Answer:
These two images are pictures of the moon. The first one is the moon is in the third quarter. And the second picture is of the moon in the first quarter.
Explanation:
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<span>Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming of natural gas, in a two-step process. In the first step, nitrogen and hydrogen react to form ammonia:
In the second step, ammonia and oxygen react to form nitric acid and water:</span>
Answer: It shows that light acts like a wave, but also to demonstrate that electrons can act like waves and create interference patterns.
Balancing of the chemical reaction involves keeping the number of atoms of a certain element equal in both sides of the equation. For this item, the balanced chemical equation would be,
N2 + 3H2 --> 2NH3
The numerical coefficients are therefore 1 for N2, 3 for H2, and 2 for NH3. The sum of the numerical coefficients is 6.
<em>Answer: 6</em>