Answer:
2H2 + O2 -----> 2H2O
Not sure about the second question though.
Rare earth metals are a group of 17 elements - lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium - that appear in low concentrations in the ground
<h2>answer:</h2>
Various Constituents of Petroleum and their Uses
Constituents of Petroleum
Kerosene
uses➪ Fuel for stoves, in lamps and as aviation fuel for jet aircrafts
Constituents of Petroleum
LPG
uses➪ Fuel for home and industry
Constituents of Petroleum
Lubricating oil
uses➪Used for Lubrication in machines and engines
Constituents of Petroleum
Paraffin wax
uses➪ Ointments, candles, vaseline etc.
Answer:
Robert Hooke
Explanation:
He saw a series of walled boxes that reminded him of the tiny rooms, or cellula, occupied by monks.
