The phase of matter where particles at extremely high temperatures become ionized.
Answers
Answer: Plasma
Explanation:
There are four states of matter
Solid state : It is a state in which the particles are closely packed and does not have any space between them. This state has a definite shape and volume.
Liquid state : It is a state in which the particles are present in random and irregular pattern. The particles are closely arranged but they can move from one place to another. This state has a definite volume but does not have a fixed shape.
Gaseous state : It is a state in which the particles are loosely arranged and have a lot of space between them.This state has indefinite volume as well as shape.
Plasma is the state of matter in which the gas is present in ionized form and is at high temperatures. Thus due to the presence of charged particles, they allow electric current to pass through them and are good conductors of electricity.
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The melting points of canola oil, corn oil, sunflower oil, and peanut oil are 10°C, –11°C, –17°C, and –2°C. If you cool a mixture of these oils to 5°C, which one can you separate easily?
b. energy input
c. equilibrium
d. exchange reaction
Answers
since you need to release a certain amount of energy to hit the activation point.
Answers
Explanation:
Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.
As a result, formula of magnesium oxide is MgO and not .
The student write the equation as , it is not correct.
Therefore, given equation will be balanced as follows.
Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.
Final answer:
No, the equation is not balanced correctly. The correct balanced equation is
Explanation:
A balanced chemical equation is a symbolic representation of a chemical reaction that ensures the conservation of mass and charge. It shows the reactants on the left side and the products on the right side, with coefficients indicating the relative quantities of substances involved to satisfy the law of conservation of matter.
The given chemical equation is not balanced correctly. To balance this equation, we need to ensure that there is an equal number of each element on both the reactant and product sides. In the unbalanced equation, there is one magnesium atom on the reactant side and two oxygen atoms on the product side. To balance it, we need to put a coefficient of 2 in front of MgO, resulting in the balanced equation:
Learn more about Balancing chemical equations here:
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Answers
The mass of water that will be produced if 10.54 g of H₂ react with 95.10 g of O₂ is 94.86 g
Balanced equation
2H₂ + O₂ —> 2H₂O
Molar mass of H₂ = 2 × 1 = 2 g/mol
Mass of H₂ from the balanced equation = 2 × 2 = 4 g
Molar mass of O₂ = 2 × 16 = 32 g/mol
Mass of O₂ from the balanced equation = 1 × 32 = 32 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 ×18 = 36 g
SUMMARY
From the balanced equation above,
4 g of H₂ reacted with 32 g of O₂ to produce 36 g of H₂O
How to determine the limiting reactant
From the balanced equation above,
4 g of H₂ reacted with 32 g of O₂
Therefore,
10.54 g of H₂ will react with = (10.54 × 32) / 4 = 84.32 g of O₂
From the calculation made above, we can see that only 84.32 g out of 95.10 g of O₂ given, is needed to react completely with 10.54 g of H₂.
Therefore, H₂ is the limiting reactant.
How to determine the mass of water produced
From the balanced equation above,
4 g of H₂ reacted to produce 36 g of H₂O
Therefore,
10.54 g of H₂ will react to produce = (10.54 × 36) / 4 = 94.86 g of H₂O
Thus, 94.86 g of H₂O were obtained from the reaction.
Learn more about stoichiometry:
(2) ethanoic acid (4) ethanol
Answers
Answer : (2) Ethanoic acid has the lowest vapor pressure at .
Explanation :
Vapor pressure is the pressure which is exerted by vapor when the vapor form is in equilibrium with the solid or liquid form.
Boiling point is the temperature in which the vapor pressure of liquid is equal to the atmospheric pressure.
Vapor pressure is related with the boiling point :
vapor pressure is inversely proportional to the boiling point. As the boiling point increases, vapor pressure decreases and as the boiling point decreases, vapor pressure increases.
The standard boiling point of given liquids water, propanone, ethanoic acid and ethanol are 100, 56, 118 and respectively.
The image of graph of vapor pressure vs temperature is attached below.
Hence, Ethanoic acid is the substance which has the lowest vapor pressure.
water: has hydrogen bonding, dispersion, and dipole forces for intermolecular attraction
ethanoic acid: a carboxylic acid has one polar end with a negative charge as CH3COOH turns to CH3COO-. Hydrogen bonding is also present in pure solutions.
Propanone: is a ketone and has an electronegative oxygen attached to a carbon, but does not exhibit hydrogen bonding since the O is not attached to a hydrogen.
Ethanol: Like water exhibits hydrogen bonding, not as strong but more dispersion forces.
Next we must understand boiling points
Water: 100˚C
Ethanoic Acid: 118˚C
Propanone: 56˚C
Ethanol: 78˚C
Given this knowledge we can order the liquids in terms of decreasing volatility or decreasing vapor pressure. We now notice that Ethanoic acid, or acetic acid will have the lowest vapor pressure at 75˚C
b. oxidation
c. decomposition
d. none of the above
Answers
Answer:
Option (A)
Explanation:
Radioactivity is defined as a process in which an unstable atomic nucleus decays continuously and after a specific period of time changes into a much more stable element. During this time of decay, the nucleus emits charged particles (energy) which are known as the α, β and γ particles. These are often emitted in the form of electromagnetic energy and are very dangerous to health.
The radioactive elements decay at a certain rate which is commonly known as the half-life. Half-life is basically defined as the time required by a radioactive substance to decay half of its initial composition.
Thus, the correct answer is option (A).
(2) nitrogen (4) fluorine
Answers
Answer: Option (1) is the correct answer.
Explanation:
Carbon atoms are able to combine with its atoms resulting in formation of long chains. This property of carbon is known as catenation. Whereas carbon atom also has the property to combine with other atoms and results in the formation of long chains or rings.
On the other hand, oxygen, nitrogen, and fluorine does not form long chains or rings.
Thus, we can conclude that carbon is the element whose atoms can bond with each other to form long chains or rings.