Part A >
Select your answer from the options below.
3 A(9) - B(9) + 2 C(1)
3 A(9) - B(l) + 2 C(1)
None of the choices are correct.
3 A(g) +B(1) – 2 C()
3A(9) - B(g) + 2 C(g)
3 A(g) + B(9) - C(1)

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

The correct answer is c

Acovalent bond is formed between the two hydrogen bonds

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.