In a microwave oven, microwaves emitted by a small antenna are directed into the cooking compartment, and as they enter, they pass a set of turning metal fan blades.
it used to convey information from one place to another through intervening media,like- Radios and televisions
used in hospitals to produce photograph of bone to check for break or fracture.They can penetrate less dense matter such body tissue and skin.
Answer:
pH = 4
Explanation:
pH is a base 10 logarithmic scale
1000 = 10^3
7 -3 = pH = 4
Answer:
(a)
(b)
Explanation:
Hello.
(a) in this case, since the change in the molar enthalpy for this reaction is ΔH= -2891 kJ per mole of methane, we can compute the total change in the enthalpy by considering the given mass of methane which should be converted to moles as shown below:
(b) For this one, we first compute the moles of methane by using the ideal gas equation:
Then, we compute the change in the enthalpy as done on (a):
Regards.
Answer : The volume of 0.10 M NaOH prepared can be 750 mL.
Explanation :
Formula used :
where,
are the initial molarity and volume of NaOH.
are the final molarity and volume of NaOH.
We are given:
Putting values in above equation, we get:
Hence, the volume of 0.10 M NaOH prepared can be 750 mL.
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