En 1000g de oro 18 kilates amarillo hay 750gde oro 15g de plata y 125gde cobre

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat