Drag the lines to the correct boxes to complete the pairs. Use this table to match the molecules with their estimated masses

the answer is

CO2 (1 atom of carbon and 2 atoms of oxygen)7.31x10-^23

3.34x10-^24 H2(2 atoms of hydrogen)

2821x 10-^23 NH3 (1 atom of nitrogen and 3 atoms of hydrogen

7.64x 10-^ 23 NO2 1 atom of nitrogen and 2 atoms of oxygen

Step-by-step explanation:

i got all of them right so these are all correct!!

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."