Which of the following equations is balanced correctly?
a.
3 h2o → h2 + 3 o2

b.
2 c3h3 + o2 → 2 co2 + h2o

c.
2 c2h2 + 5 o2 → 4 co2 + 2 h2o

d.
cl2 + 2 kbr → kcl + br2

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

answer: they produce more slow than unicellular organisms.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.