3 years ago

A compass needle points north when let it move freely. why do scientist think this happened?

Chemistry

1 answer:

bezimeni [28]3 years ago

4 0

Answer:

because of...

Explanation:

The earth's magnetic field.

(i dont know if that is what youre looking for, but that is what i know.... hope it helps!!!)

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If you have 3.50 moles of hydrogen and 5.00 moles of nitrogen to produce ammonia, which element is the reactant in excess? 3H2 +

kicyunya [14]

Answer:

nitrogen

Explanation:

The stoichiometry of the reaction says that $H_{2}$ and $N_{2}$ react 3:1 to form 2 moles of $NH_{3}$ , so, if you have 3,5 moles of H, which is equal to 1,75 moles of $H_{2}$ , and 5 moles of N, which are equal to 2,5 moles of $n_{2}$ . only $\frac{1,75 moles of H2}{3}$ =0.583 moles of $N_{2}$ , will react, leaving <em>1.917 moles of </em> $N_{2}$ <em>unreacted</em>, and forming 0.583*2=1.166 moles of $NH_{3}$