Calculate the mass (in g) of 2.1 x 1026 atoms of Os.

66326.8 g Os

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

2.1 × 10²⁶ atoms Os

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Os - 190.2 g/mol

Step 3: Convert

= 66326.8 g Os

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

66326.8 g Os ≈ 66000 g Os

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.