Why BF3 acts as a Lewis acid???

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

How do scientists think that gravity affected the formation of our solar system?

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)