The picture below shows a train as it approaches a hill. This train can only make it over the hillif it approaches at its top speed because it will
lose speed as it climbs. What changes are taking place in the train's potential and
kinetic energy as it climbs the hill?

2b2t

explanation:

2b2t

the ratio of the conjugate base to the acid required to attain the desired ph.

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o