(2) H2SO3(aq) and Ca(NO3)2(aq)
(3) H2SO4(aq) and Ca(OH)2(aq)
(4) SO2(g) and CaO(s)
H₂SO₄(aq) and Ca(OH)₂(aq) form the salt CaSO₄(s) in a neutralization reaction. Therefore, option C is correct.
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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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.
mass
neutrons
electrons
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.
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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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.