Pl help... What causes specific lines to appear in a line spectrum?

Spectral lines are produced by transitions of electrons within atoms or ions. As the electrons move closer to or farther from the nucleus of an atom (or of an ion), energy in the form of light (or other radiation) is emitted or absorbed.…

Explanation:

66 grams of Carbon Dioxide.

Explanation:

The common currency of chemistry is moles. So it is necessary to change the mass of propane to moles. Then write a balance equation so the moles of propane to moles of Carbon Dioxide. Finally moles of Carbon Dioxide must be changed to grams.

C 3 H 8 + 5 O 2 = =3 C O 2 + 4 H 2 O

This is the balance equation for the burning of propane in Oxygen.

From the equation it can be seen that 1 mole of propane makes 3 moles of Carbon Dioxide a ratio of 1:3

Convert 22 grams of propane to moles by dividing by the molar mass of propane.

3 x 12 = 36 grams

1 x 8 = + 8 grams

total = 44 grams/ mole.

22

44

= .5 moles of propane.

Using the ratio of 1:3 .5 = 3( .5) = 1.5 moles of Carbon Dioxide.

Now multiply 1.5 moles of Carbon Dioxide by the molar mass of Carbon Dioxide

1 x 12 = 12 grams

2 x 16 = +32 grams

total = 44 grams /mole.

1.5 moles x 44 grams/mole = 66 grams.

hope that helps :)