An ionic compound (a) has a net positive charge (b) has a net negative charge (c

Question

An ionic compound (a) has a net positive charge (b) has a net negative charge (c) contains only cations (d) contains only anions (e) has a net charge of zero Which of the following polyatomic ions has a positive charge? (a) hydroxide (b) sulfate (c) hydrogen carbonate (d) ammonium (e) nitrate What is the symbol for the ion 9 protons and 10 electrons? (a) F+ (b) F- (c) Ne (d) Na^+ (e) Ne- wherever applicable, show your calculations using equalities and conversion factors. Report the answers in correct number of significant figures and with correct units. The density of octane, a component of gasoline, is 0.702 g/mL. What is the mass, in kg of 999 mL of octane? (Given: 1 kg = 1000 g)

Explanation / Answer

Question 23.

ionic compounds must contain both, cations + anions

the net charge is ALWAYS 0

Question 24.

polyatomic ions can be positively charged

a) OH = -1

b) SO4 = -2

c) HCO3 = -1

d) NH4= +1 ; choose this option

e) NO3 = -1

Question 25.

n = 9 protons, then this is Fluorine

e = 10 electrons, it has gaine 1

so

F + e- ---> F-

choose B

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