what are disadvantages and advantages for seahorses plz helpp i need it for science nd i need it in by 11:59 plz help im struggling and i need my grades upp PL

Seahorses: Disadvantages-Because of the amount of mating and giving birth, it can make the male tired. Another disadvantage is that whilst the male is carrying them he gets aggressive. ... Advantages-They give birth to loads of seahorses so a lot of them will survive.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

they are both synthetic elements

explanation:

d