Answer:
The answer to your question is Q = 1432 Joules
Explanation:
Data
mass of Al = m = 40.0 g
temperature 1 = T1 = 50°C
temperature 2 = T2 = 90°C
Specific heat = C = 0.895 J/g°C
heat = Q = ?
Process
1.- Write the formula to calculate heat
Q = mC(T2 - T1)
2.- Substitution
Q = 40(0.895)(90 - 50)
3.- Simplification
Q = 40(0.895)(40)
4.- Result
Q = 1432 Joules
The bond angles a and b are 120° respectively. The bond angle c is 111.4° .while the bond angle d is 120°. The bond angles e and f are 120° respectively.
In the carbonate ion, all the bond angles and bond lengths are equal hence three equivalent resonance structures can be drawn for the ion. All the bond angles, ( a and b) in carbonate ion all have bond angle of 120°.
The bond angle marked c in OCCl2 has a bond angle 111.4°, the bond angle marked d in the compound has the bond angle, 120°.
There are three bond angles present in the nitrate (NO3-) ion. Three resonance structures contribute to this bond. Based on these structures, the bond angles e and f in the molecule is 120°.
Learn more: brainly.com/question/20339399
the components of the pure substance will not be able to be separated by physical means
Answer:
Balanced reaction: 
S is oxidized and N is reduced.
is the oxidizing agent and ZnS is the reducing agent.
Explanation:
Reaction: 
Oxidation: 
Balance charge: 
...............(1)
Reduction: 
Balance H and O in acidic medium : 
Balance charge: 
...............(2)
[
Equation-(1)] + [ 
Equation-(2)]:
Oxidation number of S increases from (-2) to (0) for the conversion of ZnS to S. Therefore S is oxidized.
Oxidation number of N decreases from (+5) to (+2) for the conversion of to NO. Therefore N is reduced.
consumes electron from ZnS. Therefore is the oxidizing agent and ZnS is the reducing agent.
Physical reaction is something you can detect using your senses
