanding of the lesson}[/tex]
[tex]\text{Formula for finding the area of rectangular prism: \boxed{\mathsf{2(wl + hl + hw) = a}}}\\\text{Whereas, \bf l = \underline{length}, w = \underline{width}, h = \underline{height.}, and a = \underline{area}}[/tex]
[tex]\huge\textbf{Now, let's solve for the given equation}[/tex]
[tex]\mathsf{a = 2\times(8\times6 + 9\times6 + 9\times8)}[/tex]
[tex]\mathsf{a = 2\times(48 + 54 + 72)}[/tex]
[tex]\mathsf{a = 2(48) + 2(54) + 2(72)}[/tex]
[tex]\mathsf{a = 96 + 108 + 144}[/tex]
[tex]\mathsf{a = 204 + 144}[/tex]
[tex]\mathsf{a = 348}[/tex]
[tex]\huge\textbf{Therefore, your answer is: \boxed{\mathsf{348\ cm^2}}}\huge\checkmark[/tex]
[tex]\huge\textbf{Good luck on your assignment \& enjoy}\\\huge\textbf{your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
