What are the coefficients that would correctly balance this reaction? Ni + C4H8N2O2 → Ni(C4H8N2O2)2

a.1,2,1
b.2,2,1
c.2,1,1
d.2,2,2

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Can someone me with 6 to 10 plz this is for masteries test.

Light waves can move through , but they travel fastest when they move through a(n) .