How many electrons are in the most common phosphide ion? (Record your two-digit answer) Answer: 12

What is the percent of N in N2H4?

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a. Rubidum chloride, RbCl, and sulfuric acid, H₂SO4 Rule 4: an exception to the rule for sulfates; RbCl(aq) + H₂SO4 (aq) → Rb₂SO4(s) + HCl(aq) Rule 4: an exception to the rule for sulfates; 2RbCl(aq) + H₂SO4 (aq) → Rb₂SO4 (8) + 2HCl(aq) Rule 4: an exception to the rule for sulfates; 2RbCl(aq) + H₂SO4 (aq) → Rb2SO4 (aq) + 2HCl(aq) O No precipitate: both Rb₂SO4 and HCI are soluble RbCl(aq) + H₂SO4 (aq) → no precipitate b. Potassium carbonate, K₂CO3, and barium chloride, BaCl₂ O Rule 6: Most carbonate salts are only slightly soluble; K₂CO3(aq) + BaCl₂ (aq) → BaCO3(s) + 2KCl(aq) O Rule 6: exeption to rule for carbonates; 2K₂CO3(aq) + BaCl₂ (aq) → BaCO3(s) + 2KCl(aq) O Rule 6: Most carbonate salts are only slightly soluble; K₂CO3(aq) + BaCl₂ (aq) → BaCO3(aq) + 2KCl(aq) O Rule 6: Most carbonate salts are only slightly soluble; K₂CO3(aq) + BaCl2 (aq) → BaCO3 (8) + KCl(aq) c. Sodium sulfate, Na2SO4, and barium nitrate, Ba(NO3)2 O Rule 4: an exception to the rule for sulfates; Na₂SO4 (aq) +…