Answer:
P₂ = 0.11 atm
Explanation:
Given data:
Initial pressure = 0.12 atm
Initial temperature = 294 K
Final pressure = ?
Final temperature = 273 K
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
0.12 atm / 294 K = P₂/273 K
P₂ = 0.12 atm × 273 K / 294 K
P₂ = 32.76 atm. K /294 K
P₂ = 0.11 atm
PLZ HELP MEEE PLZ WILL GIVE BRAINLIEST PLZ!
Is paper a pure substance or a mixture and is it an element or compound then is it homogenous or heterogenous Thank you!!
What mass of aluminum is produced by the decomposition of 5.0 kg A l 2O 3? How many moles of oxygen are produced?
mass of Aluminum produced = = 2.647 kg
moles of Oxygen = 73.53 moles
Further explanationGiven
5.0 kg Al₂O₃
Required
moles of Oxygen
Solution
The aluminum oxide gets decompose into aluminum and oxygen gas.
Reaction :
2Al₂O₃(s)⇒ 4 Al(s) + 3O₂(g)
mol of Al₂O₃(MW=102 g/mol) :
= mass : MW
= 5000 g : 102 g/mol
= 49.02 moles
From the equation, mol ratio of Al₂O₃ : O₂ = 2 : 3, sol mol O₂ :
= 3/2 x mol Al₂O₃
= 3/2 x 49.02
= 73.53 moles
mol Al :
= 4/2 x mol Al₂O₃
= 2 x 49.02
= 98.04 moles
Mass Al :
= mol x Ar Al
= 98.04 x 27 g/mol
= 2647.08 g
= 2.647 kg
Can someone please help me with this quickly thank you
How much heat energy is required to raise the temperature of 386 grams of aluminum from 24.0°C to 100.0°C?
Answer:
is there no options?
Explanation:
Answer:
26.314KJ
Explanation:
The specific heat capacity formula is : [tex]Q=mc[/tex]Δ[tex]T[/tex], where Q is the heat energy, m is the mass, c is the heat capacity of the material, and delta T is the change in temperature.
We know from the question that m = 386grams and delta T = 100.0°C - 24.0°C = 76.0°C. From a simple search, we know the specific heat capacity of aluminum = 0.897J/g°C (this changes a little bit depends on the website you use, but the value should be very similar). Let's apply the formula:
[tex]Q=mc[/tex]Δ[tex]T[/tex]
[tex]Q = 386g (0.897J/gC)(76.0C)[/tex]
[tex]Q = 26314J[/tex] or [tex]26.314KJ[/tex]
Round according to your teacher's specification (example: significant figures) if needed.
i need help guys, i dont understand what is weak acid and bases.
Answer:
Weak acids and bases are only partially ionized in their solutions, whereas strong acids and bases are completely ionized when dissolved in water.
Explanation:
A plant grows at the same rate as wheat plant 2. If the plant is 4.2 cm tall, calculate how old the plant is. Use the corrected trendline for wheat plant 2.
Answer:
The correct response is "3.127 weeks". A further explanation is given below.
Explanation:
As we know,
y = 1.3431x
Use, y = 4.2 cm
Now,
⇒ [tex]y = 1.3431x[/tex]
On substituting the values of y, we get
⇒ [tex]4.2=1.3431x[/tex]
⇒ [tex]x = \frac{4.2}{1.3431}[/tex]
⇒ [tex]=3.127 \ weeks[/tex]
12. A landslide is an example of
A. river deposition
B. glacial scouring
C.
mass movement
D. chemical weathering
Land slides are slopes of rocks in river side. The landslides are formed by the mass movement, volcanoes, earthquakes etc.
What are landslides?The sliding down of a slope of a mass of rock, rubble, or earth is known as a landslide. Landslides are a sort of "mass wasting," which refers to any downward movement of soil or rock caused by gravity alone. Five different slope movement types are referred to as "landslides": falls, topples, slides, spreads, and flows.
By the type of geologic material, these are further separated (bedrock, debris, or earth). Common landslide types include debris flows, often known as mudflows or mudslides, and rock falls.
Rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance from human activity, or any combination of these causes might start a landslide on a slope that was already about to move.
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15. Name one benefit and two risks of nuclear power (3)
Benefit:
Risk 1:
Risk 2:
Plss anwser all I’m doing a test
Answer:
good: We can reuse the fuel from nuclear energy projects.
bad 1: There is always the threat of an accident when working with nuclear energy
bad 2: Exposure to nuclear materials or uranium can create health problems
Explanation:
Answer:
benefits: lots of energy produced from small amounts of uranium it also does not pollute the air
risks: A nuclear power accident can make an entire region unlivable, have a negative effect on the environment for years to come, kill thousands of people, create a spike of cancer rates within nearby communities, kill off endangered fish populations (depending on their location), destroy local food supplies, etc.
Nuclear energy can also be turned into explosive devices that can be used to create powerful yields Nuclear energy creates harmful waste. Nuclear energy burns cleanly, which is seen as an advantage. It also creates radioactive waste that is toxic to the environment and dangerous to humans. If this waste is not disposed of properly, then the damage it causes may last for hundreds, if not thousands, of years. In the United States, damages that are directly associated with the storage of nuclear waste materials is estimated to be at least $38 billion. Politico reports that the costs could be as high as $65 billion.
Explanation:
What happens in an oxidation half-reaction?
ОА. .
Elements gain electrons.
OB.
Elements lose electrons.
Ос. .
Oxygen is added.
OD. Oxygen is lost.
Answer:
Elements lose electrons.
Explanation:
What process can result when liquid water absorbs heat energy A condensation B evaporation C or D precipitation
Answer:
C.) evaporation
Explanation:
When water absorbs enough heat, it becomes a gas (water vapor). This process is called evaporation.
I hope this helps! :)
2. Which type of glassware is used for general mixing, measuring and
boiling?
A. crucible
B. funnel
C. separatory funnel
D. beaker
Answer:
D
Explanation:
A beaker can be used for boiling coz it can withstand high temperatures.
It can be used for measuring the volume of a solid indirectly by measuring the displacement of a liquid.
It can as well be used for mixing coz it flat bottomed
How many milliliters of 0.550 M hydrochloric acid are needed to react with 10.00 mL of 0.217 M CSOH?
A. 3.95 mL
B. 0.253 mL
C. 0.0395 mL
D. 25.3 mL
Answer:
D
Explanation:
D is the answer lolyeshsjs
How many atoms of aluminum (Al) are in 2.34 mol of aluminum?
Answer: " [tex]1.41 * 10^{24}[/tex] " atoms of aluminum (Al) .
____________________________________
Explanation:
_________________________
Using a technique called "dimensional analysis" ; as follows:
________________________
→ " [tex]\frac{2.34 mol Al}{1} * \frac{6.022*10^{23}atoms Al}{1 mol Al} = ?[/tex]
________________________
The units "mol Al" ["moles of aluminum"] cancel out; and we have:
________________________
→ "[tex][(2.34) * (6.022 * 10^{23})] = ?[/tex] atoms of Al [aluminum].
________________________
Note that by definition: 1 (one) "mole" (abbreviated "mol") of anything consists of " [tex]6.022*10^{23}[/tex] " units " of that particular thing.
This number: 6.022*10^{23} —is known as: "Avogadro's number".
________________________
→ [ 2.34 * 6.022 * 10^23] ;
= 1.409148 * 10^24 ;
→ Round to 3 (Three) significant figures;
→ since: "2.34" has 3 (Three) significant figures;
→ to get: " [tex]1.41 *10^{24}[/tex] atoms of aluminum (Al).
________________________
Hope this is helpful to you! Wishing you the best!
________________________
After a lightning storm, the Rodriguez family notices the TV no longer works.
What probably caused this malfunction?
A. Power from the TV was pulled into the ground by the lightning.
B. A power surge burned an electric component of the TV.
C. The lightning sucked power from the TV.
D. The surge protector sucked power from the TV.
Answer:
B
Explanation:
A P E X
After a lightning storm, the Rodriguez family notices the TV is no longer working because a power surge burned an electric component of the TV. The correct option is B.
What is lightning?Lightning is a natural phenomenon that occurs when there is a collision of negative and positive charged particles. It appears as light or spark of electricity into the earth. It shines and affects the eyes if directly seen.
Lightning occurs when there is thunder or rain, lightning causes destruction to the earth, the houses, trees, and people are also impacted by this. The TV was not working because there was a short circuit due to lightning.
Thus, the correct option is B. A power surge burned an electric component of the TV during a lightning storm.
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Help me with this pls
PLEASE HELP ME I DON'T UNDERSTAND PLEASE HELP THIS IS MY LAST QUESTION I WILL GIVE BRAINLIEST
You have learned about the common characteristics of inner planets and outer planets. Explain how these
characteristics are verified observation and not just the options of scientists.
Answer:
Because they all have different characteristics and they are not just things that the scientists say. they are all different but some of them have the Same charateristics
A rigid cylinder contains a sample of gas at STP. What is the pressure of this
gas after the sample is heated to 500 K in atm?
Answer:
1.5 atm
Explanation:
The relationship between the endoplasmic reticulum and the Golgi complex is most similar to which of these examples? A a factory that creates a product and the shipping department that delivers it to customers B a farmer who grows food and people who cook and eat that food in different ways C a bus that picks up passengers and the passengers who get out at different stops D a power plant that makes electricity and the town that uses it to light their houses
Answer: Answer is A
Explanation:
The endoplasmic reticulum and the Golgi complex together make the endomembrane system. They are like factory and shipping departments. thus, option A is correct.
What are the endoplasmic reticulum and the Golgi?The endoplasmic reticulum (ER) is the membrane-bounded organelle that is a network-like structure that even has ribosomes attached to it (RER). They are the site of lipid and protein synthesis in the eukaryotic cell.
Golgi on the other hand, are organelle present in the cytoplasm that is the site of the packaging, storage, and transportation of the lipids produced by the ER to the other sites or out of the cell.
The endoplasmic reticulum act as a factory that manufactures lipids and proteins, whereas the Golgi act as a shipping department that packs and transports the molecules in vesicles to various sites.
Therefore, option A. ER acts as the factory and Golgi as the shipping department.
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The two major types of bonds are ___________________ and _____________________. Electrons are either ________________ or _______________ to fill the last shells of atoms that ions. The ____________________ number of an ion is either positive or negative. When we combine ions we can only combine _____________________ with ____________________ ions. When atoms share electrons they form ____________________ bonds. The electrons involved with bonding, in the last shell that are shared are called____________________ electrons. Three examples of macromolecules are _______________________, ________________________ and ___________________. The four main atoms involved in carbon chemistry are ____________________________.
Answer:
chemical bonds and covalent bonds
Explanation: covalent bonds are in which the valence electrons density is shared between two atoms and chemical bonds are the connections between atoms in a molecule . electrons can be either free [not attached to any atom] or bound to nucleus of an atom. atom or molecule is a number of an ion which is either positive or negative. when we combine ion we can only combine elements with ionic bonds. when atoms join together , they form chemical bonds without transferring any electrons but they rather share them. copper sulphide are the last shell that are shared with bonding . proteins, carbohydrates, lipids are the example of macromolecules . nucleic acids, lipids, proteins, carbohydrates are the main atoms involved in carbon chemistry.
HOPE THIS ANSWER HELP!!
A certain chip W used in a circuit of a micro computer has a mass of 5.68 milligram ,calculate the amount of W in the micro computer (W=28g/mol)
The amount of W : = 1.22 x 10²⁰
Further explanationGiven
5.6 mg of a micro computer
Required
The amount of chip
Solution
A mole is a number of particles(atoms, molecules, ions) in a substance
1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mass = 5.68 mg = 5.68 x 10⁻³ g
mol :
= mass : MW
= 5.68 x 10⁻³ g : 28 g/mol
= 2.03 x 10⁻⁴
The number of atoms :
= 2.03 x 10⁻⁴ x 6.02.10²³
= 1.22 x 10²⁰
Hydration is a specific kind of _______.
a.) dissociation
b.) dissolution
c.) ionization
d.) solvation
What material would you use to replace synthetic materials and make the hot/cold pack environmentally friendly?
Which element has chemical properties that are most similar to potassium?
Answer: Elements found in group 1 (Alkaline Metals)
Explanation: Any element found in group 1, such as Lithium, Sodium, Caesium, or Francium, have similar properties as potassium. Atoms that are found in the same group on the periodic table have similar chemical properties.
Pls help! Urgent!
The law of conservation of mass states that the mass of the reactants is _____
the mass of the products.
A. Less than
B. Equal to
C. Greater than
Answer:
c
Explanation:
Answer:
b. equal too
Explanation:
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants
Explain how self heating cans work
Answer:
when two substances come together to create heat.
Explanation:
there have to be something to create heat.
Which of the following statements is incorrect:
a.When the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products
b.A combustion reaction is a reaction where diatomic oxygen is a product
c.A combustion reaction can easily be balanced by saving the oxygen’s for last
d.When the combustion of a reactant that contains nitrogen occurs, diatomic nitrogen will be one of the products
Answer:
the answer is c I believe
To solve such this we must know the concept of combustion reaction. Therefore, the correct option is option A that is when the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water and heat in large amount. When the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products is the correct statement.
Therefore, the correct option is option A that is when the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products.
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where does mechanical digestion occur and chemical digestion occur in the body
Answer:
Mouth
Explanation:
Both mechanical and chemical digestion occur in the mouth. Teeth grind and break up food (mechanical), while an enzyme in saliva called amylase begins to break down carbohydrates (chemical). After it is swallowed, the chewed food (now called a bolus) moves down the esophagus.
Hope this helps! :)
Which labels belong in the cells marked X and Y? X: High Y: High X: High Y: Low X: Low Y: High X: Low Y: Low
Answer:
hello your question is incomplete below is the missing part of the question
Keisha makes a table to compare plasmas and solids.
Plasma
Solid
Kinetic energy
X
Density
Y
Which labels belong in the cells marked X and Y? X: High Y: High X: High Y: Low X: Low Y: High X: Low Y: Low
answer : X: High Y:High
Explanation:
The labels that belong in the cells are ; X: High Y:High this because when comparing Plasma and Solids the variables; X and Y have positive correlation hence when X is High, Y will be High as well
Answer:
a
Explanation:
3. Roger ran 50 meters to the left, turned around and ran 100 meters to the right, and then turned around once more and ran 10 meters to the left. Determine his total displacement and distance traveled from the starting point.
Answer:
Distance=160 meters, Displacement = 40 meters right
