Which of the following correctly explains the role of enzymes in biochemical reactions? A) Enzymes provide energy in the form of
2 answers:
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Answer: Melting point of the naphthalene is 80.
Explanation:
Melting point of a substance is temperature at which given solid changes its state from solid to liquid. It is also referred as freezing point of the substance.
Freezing point of substance is a temperature at which given substance changes its state from liquid to solid.
Here, the solid piece of naphthalene is heated and remains at 80°C until it is completely melted.
Answer: The salt which has the highest pH is
Explanation: Salts are formed by the reaction of acid and base. General equation for the generation of salt is given by:
The given salts are formed from the reaction of acids and bases.
1)
This is a salt formed by the reaction of strong base (KOH) and strong acid . So, this salt is a neutral salt.
2)
This is a salt which is formed by the reaction of weak base and strong acid
. So, this salt is an acidic salt.
3)
This is a salt which is formed by the reaction of weak base and strong acid (HCl). So, this salt is an acidic salt.
4)
This is a salt which is formed by the reaction of strong base (NaOH) and weak acid . So, this salt is a basic salt.
Now, we have to find the salt which has the highest pH value.
Highest pH value means that the salt must be basic in nature and from the given salts, only is basic salt. Hence, this salt has the highest pH value.
Answer:
The mass flow rate at the exit of the 2 meter diameter pipe is 1442 kg/s
Explanation:
If the oil is flowing in the 1m diameter pipe at 0.8 m/s, we can calculate the flow as
The mass flow is
The mass flow rate at the exit of the 2 meter diameter pipe is