B, millimeters because paper is really thin therefore it'd require small measurements for units.
You have to use the equation F=ma and solve for m to get m=F/a.
m=mass in kg
F=force (in this case 350N)
a=acceleration (in this case 10m/s²)
when you plug everything in you should find that m=35kg
I hope this helps.
2:7 ratio of ethane to O2 = 15:x 9solve for x)
x=52.5 mol O2
There are 2 significant figures. All numbers in a whole number are significant.
