Answer:
When iron turns to rust, the chemical identity of the iron changes. When you break ice, the ice is still ice
Answer: Sulfur
Explanation: Sulfur has 16 protons, silicon has 14 protons, and gold has 79 protons.
Answer:
1.20 × 10²⁴ atoms He
General Formulas and Concepts:
<u>Chemistry - Atomic Structure</u>
- Reading a Periodic Table
- Using Dimensional Analysis
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Explanation:
<u>Step 1: Define</u>
8.00 g He
<u>Step 2: Identify Conversions</u>
Avogadro's Number
Molar Mass of He - 4.00 g/mol
<u>Step 3: Convert</u>
<u />
= 1.2044 × 10²⁴ atoms He
<u>Step 4: Check</u>
<em>We are given 3 sig figs. Follow sig fig rules and round.</em>
1.2044 × 10²⁴ atoms He ≈ 1.20 × 10²⁴ atoms He
Answer: A wood
I hope this helps you