Answer:
I cant do it for you but to help you I can tell you this The charged particles can move only when there is a complete conducting pathway (called a 'circuit' or 'loop') from one terminal of the battery to the other.
Explanation:
Explanation:
Expression for the speed is as follows.
where, = root mean square speed
k = Boltzmann constant
T = temperature
M = molecular mass
As the molecular weight of oxygen is 0.031 kg/mol and R = 8.314 J/mol K. Hence, we will calculate the value of as follows.
=
= 498.5 m/s
Hence, for oxygen atom is 498.5 m/s.
For nitrogen atom, the molecular weight is 0.028 kg/mol. Hence, we will calculate its speed as follows.
=
= 524.5 m/s
Therefore, speed for nitrogen is 524.5 m/s.
Answer : The value of of the reaction is, -369.2 KJ
Explanation :
Formula used :
where,
= internal energy of the reaction = ?
= enthalpy of the reaction = -184.6 KJ/mole = -184600 J/mole
The balanced chemical reaction is,
when the moles of are 2 moles then the reaction will be,
From the given balanced chemical reaction we conclude that,
= change in the moles of the reaction = Moles of product - Moles of reactant = 4 - 4 = 0 mole
R = gas constant = 8.314 J/mole.K
T = temperature =
Now put all the given values in the above formula, we get:
Therefore, the value of of the reaction is, -369.2 KJ
Answer:
part a=A. A physical change, then a chemical change
part b:evidence
without physical change any sorts of chemical change do not take place.
for example: when sugar is heated on spoon the physical change takes place in sugar .sugar starts to form liquid from solid.
Elements are like loners, compounds are like couples, and mixtures are like a group of friends that can also have couples (compounds)