HELPP WILL GIVE BRAINLIEST AND 50 POINT'S IN ORDER FOR AN OBJECT MOVING AT 10m/s TO HAVE KENITIC ENERGYOF 1800 JOULS THE OBJECT MUST HAVE A MASS IN THE RANGE OF- A.0-10
B.10-20
C.20-30
D.30-40

D. 30-40 kg.

good luck, 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

i believe the answer is true.