2 4.1.2 Quiz: Electricity Question 8 of 10
How does a battery generate electrical energy?
A. It controls the current in a circuit by opposing the movement of
electrons in a conducting wire.
O B. It creates a potential difference in electric charge between its
negative terminal and its positive terminal.
C. It creates a potential difference in electric charge between its
negative terminal and a resistor.
D. It controls the current in a circuit by accelerating the movement of
electrons in a conducting wire,
SUBMIT

B. It creates a potential difference in electric charge between its

negative terminal and its positive terminal.

Explanation:

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂

what is the actual question though?