IDK THE ANSWER BUT I THINK I NEED HELP ON THIS ONE TO
Answer:
the answer would be C: point source
Explanation:
because it specified the source of the pollution (manufacturing plant)
The answer is A.<span>Boron and carbon are likely together in one period because they have very close atomic numbers, while gallium and germanium are likely together in another period because they have very close atomic numbers.
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Answer : The mass of reactant remain would be, 0.20 grams.
Solution : Given,
Moles of = 0.40 mol
Moles of = 0.15 mol
Molar mass of = 2 g/mole
First we have to calculate the limiting and excess reagent.
The balanced chemical reaction is,
From the balanced reaction we conclude that
As, 1 mole of react with 2 mole of
So, 0.15 moles of react with moles of
From this we conclude that, is an excess reagent because the given moles are greater than the required moles and is a limiting reagent and it limits the formation of product.
The moles of reactant remain = 0.40 - 0.30 = 0.10 mole
Now we have to calculate the mass of reactant remain.
Therefore, the mass of reactant remain would be, 0.20 grams.