The compound K2SiO3• xH2O is a hydrated crystal. It is analyzed for percent water in a procedure similar to the barium chloride lab. An empty evaporating dish was weighed and found to have a mass of 61.57 g. The hydrated crystal was added and the new mass was 63.71 g. The evaporating dish with the sample was heated to remove all water and, after heating, was found to have a mass of 62.61 g. What is the correct formula for this hydrated crystal? (MW for K2SiO3 = 154 g/mol and the MW for H2O = 18 g/mol)

the answer is 0.42 is that is an option. this question provides no info

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.