Chemical property is the property of the substances that describes the ability of the substance to involve in chemical reactions. Physical property is that which does not change the chemical composition of the substances. The following properties of water that it is transparent and tasteless in its pure form and it freezes at a temperature of are physical properties as they simply indicate the change in physical state without any change in chemical composition of water.
The other two properties that water reacts with halogens to form oxygen gas as one of the products and water decomposes to form hydrogen and oxygen are chemical properties as the chemical composition of water changes in the given reaction.
Therefore the correct answer is b. 1 and 4
Answer:
<h2>The answer is 4 m/s²</h2>Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
where
a is the acceleration
f is the force
m is the mass
From the question
f = 20 N
m = 5 kg
We have
We have the final answer as
<h3>4 m/s²</h3>Hope this helps you
Answer : The correct option is (d) a solution of 0.10 M NaOH
Explanation :
<u>(a) a solution of pH 3.0</u>
First we have to calculate the pOH.
Now we have to calculate the concentration.
Thus, the concentration is,
<u>(b) a solution of 0.10 M </u>
As we know that 1 mole of is a weak base. So, in a solution it will not dissociates completely.
So, the concentration will be less than 0.10 M
<u>(c) a solution with a pOH of 12.</u>
We have to calculate the concentration.
Thus, the concentration is,
<u>(d) a solution of 0.10 M NaOH</u>
As we know that is a strong base. So, it dissociates to give
ion and
ion.
So, 0.10 M of in a solution dissociates to give 0.10 M of
ion and 0.10 M of
ion.
Thus, the concentration is, 0.10 M
<u>(e) a solution of
</u>
As we know that 1 mole of in a solution dissociates to give 1 mole of
ion and 1 mole of
ion.
So, of
in a solution dissociates to give
of
ion and
of
ion.
The concentration of ion is
First we have to calculate the pH.
Now we have to calculate the pOH.
Now we have to calculate the concentration.
Thus, the concentration is,
From this we conclude that, a solution of 0.10 M NaOH possess the greatest concentration of hydroxide ions.
Hence, the correct option is (d)