Answer:
Thermospheric temperatures increase with altitude due to absorption of highly energetic solar radiation. ... Radiation causes the atmosphere particles in this layer to become electrically charged particles, enabling radio waves to be refracted and thus be received beyond the horizon.
Explanation:
Answer: the color of light shining on the photocell.
Explanation:
1) In an experiment there are two kind of variables: independent variables and dependent variables.
2) The independent variable is the one that can be changed or manipulated. This is done because you want to learn how the changes in this variable may explain or are related to other variable (the dependent variable).
In the description of the experiment, the color of the light is being changed, by placing different color of cellophanes ove the same flashlight.
This is how, keeping the control over other possible variables (the flashlight kind and its distance from the photocell, for example) the experimenter manages to change one only variable: the color of light.
3) On the other hand, the dependent variable, is the variable that is being explained. You do not manipulate the dependent variable directly but you want to learn to what extent this dependent variable is determined by, explained by, predicted by, or simply related to, the independent variable.
In conclusion, the independent variable is the color of light.
The balanced equation for the reaction is as follows
2Al + 3H₂SO₄ --> Al₂(SO₄)₃ + 3H₂
stoichiometry of Al to H₂SO₄ is 2:3
number of Al moles reacted - 15.0 mol
if 2 mol of Al react with 3 mol of H₂SO₄
then 15.0 mol of Al reacts with - 3/2 x 15.0 mol = 22.5 mol
22.5 mol of H₂SO₄ is required
