Two identical appliances are connected to the same household circuit and the circuit breaker trips. Which of the following is true (there may be more than one correct answer) (2 points): (A) If the breaker is reset and only one appliance is connected, the breaker will not trip. (B) Connecting only one appliance on this circuit might not trip the breaker again. (C) Each appliance had too low a resistance to work with a normal 120-V circuit breaker. (D) The appliances together had a total resistance that was too low to work with a normal 120-V circuit breaker.

Explanation:

Circuit breaker trips due to excess current . Appliances are connected in parallel in which resistance becomes less . If only one appliance is connected then the current becomes low because of high resistance due to only one appliance . So breaker may not trip or may trip because resistance of  even single appliance may be quite low so current may still be high.

So B ) is  correct .

So C ) is also correct.

So D ) is also correct.

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz