The answer is C multiple alleles
Data Given: Molarity = 0.085 M
Ka = 4.5 × 10⁻⁴
To Find: pH = ?
Solution: First find out the concentration of [H⁺] Ions using following formula,
[H⁺] = 
Puting values,
[H⁺] =

[H⁺] =

[H⁺] = <span>0.00618465843
</span>Or,
[H⁺] = 6.18 × 10⁻³Calculate pH as,
pH = -log [H⁺]
pH = -log (6.18 × 10⁻³)
pH = 2.20
It's called a nebula or nebulae (plural). They are not only massive clouds of dust, hydrogen and helium gas, and plasma; they are also often “stellar nurseries” – i.e. the place where stars are born.
Can you please reword that? I don't understand the question. But I can help you though, I am good at science.
The answer is c, carefully read over and highlight key words