Question

What is the mass in grams of 1.00 x 10 24 atoms of Mn?

a)91.3 g
b) 123.4 g
c) 1.66 g
d) 166 g

Answer 1

A.
Sana po makatulong sagot ko hehe

Answer 2

91.2 g Mn

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Chemistry

Atomic Structure

• Reading a Periodic Table
• Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

[Given] 1.00 × 10²⁴ atoms Mn

Step 2: Identify Conversions

Avogadro's Numer

[PT] Molar Mass of Mn - 54.94 g/mol

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 1.00 \cdot 10^(24) \ atoms \ Mn((1 \ mol \ Mn)/(6.022 \cdot 10^(23) \ atoms \ Mn))((54.94 \ g \ Mn)/(1 \ mol \ Mn))`
2. [DA] Multiply/Divide [Cancel out units]:
   `\displaystyle 91.2321 \ g \ Mn`

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

91.2321 g Mn ≈ 91.2 g Mn