Acu-ni alloy is heated to 1200°c. at this temperature the alloy is 30 wt% liquid and 70wt% solid. chemical analysis of the liquid indicates that it is 20 wt% ni and chemical analysis of the solid indicates that it is 30 wt% ni. what is the overall composition of the alloy? (a) 21 wt% ni (b) 23 wt% ni (c) 25 wt% ni. (d) 27 wt% ni.*

chemistry sucks a**

explanation:

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."