Calculate the number of grams of sodium in 8.4g of NaC7H5O2 (sodium benzoate) express your answer using two significant figures. PLEASE HELP!

1.3g of Na

Explanation:

We'll begin by calculating the molar mass of sodium benzoate, NaC7H5O2. This is shown below:

Molar Mass of NaC7H5O2 = 23 + (12x7) + (5x1) + (17x2)

= 23 + 84 + 5 + 32

= 144g/mol

Now, we can obtain the mass of sodium, Na present in 8.4g of sodium benzoate, NaC7H5O2 as follow:

There are 23g of Na in 144g of NaC7H5O2.

Therefore, the mass of Na in 8.4g of NaC7H5O2 is given by:

23/144 x 8.4 = 1.3g.

Therefore, 1.3g of Na is present in 8.4g of sodium benzoate, NaC7H5O2.

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.  

plasma - state of matter made up of electrically charged particles