Which substance can not be decomposed by a chemical change?

a. ammonia

b. copper

c. propanol

d. water

(p. s, tysm )

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

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