You have two bottles of water. One bottle is left outside in the sun for two hours. The other is left in an air-conditioned room for the same amount of time. What would you expect to observe after the two hours?The bottle left outside will have lower vapor pressure than the bottle from the room.

The bottle left outside will have the same vapor pressure as the bottle inside the room because they both contain water.

The bottle left outside will have higher vapor pressure than the bottle from the room.

No change to either bottle.

Answers

Answer 1

Answer: You have two bottles of water. One bottle is left outside in the sun for two hours. The other is left in an air-conditioned room for the same amount oftime. After 2 hours, I would expect that the bottle left outside will have higher vapor pressure than the bottle from the room.

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Which reactants form the salt CaSO4(s) in a neutralization reaction?(1) H2S(g) and Ca(ClO4)2(s)
(2) H2SO3(aq) and Ca(NO3)2(aq)
(3) H2SO4(aq) and Ca(OH)2(aq)
(4) SO2(g) and CaO(s)

Answers

H₂SO₄(aq) and Ca(OH)₂(aq) form the salt CaSO₄(s) in a neutralization reaction. Therefore, option C is correct.

What is a neutralization reaction?

A neutralization reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products. H⁺ ions and OH⁻ ions combine to generate water during a neutralization process.

The reaction between sulfuric acid (H₂SO₄) and calcium hydroxide (Ca(OH)₂) is an acid-base neutralization reaction that produces calcium sulfate (CaSO₄) and water (H₂O) as products. The balanced chemical equation for this reaction is:

H₂SO₄(aq) + Ca(OH)₂(aq) → CaSO₄(s) + 2H₂O(l)

In this reaction, sulfuric acid donates two protons to the hydroxide ions from calcium hydroxide, forming water molecules. The remaining ions (Ca²⁺ and SO₄²⁻) combine to form the solid product, calcium sulfate. Hence, option C is correct.

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The answer is (3) H2SO4(aq) and Ca(OH)2(aq). The neutralization reaction will not change the valence of elements. For (4), SO2 reacts with CaO is called synthesis reaction.

How many moles of H2 are needed to react with 1 mole off N2?

Answers

3 H₂ + N₂ = 2 NH₃

3 moles H₂ ------- 1 mole N₂
? moles H₂ -------- 1 mole N₂

H₂ = 1 * 3 / 1

H₂ = 3 / 1

= 3 moles of H₂

hope this helps!

If a sample of iron with a density of 7.80 g/cm3 displaces 75.0 mL of water when placed in a beaker, what is its mass?

Answers

1 mL = 1 cm³

75.0 mL = 75.0 cm³

Density = mass / volume

7.80 = mass / 75.0

mass = 7.80 x 75.0

mass = 585 g

hope this helps!

If a sample of iron with a density of 7.80 g/cm^3 displaces 75.0 mL of water when placed in a beaker, its mass is 585 g.

What can be added to an atom to cause a nonvalence electron in the atom to temporarily become a valence electron?energy
mass
neutrons
electrons

Answers

Answer:energy

Explanation:

Energy can be added to an atom to cause a non-valence electron in the atom to temporarily become a valence electron. The correct option is A.

What are valence electrons?

Valence electrons are those electrons that are present in the outermost shell of the atom. These electrons are free to form bonds with another atoms.

Non-valence electrons are preset in the inner shell of the element. These shell are fulfilled with electrons, and these electrons does need to form bonds with other atoms to fulfill their orbit.

The electrons in the orbit have different energies present. The energy change when the electrons transfer from one shell to another shell. When energy is given to the electron, they move to the higher orbit or shell.

Thus, the correct option is A, energy.

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Explain the term "amphoteric"

Answers

A substance either an ion or a molecule that can act either an acid or a base depending on a medium is called Amphoteric. Some metals like zinc, tin, copper and aluminium which produce either metal oxides or hydroxides are examples of amphoteric. During the Amphoterism, the metal compound acts either an acid or a base depending on their oxidation state.

If the Kelvin temperature of a gas is tripled and the volume if doubled, the new pressure will be ___. A. 3/2 the original pressure B. 1/6 the original pressure C. 5 times the original pressure D. 2/3 the original pressurethe answer isnt b or c

Answers

The answer is 3/2 the original pressure. The concept behind this is the ideal gas law wherein it states that Pressure (P) times volume(V) is equal to number of moles (n) times ideal gas constant (R ) times temperature (T). Since you’re trying to calculate for the pressure you use P=nRT/V. Input 3 to Temperature and 2 to volume. You’ll get a pressure of 3/2 which is 3/2 times the original pressure.

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