If you live in earth's northern hemisphere, on june 20th or 21st you experience summer solstice, which represents the official start of summer. this is the longest day of the year. what causes this change in day length?

The rotation of the planets in our solar system.

Earth's tilt toward the sun is maximized at this time in the Northern Hemisphere

Explanation:

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

is it a purebred? it looks more like a red nose, but it doesn't have the red could it be a staffordshire bull terrior? unsure if that's the right name for it sorry