How many moles are present in 10.5 grams off nacl

To convert weight to moles, we must use the molar weight found on the periodic table. Sodium (Na) has a molar weight of 22.99 g/mol. So let's set up an equation and cancel out units:

So now we know that 10.5g of sodium is equal to 0.4567 moles.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.