Emily's house lies on the San Andreas Fault, and she wants to protect herself against earthquakes. What is one step she can take? A. Educate herself on ground deformation that occurs before earthquakes. B. Check her building’s foundation to ensure it is resistant to shaking caused by moving tectonic plates. C. Buy a device that can predict earthquakes before they occur. D. Be prepared to evacuate if steam or ash cloud eruptions are visible.

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.

the answer is either b or c

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: