Question

1. dopamine (c₈h₁₁no₂) is a neurotransmitter associated with pleasure. how many moles of dopamine are present in 0.750 grams?

Explanation:

Step1: Calculate molar mass of dopamine

Molar mass of \(C = 12.01\space g/mol\), \(H= 1.008\space g/mol\), \(N = 14.01\space g/mol\), \(O = 16.00\space g/mol\)
For \(C_8H_{11}NO_2\):

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Step2: Calculate moles of dopamine

Use the formula \(n=\frac{m}{M}\), where \(m = 0.750\space g\) and \(M = 153.178\space g/mol\)

$$ n=\frac{0.750}{153.178}\approx0.0049\space mol $$

Answer:

\(0.0049\space mol\)