What is the total distance traveled? * 40
30
E 20
Distance (m)
10
0
20
40
80
100
60
Time (s)
40m
O 80m
100m

40 (m)

Explanation:

Between the time of O seconds to 20 seconds, the amount of travel was 10 meters. Then, there was a pause of distance from 20 seconds to 40 seconds. After that, between the time of 40 and 60 seconds, there was a distance of 30 meters traveled. Add those distances up and you get 40 meters.

I hope this helps! :)

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

the correct answer would be d. hope this !