Patty wants to see what kind of light bulbs last longer. She sets up two lamps. One lamp has an incandescent light bulb, and the other lamp has a fluorescent light bulb. She turns them on at the same time and leaves them on until they burn out. The results are shown below: Bulb TypeDays to Burn Out

Incandescent83
Fluorescent417

What is the dependent variable in Patty’s experiment?

What is an example of a physical property?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o