Question

give me all answers​

Answer 1

Q(1) Pb(NO3)2=Pbo+NO2+O2

(ii) FeSO4-----fe2o3+So2+so3

(iii) Cao+h2o=Ca(oh)2+h2

Q(2) let R1,R2,R3 be three resistors connected in series with a lid V and current passing through each resistor be I

from ohms law

V1=I*R1

V2=I*R2

V3=I*R3

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V1+V2+V3=I(R1+R2+R3)

V=I(R1+R2+R3)

V/I=R1+R2+R3

R=R1+R2+R3 (V/I=R)

Req=R1+R2+R3

Q(3) p.D-when a work is done across two points in a electric circuit in moving a unit charge from.one place to another

(b) power-is defined as rate of moving a  electric charge in t seconds

(c) it is a property by which it opposes the flow of current in a conductor

Q(4) v=20V

I=4.5MA=4.5*10-3A

R=?

R=V/I

R=200/45*10-3

R=4.4*10-3 ohm