Answer
A. Its volume is decreased
Explanation
If we compress a gas (decrease) without changing its temperature, the average kinetic energy of the gas particles remains the same.
At a constant temperature, the kinetic energy of particles remains the same. If the volume is reduced at a constant temperature, then the number of particles in unit volume or area increases. If there is an increased number of particles in the unit area then it increases the frequency of collisions per unit area.
At constant temperature, the smaller the volume of the container, the larger the pressure.
Answer:
O2 is the limiting reactant.
Explanation:
Step 1: Data given
Mass of NH3 = 2.00 grams
Mass of O2 = 2.50 grams
Molar mass NH3 = 17.03 g/mol
Molar mass O2 = 32 g/mol
Step 2: The balanced equation
4NH3(g) + 5O2 (g) → 4NO(g) + 6H2O (g)
Step 3: calculate moles NH3
Moles NH3 = mass NH3 / molar mass NH3
Moles NH3 = 2.00 grams / 17.03 g/mol
Moles NH3 = 0.117 moles
Step 4: Calculate moles O2
Moles O2 = mass / molar mass O2
Moles O2 = 2.50 grams / 32 g/mol
Moles O2 = 0.0781 moles
Step 5: Calculate the limiting reactant
For 4 moles NH3 we need 5 moles O2 to produce 4 moles NO and 6 moles H2O
O2 is the limiting reactant. It will completely be consumed. (0.0781 moles). NH3 is in excess. There will react 4/5 * 0.0781 moles = 0.0625 moles
There will remain 0.117 - 0.0625 = 0.0545 moles NH3
O2 is the limiting reactant.
No mathematics the most common way of solving an equation will be PEMDAS so the answer for your question will most likely be subtraction.
Atomic radius atomic number ionization energy and then electronegativity
14. a. Acidic
15. b. Weaker
16. d. Dilute and weak
Explanation:
14. Which type of the solution is one with the pH of 3?
Solution with pH from 1 to 7 are acidic, equal to 7 is neutral and from 7 to 14 basic. The solution with the pH equal to 3 is <u>acidic</u>.
15. The smaller the value of the base dissociation constant (Kb), the <u>weaker</u> the base.
The dissociation reaction of a base (B) is:
B + H₂O → BH⁺ + OH⁻
Kb is defined as:
Kb = ( [BH⁺] × [OH⁻] ) / ( [B] × [H₂O] )
The potency of the base depends on the concentration of the hydroxide ion [OH⁻], so if the Kb ratio is small it means that the concentration of hydroxide ion is smaller so the base will be <u>weaker</u>.
16. A 0.39 M solution of an acid that ionizes only slightly in solution would be termed <u>dilute and weak</u>.
The acid is weak because is only slightly ionizing in solution. The therm diluted is a little bit arbitrarily because we ask yourself "diluted in respect with what"? I would characterize the acid to be diluted at a concentration of 1 M and concentrated at a concentration of 10 M.
Learn more about:
pH
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