Which reaction will occur?
O 2NaBr + 12 → 2Nal + Br2
O 2Fe + Al2O3 → 2A + Fe203
2AgNO3 + Ní → Ni(NO3)2 + 2Ag
O Pb + Zn(C2H302)2 → Zn + Pb(C2H302)2

Which metal exist in liquid state and can be cut with knife ?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's