Answer:
1. Hydrogen ions; acidic
2. Alkali; hydroxide ions; alkaline
3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ion
H₂SO₄ --> 2H+ + SO₄²-
3b. Sodium hydroxide --> Sodium ion + Hydroxide ion
NaOH --> Na+ + OH-
Explanation:
1. Sulfuric acid releases hydrogen ions in solution. This makes the solution acidic.
Acids produce hydrogen ions when dissolved in aqueous solutions.
2. Sodium hydroxide is an alkali. It releases hydroxide ions in solution. This makes the solution alkaline.
Alkalis are soluble bases that produce hydroxide ions in solution.
3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ions
H₂SO₄ --> 2H+ + SO₄²-
The equation above is for the ionization of sulfuric acid
b. Sodium hydroxide --> Sodium ion + Hydroxide ion
NaOH --> Na+ + OH-
The equation above is for the ionization of sodium hydroxide
Answer:
a. -538 kJ/mol
Explanation:
Internal energy change (ΔU) for the reaction of combustion in the bomb calorimeter is:
ΔU = q calorimeter + q solution
Where:
q calorimeter is Ccal×ΔT, (Ccal=3,81kJ/°C) and (ΔT is 0,285°C)
q solution is c×m×ΔT (c= 4.184 J/g°C), (m=3000g H₂O), (ΔT is 0,285°C)
Replacing:
ΔU = 1,09kJ + 3,58kJ = 4,67 kJ
This energy is per 0,485g of X, now, per mole of X
= -<em>539kJ/mol ≡ a. -538 kJ/mol</em>
<em>-negative because the energy is produced by rising of temperature-</em>
I hope it helps!
The transition metals is Group 3B(13), there is a smoother decrease in ionization energy because these group contains only the transition metals.
The quantity of strength needed to remove an electron from a selected gaseous atom or ion is called the ionisation electricity Group 3B(13) . not just the atoms that are gases at ambient temperature are protected via it; all the elements at the periodic desk are included.
Ionization energy:
the desired energy to put off an outermost electron from a neutral atom is known as ionization electricity.
In typically, up to down inside the periodic table ionization power is decreases but in group 3A and Group 3B(13) (thirteen) it's miles irregular because the arrival of the transition metals in four length due to this Ga, In and Tl elements indicates better the ionization energies so there's no pattern on this organization.
To learn more about Group 3B(13) refer the link:
brainly.com/question/5489194
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The number of silicon atoms that are in this sample is: B.
<u>Given the following data:</u>
- Mass of silicon = 98.3 grams
<u>Scientific data:</u>
- Avogadro's number =
- Molar mass of silicon = 28.09 g/mol.
To determine the number of silicon atoms that are in this sample:
First of all, we would determine the number of moles contained in 98.3 grams of silicon.
Number of moles = 3.4995 moles
<u>By stoichiometry:</u>
1 mole of silicon = atoms
3.4995 moles of silicon = X atoms
Cross-multiplying, we have:
Read more on atoms here: brainly.com/question/10614569