Imagine that you were the director of a program that maps the ocean floor and finds deep-sea wildlife. One of your submarine’s engines broke while mapping the Mariana Trench. The submarine can make oxygen indefinitely however it needs to get rid of the excess carbon dioxide or it will poison the whole crew. The submarine uses calcium hydroxide to clean carbon dioxide from the air by producing calcium carbonate and dihydrogen monoxide. There is only 2.25 kg of calcium hydroxide left in the submarine. How many grams of carbon dioxide can be cleaned with the amount of calcium hydroxide on the submarine?

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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.  

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.