Answer:The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface.
Explanation:
When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises.
You can not see between opaque materials because light cannot pass through them.
Answer:
Moles of Hydrogen produced is 5 moles
Explanation:
The balanced Chemical equation for reaction between zinc and sulfuric acid is :

This equation tells that ; when 1 mole of Zn react with 1 mole of sulfuric acid, it produces 1 mole of zinc sulfate and 1 mole of hydrogen.
Since sulfuric acid is in excess so Zinc is the limiting reagent
(Limiting reagent : Substance which get consumed when the reaction completes, limiting reagent helps in predicting the amount of products formed)
Limiting reagent (Zn) will decide the amount of Hydrogen produced


So,

Hence moles of Hydrogen produced is 5 moles
in order for a scientific theory to become a scientific law it needs to be tested with generations of data to confirm that it is really true.