Chem (: how many grams do 1.3 x 10^21 atoms of sodium weigh?

look at yo periodic table to find the atomic mass

it says that there is 22.98g of sodium (Na) in 1 mol of sodium

1 mol is 6.022 * 10^23 atoms

one way we can do this is ratio and proportion

we are solving for

multiply both sides by

let's say =22.98g and and

therefor

so it weighs about

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

14.29%

step-by-step explanation: