Question

With white light, a team measured a 0.7% percent change with 3.5g of plant matter in a one liter container. Convert

Answer 1

moles CO₂ = 5.57.10⁻⁴

Further explanation  

A mole is a number of particles(atoms, molecules, ions)  in a substance

Can be formulated :

$\tt mol=\dfrac{mass}{MW}$

0.7% percent change with 3.5g of plant matter

mass :

$\tt 0.7\%\times 3.5~g=0.0245~g$

moles :

$\tt moles=\dfrac{0.0245}{44}=0.000557=5.57.10^{-4}$