Which temperature is equal to 120. K? (1) -153°C (3) +293°C (2) -120.°C (4) +393°C
1 answer:
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Answer: pH=12.69
Explanation:
Initial 0.12 0 0
Eqm 0.12-x x x
(neglecting small value of x in comparison to 0.12)
Moles of
0.06 moles of NaOH will give 0.06 moles of
Now moles of
will be neutralized by
moles of
and
moles of
will be left.
Molarity of
pH = 14 - pOH= 14 - 1.31 = 12.69
Answer:
Upper F subscript 2 (g) plus upper C a (s) right arrow with delta above upper C a upper F subscript 2 (s).
Explanation:
This is a chemical reaction problem.
In expressing any chemical reaction, we need to understand that there are reactants and products.
- The reactants are the species on the left hand side that are combining.
- The products are the species on the right hand side that are formed.
- Every chemical reaction is obeys the law of conservation of matter i.e equal number of matter on both sides.
Using the statement of this problem, we can deduce that;
Reactants are Fluorine gas and Calcium metal
Product is Calcium Fluoride
Note: A metal is a solid(s) and powder is a solid(s). A gas is denoted as (g). They depict the state of the species reacting.
F₂ + Ca
→ CaF₂
We can see that equal number of atoms are on both sides of the expression.