Three people bought copper items, and they each relied on different properties of copper. bernie bought a set of dishes that included a copper salad bowl. nicholas went to the hardware store and bought 12-gauge wire. matt bought his mother a copper bracelet. which property most likely attracted each buyer to his item?
a. bernie relied on conductivity, nicholas relied on ductility, and matt relied on malleability.
b. bernie relied on ductility, nicholas relied on malleability, and matt relied on appearance.
c. bernie relied on malleability, nicholas relied on ductility, and matt relied on appearance.
d. bernie relied on malleability, nicholas relied on appearance, and matt relied on conductivity.

The answer is A.

Copper is conductive hence Bernie could use the copper bowl to easily warm his food.

Copper is ductile hence Nicholas can easily bend his copper wire gauge

Copper is malleable hence can be easily shaped into a form hence used to make a bracelet for Matt’s mother.  

  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