**EASY** QUESTION IN PICTURE

Please , quick help! I know this but I can’t think of it when I need it if yk what i mean lol!

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

How many moles are in 1.26*10^24 particles in significant figures

If you used the method of initial rates to obtain the order for no2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 m, 0.100 m, & 0.050 m no2.