That is actually physics because it talks about motion.
If you can answer this question I will mark you BRAINLIEST
Answer:
cause the ectonic plates moving are what made
Explanation:
calculate the mass of hydrogen in a ballon 10m in diameter filled with hydrogen at a pressure of 1 stm and a temperature of 27·C
The mass of hydrogen in the balloon 10m in diameter is 0.419 grams.
To calculate the mass of hydrogen in a balloon with a 10m diameter, filled at a pressure of 1 standard atmosphere and a temperature of 27°C, we can use the ideal gas law.
Convert the diameter of the balloon to its radius:
Radius = Diameter / 2
= 10 m / 2
= 5 m
Calculate the volume of the balloon:
Volume = (4/3) * π * (\(Radius^{3}\))
Volume = (4/3) * 3.14159 * (\(5^{3}\)) = 523.599 m³
Convert the temperature from Celsius to Kelvin:
Kelvin temperature = Celsius temperature + 273.15
Kelvin temperature = 27°C + 273.15 = 300.15 K
Convert the pressure to Pascals (Pa):
1 atm = 101325 Pa
Determine the number of moles of hydrogen using the ideal gas law:
PV = nRT
n = PV / RT
Where:
P = Pressure = 1 atm = 101325 Pa
V = Volume = 523.599 m³
R = gas constant = 8.314 J/(mol·K)
T = Temperature = 300.15 K
n = (101325 Pa) * (523.599 m³) / ((8.314 J/(mol·K)) * (300.15 K))
n ≈ 21927.41 mol
Convert moles to grams using the molar mass of hydrogen:
Molar mass of hydrogen (H₂) = 2 g/mol
Mass of hydrogen = n * (Molar mass of hydrogen)
Mass of hydrogen = 21927.41 mol * 2 g/mol
Mass of hydrogen ≈ 43854.82 g
Therefore, the mass of hydrogen in the balloon 10m in diameter is 0.419 grams.
know more about hydrogen here:
https://brainly.com/question/24433860
#SPJ11
A weather balloon is filled with 14.9 L helium at sea level where the pressure is 1.00 atm at 20.0 °C. The balloon bursts after ascending until the pressure is 26.0 torr at -50.0 °C. Determine the volume (in L) at which the balloon bursts.
The volume at which the balloon bursts is 150.7 L.
To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas.
The combined gas law is expressed as:
(P1 x V1) / (T1) = (P2 x V2) / (T2)
We can convert the initial pressure to torr by multiplying by 760 torr/1 atm, and convert the temperatures to Kelvin by adding 273.15 to the Celsius temperatures.
Substituting the given values into the equation, we get:
(1.00 atm x 14.9 L) / (293.15 K) = \((26.0\ torr *V2) / (223.15 K)\)
Solving for V2, we get:
V2 = \((1.00\ atm * 14.9 L * 223.15 K) / (293.15 K * 26.0\ torr)\)
= 150.7 L
Therefore, the volume at which the balloon bursts is 150.7 L.
To know more about combined gas law, here
brainly.com/question/30458409
#SPJ1
the current wave mechanical model of the atom has electrons in clouds orbitals around the nucleus
The current wave mechanical model of the atom describes electrons in clouds called orbitals that surround the atomic nucleus is based on principles of quantum mechanics .
This model emphasizes the wave-like properties of electrons. In contrast to the earlier Bohr model, which proposed that electrons move in well-defined paths around the nucleus.
The wave mechanical model suggests that electrons do not possess precise trajectories but instead occupy regions of space with varying probabilities. These regions are mathematically represented by wave functions or orbitals.
This model provides a more precise depiction of electron behavior, facilitating a better understanding of phenomena like electron energy levels, electron-electron interactions, and chemical bonding.
learn more about wave mechanical model :
https://brainly.com/question/15660887
the current wave mechanical model of the atom has electrons in clouds orbitals around the nucleus, on which principle does this phenomenon is based .
Practice: Determine the products, balance the
equation, and identify as organic or inorganic combustion reaction (circle).
1)
Ca + O2
Inorganic or Organic combustion?
2)
C3H2O +
02
Inorganic or Organic combustion?
1. Inorganic combustion
2. Organic combustion
Further explanationGiven
The chemical equations
Required
Balanced equation
Solution
Organic compounds have the characteristic that there is a chain of carbon atoms, while inorganic does not have a chain of carbon atoms
The reaction of a substance with oxygen is called a combustion reaction
Complete combustion of carbon compounds will get CO₂ gas, whereas if it is not complete it will produce CO gas
So Organic : contain a carbon atom (and often a hydrogen atom)
1. Ca + O₂ ⇒ CaO₂
Inorganic combustion⇒does not contain carbon
2. C₃H₂O + 3O₂ → 3CO₂ + H₂O
Organic combustion
A chemist needs to determine the concentration of a sulfuric acid solution by titration with a standard sodium hydroxide solution. He has a 0.1463 M
standard sodium hydroxide solution. He takes a 25.00 mL
sample of the original acid solution and dilutes it to 250.0 mL.
Then, he takes a 10.00 mL
sample of the dilute acid solution and titrates it with the standard solution. The endpoint was reached after the addition of 18.47 mL
of the standard solution. What is the concentration of the original sulfuric acid solution?
The concentration of the original sulfuric acid solution is 0.05398M
In order to determine the concentration of the original sulfuric acid solution, we use the volume of the standard sodium hydroxide solution used in the titration along with the concept of stoichiometry.
Let us check the number of moles of sodium hydroxide (NaOH) used in the titration,
Moles of NaOH = Molarity of NaOH x Volume of NaOH
=0.1463M x 18.47 mL
= 0.002699 Moles
As the balanced chemical equation between Sulfuric acid (\(H_SO_4\)) and sodium hydroxide is 1:2, then we can deduct that 1 mole of sulfuric acid can react with 2 moles of sodium hydroxide.
In that case, the number of moles of sulfuric acid in the 10.00 mL sample is;
Moles of \(H_2SO_4\) = 0.002699 Moles x (1/2)
= 0.0013495 Moles
Now we can calculate the concentration of the original sulfuric acid solution:
That is, the concentration of \(H_2SO_4\) = Moles of \(H_2SO_4\) / Volume of original acid solution
=0.0013495 Moles / 0.02500L
=0.05398 M
Therefore, the concentration of the original sulfuric acid solution is approximately 0.05398 M.
To learn more about sulfuric acid,
https://brainly.com/question/10220770
Under what conditions is n2o3 No gas + n02 gas
spontaneous?
The reaction is spontaneous under conditions of low pressure and high temperature
What is a spontaneous reaction?We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.
The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.
Learn more about decomposition reaction:https://brainly.com/question/16987748
#SPJ1
What is the mass of percent of 10 g solute in 105 g solvent?
The mass of the percent of the 10 g solute in the 105 g solvent is 8.69 %.
The mass of the solute = 10 g
The mass of the solvent = 105 g
The mass of the solution = 10 g + 105 g
The mass of the solution = 115 g
The mass of the percent is expressed as :
The mass of percent = ( mass of solute / mass of solution ) × 100 %
The mass of solute = 10 g
The mass of solution = 115 g
The mass of percent = ( 10 / 115 ) × 100 %
The mass of percent = 8.69 %
Thus, the mass of percent is 8.69 % and the mass of solute is 10 and the mass of the solution is 115 g.
To learn more about mass of percent here
https://brainly.com/question/30742204
#SPJ1
once heating is complete, you will recover the product by scraping off the solid that sticks to the aluminum wire and weigh it. What is the name of the substance
The name of the substance that is recovered by scraping off the solid that sticks to the aluminum wire after heating is complete will depend on the specific experiment or reaction being conducted.
What depends on specific experiment or reaction?For example, if the experiment involved heating a mixture of sodium chloride and sulfuric acid, the solid that is recovered would be sodium sulfate. If the experiment involved heating copper carbonate, the solid that is recovered would be copper oxide. Similarly, if the experiment involved heating a mixture of iron filings and sulfur, the solid that is recovered would be iron sulfide.
In general, the name of the substance recovered after heating will be the product of the reaction that occurred during the heating process. It is important to carefully follow the instructions for the experiment and use appropriate safety precautions, such as wearing gloves and eye protection, when handling chemicals and conducting experiments in a laboratory setting.
Read more about substance
brainly.com/question/24647756
#SPJ1
How many moles are in 86.8g of Na2O
Answer:
77.53 g of Na₂O is the answer to your question
Why should we conserve energy and what are a few ways to do so?
Answer:
we should conserve energy the reason are in the points
To less power plants
To promote health
To reduce dependence
To finite resources
To make a positive impact
Write a balanced equation for the single-displacement reaction of Al(s) with CuSO4(aq). Include states of matter in your answer.
Answer:
2 Al(s) + 3 CuSO₄(aq) ⇒ 3 Cu(s) + Al₂(SO₄)₃(aq)
Explanation:
Let's consider the single displacement reaction of Al(s) with CuSO₄(aq). Copper has a higher reduction potential than aluminum, so aluminum will take the place of copper to form aluminum sulfate and metallic copper. The corresponding balanced chemical equation is:
2 Al(s) + 3 CuSO₄(aq) ⇒ 3 Cu(s) + Al₂(SO₄)₃(aq)
The chemical equation is 2 Al(s) + 3 CuSO₄(aq) ⇒ 3 Cu(s) + Al₂(SO₄)₃(aq)
Chemical equation:
here we considered the single displacement reaction of Al(s) with CuSO₄(aq). Also, Copper contained a higher reduction potential as compared to aluminum, due to this aluminum will take the place of copper to create aluminum sulfate and metallic copper. So the above should be the balance chemical equation.
Learn more about reaction here: https://brainly.com/question/4417455
10. When dissolved in water, most Group 1 metal salts can be described as
strong electrolytes.
strong acids.
weak electrolytes.
A
B
C
D
non-electrolytes.
(1)
When dissolved in water, most Group 1 metal salts can be described as strong electrolytes.
When Group 1 metal salts are dissolved in water, they can be described as strong electrolytes. This is because Group 1 metals, such as lithium (Li), sodium (Na), potassium (K), and so on, readily lose their outermost valence electron to form positive ions (cations). These cations then dissociate completely in water, separating from the anions to which they were originally bonded.
The dissociation of Group 1 metal salts in water results in the formation of positively charged metal ions and negatively charged non-metal ions (anions). These ions are free to move and conduct electric current, making the solution a good conductor of electricity. The complete dissociation of Group 1 metal salts in water and the presence of freely moving ions make them strong electrolytes.
Strong electrolytes are substances that ionize completely or almost completely in solution, producing a high concentration of ions. This is in contrast to weak electrolytes, which only partially ionize and produce a lower concentration of ions.
In summary, when Group 1 metal salts are dissolved in water, they form strong electrolytes due to their ability to dissociate completely into ions, leading to a high concentration of freely moving ions in the solution, thus enabling efficient electrical conductivity.
Know more about Group 1 metal salts here:
https://brainly.com/question/13277375
#SPJ8
Which property could be used to separate a mixture of salt and water?
A. boiling point
B. mass
C. electrical conductivity
D. magnetism
Answer:
boiling points
Salt water: Salt can be separated from the water by boiling, taking advantage of the different boiling points of the two substances.
all the questions 1. What contribution did de Broglie make to the development of the modern model of the atom? (A)Observed the effect of bombarding thin gold foil (and other metal foils) with alpha radiation from radioactive substances. 60 m B. Discovery of the nucleus C. Discovered that atoms and molecules emit energy only in certain discrete quantities, or quanta. D. Discovered negatively charged particles by cathode ray tube experiment E. Described the wave properties of particles
De Broglie contributed to the development of the modern model of atoms by describing the wave properties of particles. Option E.
De Broglie's contribution to atomic theoryLouis de Broglie was a French physicist who made significant contributions to the development of quantum mechanics.
In his doctoral thesis, he proposed that particles, such as electrons, have both particle-like and wave-like properties. This idea became known as wave-particle duality and laid the foundation for the development of the modern model of the atom.
According to de Broglie's theory, particles can exhibit wave-like behavior and have a wavelength that is inversely proportional to their momentum.
This theory was later experimentally confirmed in a series of experiments that demonstrated the diffraction of electrons and other particles.
More on de Broglie can be found here: https://brainly.com/question/17295250
#SPJ1
A population of comb jellies has members that show two distinct traits. One part of the population has male comb jellies that use a complex bioluminescence pattern to attract females. Another part of the population has male and female comb jellies that produce light in quick flashes. A new animal that preys on comb jellies enters the area.
Using Table 1, which statement describes the most probable change in the comb jelly population over time due to the introduction of the new predator?
A
Only comb jellies whose genes mutate to no longer glow will survive and pass on this trait.
B
The comb jellies that have the most complicated patterns will survive to pass on this trait.
C
The comb jellies that are able to glow in quick flashes will survive and pass on this trait.
D
The two types of comb jellies will have an equal chance to survive and pass on their traits.
When more predators prey on glowing rabbits as a result of the slow-glow gene, the odds of rabbit children inheriting bioluminescence would gradually decline.
What is the origin of bioluminescence?A chemical process that results in the production of light energy inside an organism's body causes bioluminescence. A species must include luciferin, a molecule that creates light when it interacts with oxygen, for a reaction to take place.
Just how uncommon is bioluminescence?Only fireflies, a few types of mushrooms, glowworms, & a few other creatures exhibit bioluminescence on land. Bioluminescent marine life, however, produces an underwater light display. A MBARI study found that 75% of deep-sea organisms produce their own light.
To know more about Bioluminescence visit:
https://brainly.com/question/15622707
#SPJ1
Answer:a
Explanation:
Fluorine exerts a pressure of 58 atm on a piston. When the pressure is changed to 89 atm, its volume is 64 mL. What was the original volume in mL?
We assume an isothermal and closed system, that is to say that there is no change in temperature and that no matter enters or leaves, therefore the number of moles remains constant.
We have an initial state and a final state. For the final state we are given the pressure and the volume. Using the ideal gas law we can find the relationship between moles and temperature. Since these two properties remain constant we can replace the relation in the initial state and find the volume of the fluorine.
Initial state:
P1= 58 atm
V1=?
Final state:
P2=89atm
V2=64 mL
So let's see what the ideal gas law is:
\(PV=nR_{}T\)Where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is a constant
So, we have:
\(\begin{gathered} P_1V_1=nR_{}T \\ P_2V_2=nR_{}T \\ \end{gathered}\)We can equal both equations:
\(P_1V_1=P_2V_2\)We clear V1, and replace known data:
\(\begin{gathered} V_1=\frac{P_2V_2}{P_1} \\ V_1=\frac{89\text{atm}\times64mL}{58atm}=98mL \end{gathered}\)The original volume in mL was 98mL
Becca is a forensic technician analyzing the fragments of a window. She sees that there is a hole in the window, and that the outside hole is smaller than the inside hole. What might she deduce from this information?
The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:
The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.
The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.
The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.
Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
For more question on observation
https://brainly.com/question/29521469
#SPJ8
What is the mass of 3.75 moles of NaCI? ( Na= 22.99g/mol, CI= 35.45 g/mol)
Answer:
219.15 grams
Explanation:
What is the mass of 3.75 moles of NaCI? ( Na= 22.99g/mol, CI= 35.45 g/mol)
Mole of Na = 22.99g
Mole of Cl = 35.45g
For NaCl we have ratio of 1:1, so we have 1 Na for every Cl
So we just add the two together to get the molar mass of NaCl which is
22.99 + 35.45 = 58.44g/mol
And we know we have 3.75 moles of NaCl so we multiply that by the molar mass of NaCl to get our answer
3.75 x 58.44 = 219.15grams
What kind of element has more than 4 valence electrons?
Net ionic equation for potassium sulfide and magnesium iodide
The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.
To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.
Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):
K2S -> 2K+ + S2-
Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):
MgI2 -> Mg2+ + 2I-
Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):
K+ + I- -> KI
Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):
Mg2+ + S2- -> MgS
Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:
2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS
To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).
Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:
S2- + Mg2+ -> MgS
For more such questions on ionic equation visit:
https://brainly.com/question/25604204
#SPJ8
PLEASE HURRY I WILK TIVE BRAINYEST
What is the weather like in a temperate grassland? (Select all that apply.)
A) summers are mild to hot
B) winters are cold
C) summers are cool
D) winters are mild
Answer:
A. Summers are mild to hot, B. Winters are cold.
Balance the redox reaction:Cr2O7^2-+C2O4^2---->Cr^3++CO2
First let's discover which element is oxidizing and which is reducing
So first let's rewrite the equation here:
Cr2O7^2- + C2O4^-2----> Cr^3+ + CO2
Reactant side:
oxidation state for Cr:
2x + (-2x7) = -2
x = +6
oxidation state for C:
2x + [4x(-2)] = -2
x = +3
Product side:
Cr - +3
oxidation state for C:
x + [2x(-2)] = 0
x = +4
A 2135 ml sample of N₂ has a pressure of 95.4KPa at 135°C. What is the volume of the sample if temperature is
increased to 223°C and the pressure is kept constant?
B. 2595 ml
A. 913 ml
C. .3484 ml
D. 900 ml
Answer:
The correct answer is C: 3484 ml
While performing a blatant flop togain a foul called on the opposing team, LeBron James scrapes his knee and begins to bleed. His personal doctor bursts ontothe court with hydrogen peroxide (H2O2) in to clean up his wound. If the doctor applied 6.43 x 1029 molecules of hydrogen peroxide to the infected area, how many grams of hydrogen peroxide (H2O2) were used?
A)3.14 g H2O2B)1.317 x 1055g H2O2C)3.63 x 107 g H2O2D)1.138 x 1052g H2O
Answer:
i hope u find what your looking for
what are thetypes of luminous flame
Types of luminous flames:
1. Yellow Luminous Flame
2. Smoky Luminous Flame
3. Orange Luminous Flame
4. Blue Luminous Flame
Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:
1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.
2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.
3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.
4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.
It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.
for more questions on luminous
https://brainly.com/question/27163038
#SPJ8
Express the following in liters at STP:
4.83 x 10^-3 moles HF
Considering the definition of STP conditions, 4.83 × 10⁻³ moles of HF will occupy a volume of 0.108192 L at STP.
STP conditionsThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases, and 1 mole of any gas occupies an approximate volume of 22.4 liters.
Volume in this caseIn this case, you have 4.83×10⁻³ moles of HF. You can apply the following rule of three: if by definition of STP conditions 1 mole of HF occupies a volume of 22.4 liters, 4.83×10⁻³ moles occupies how much volume?
volume= (4.83×10⁻³ moles ×22.4 L)÷ 1 mole
volume= 0.108192 L
Finally, there is a volume of 0.108192 L at STP.
Learn more about STP conditions:
brainly.com/question/17915431
#SPJ1
To write a number in scientific notation:
a.)move the decimal place until there is a number between one and ten
b.) Write x 10 to the right of the number
C.)count the number of times the decimal had to move and write this as an exponent
D) if it was a BIG number, it should be positive if it was a small number (less than 1) it should be negative
3.00 x 108 m/s should be written in scientific notation. Medical Notation (numbers less than 1.0) Add a decimal place after the decimal, to the right. To the left of the decimal point, there should only be one number. The brand-new number ranges from 1.0000 to 9.9999.
How to write a number in scientific notation?For the purpose of providing an exact result, certain elements of scientific notation must be included. In scientific notation, all numbers have the format "m x 10n. Important components for determining the scientific notation include the following:
Decimal: You move the decimal a specific number of times to the right or left of the coefficient to discover the scientific notation until it becomes a number equal to or greater than one and less than 10.
Coefficient: To calculate this value, the decimal point must move a predetermined amount of times. An amount that is one or larger and less than ten is referred to as a coefficient.
Base: The base number is always 10. The exponent comes into play when multiplying to arrive at the final solution.
Learn more about scientific notation here: https://brainly.com/question/6459088
#SPJ1
Zoe left her water bottle capped and in her bedroom. She came back some time later to realize that the bottle was “sweating” and left a ring of liquid on her nightstand
Explain thoroughly the science behind why Zoe’s water bottle is sweating
Answer:
Condensation
Explanation:
Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.
Now balance the chemical reaction by providing the correct coefficients:
Answer: 2 Al + 3 Cl₂ → 2 AlCl₃
Explanation:
To balance equations, you want to have the same amount of each element. We know 2 Al + 3 Cl₂ → 2 AlCl₃ is the balanced equation because there are equal amounts of each element on both sides. There are 2 Al and 6 Cl.