Aarti is designing an experiment for her science class. She
has four 50-milliliter (ml) containers of water at four different
temperatures:
7°C
34°C
58° C
62 °C
She adds 15 grams of salt into each container. At which
temperature will the salt dissolve the fastest?
а 7 с
b 34°C
C 58°C
d 62 C

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.

gas

explanation:

smoke is the matter of a gas

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.