Explanation:
Spectator ions refers to elements/molecules that do not form part of the reaction. Basically, these elements/molecules are in the same state in the reactant and product side. From the given reaction, Ca and SO4 change their state from aqueous to solid and Na and Cl do not change their state. Therefore, Na and Cl are spectator ions and Ca and SO4 are not spectator ions.
Answer:
The correct option is C.
19) it's not balanced because when adding h2 and o2 u get h2o2 not h2o
20) I'm not sure
Answer:
A.
Single-celled organisms are simple, while multicellular organisms are complex.
Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound.
I hope it helps
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Number 1: A
Number 2: C
Number 3: D
Number 4: B
Number 5: A
Number 6: C
Number 7: B
Number 8: C
Number 9: B (I think)
Number 10: A or B
Number 11: A
Number 12: A
Number 13: D
Number 14: D (I think)
