Multiply the volume in liters (4.00L) by the concentration of the solution in molar (0.250M) to calculate the number of moles of soluto that you need, then multiply the number of moles by the molar mass of sodium hydroxide (39.99 g/mol) to calculate the mass.
4.00L x 0.250 M x 39.99g / 1L = 39.99g
Basically you need one mol of NaOH (39.99g) dissolved in 4 liters of solution.
Answer:
Acid salts are the converse of basic salts; they are formed in the neutralization reaction between a strong acid and a weak base. ... For instance, in the reaction of hydrochloric acid (a strong acid) with ammonia (a weak base), water is formed, along with ammonium chloride.
Answer:
Explanation:
Use equation:
1.7 m 59 sec
------- X ----------- = 100.3 m
sec 1
The Seconds on the top and bottom cancel each other out so the unit of measurement left is Meters.
Answer:- 15 nano seconds.
Solution:- It is a unit conversion problem where we are asked to convert to nano seconds, where stands for micro seconds.
We will convert micro seconds to seconds and then seconds to nanon seconds.
The conversion factors required here are:
]
and,
The set up is made as:
= 15 ns
So, the answer is 15 nano seconds.
Answer:
could occur at any temperature.
Explanation:
The spontaneity of a reaction is what determines whether the reaction will occur or not. A spontaneous reaction occurs easily.
The spontaneity of a reaction is predicted by the sign of ∆G.
When ∆G is positive, the reaction is not spontaneous. When ∆G is negative, the reaction is spontaneous.
Note that;
∆G= ∆H - T∆S
Where;
∆H = Change in enthalpy
∆S = Change in entropy
T= temperature
If ∆H is unfavourable and ∆S is favourable, the reaction can proceed at all temperatures because ∆G will always be negative.