Planets move slower when they are furthest from the sun. But when they are closer they move faster because of the gravitational pull of the Sun.
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Copper oxide(solid) + Sulphuric Acid (aqueous)-> Copper Sulphate (aqueous)+ Water(liquid)
In equation form:
CuO +H2SO4 -> CuSO4 + H2O
The colour change you will see is black to blue as Copper oxide is usually found as a black powder. Upon the reaction with sulphuric acid it will change to a cyan blue.
If you heat the made solution of copper sulphate, the water will evaporate and you will be left with white anhydrous copper sulphate crystals.
Answer: C₂H₄+3 O₂= 2 CO₂+ 2 H₂O
Explanation:
B is the answer
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