Which of the following reactions is a DECOMPOSITION reaction? *
2 points
O
NaOH + KCI – KOH + NaCl
2CaO2Ca + O2
O
Br2 + 2K1 — 12 + 2KBr
2H2 + O2 + 2H20
O
C2H6 + 02 → CO2 + H20
Albiob fthe followinaronotionc i
SYNTUCSIS robotion

Explanation:

Atoms don't disappear in chemical reactions, nor do they appear. ... Let's look at one of your examples: C2H6 + O2 = CO2 + H2O Assume that ... the equation: C2H6 + O2 = CO2 + H20 2*C, 6*H, 2*O 1*C, 3*O, 2*H This can't be ... 2 C2H6 + O2 = 4 CO2 + 6 H20 4*C, 12*H, 2*O 4*C, 14*O, 12*H Now we can

- 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

where are the choice options?