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vekshin1
3 years ago
15

Entrance Question: What is a physical trait? Explain using complete sentences.

Chemistry
1 answer:
azamat3 years ago
6 0

Answer: A physical trait is a defining aspect or feature of your body or other subject that you can see visually.

Explanation:

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Write a chemical equation for LiOH(aq) showing how it is an acid or a base according to the Arrhenius definition.
goldenfox [79]

Answer:

LiOH(aq) → Li⁺(aq) + OH⁻(aq). 

4 0
2 years ago
NH3 is a weak base (Kb = 1.8 × 10–5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.084 M in
kolbaska11 [484]
Answer is: pH of solution is 5,17.
Kb(NH₃) = 1,8·10⁻⁵.
c(NH₄Cl) = 0,084 M = 0,084 mol/L.
Chemical reaction: NH₄⁺ + H₂O → NH₃ + H₃O⁺.
Ka · Kb = 10⁻¹⁴.
Ka(NH₄⁺) = 10⁻¹⁴ ÷ 1,8·10⁻⁵.
Ka(NH₄⁺) = 5,55·10⁻¹⁰.
[H₃O⁺] = [NH₃]  = x.
Ka(NH₄⁺) = [H₃O⁺] · [NH₃] ÷ [NH₄⁺].
5,55·10⁻¹⁰ = x² ÷ (0,084 M - x).
Solve quadratic equation: x = [H₃O⁺] = 6,8·10⁻⁶ M.
pH = -log[H₃O⁺].
pH = -log(6,8·10⁻⁶ M) = 5,17.
7 0
3 years ago
Do elements in the same group have same principle number?
Leviafan [203]

The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.

4 0
2 years ago
Read 2 more answers
On the weak base/strong acid titration curve, label
aleksklad [387]

Answer:

i think the answer will be b. the point where the ph corresponds to a solution of the conjugate acid (bh+) in water;

Explanation:

7 0
3 years ago
When you have been swimming and you come out of the pool, you may feel cold. Use your understanding of endothermic processes to
Brrunno [24]

Answer:

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.

8 0
3 years ago
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