Planes x and y and points c, d, e, and f are shown.

vertical plane x intersects horizontal plane y. point d is on the left half of plane y. point f is on the bottom half of plane x. point e is on the right half of plane y. point c is above and to the right of the planes.

which statement is true about the points and planes?

the line that can be drawn through points c and d is contained in plane y.
the line that can be drawn through points d and e is contained in plane y.
the only point that can lie in plane x is point f.
the only points that can lie in plane y are points d and e.

The line drawn through points D and E.

Explanation:

Y is a horizontal line and D and E are both on the same line. If a line were drawn it would be within the Y plane.

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