Which elements form alloys:

a) alkali metals
b) transition metals
c) alkaline earth
d) halogen metals

coordination number of pt in [ptcl(no2)(nh3)4]so4 is:

a) 2
b) 4
c) 1
d) 6

the presence of cro4 ions can be detected by:

a) lead nitrate
b) barium chloride
c) sulphuric acid
d) all of the above

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

The energy that powers a hurricane is derived from