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12.Airon Jay is fond of eating cereal drink even if he is already in grade 7. What compounds do Airon Jay has taken? I. Iron pyrophosphate II. Calcium chloride III. Sodium bicarbonate IV. Zinc sulfate

A. I and II only
B. I and III only
C. II and III only
D. I and IV only

13.Danica was assigned by her teacher to match compound with its constituent elements. Which do you think of her matched pair are correct? I. Calcium chloride : calcium, chlorine II. Water : nitrogen, oxygen III. Carbon dioxide; carbon, oxygen IV. Salt : sodium, magnesium

A. I and II only
B. I and III only
C. II and III only
D. I and IV only​

Sagot :

Janandersongabriel49idn

Answer:

1 A

2D

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