Can someone please help me please?

What is the mass of 0.46 mil of mgcl2

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

27 drag each label to the correct location on the image. a particular exosolar system has five planets in total: a, b, c, d, and e. the table lists the orbital periods of these planets in days. planet orbital period (days) a 600 b 80 c 1,000 d 500 e 100 move each planet to its orbit in the system.