Calculate the number of molecules in 3.7 x 10-2 Liters of oxygen gas at STP. Round your answer to the nearest whole number.

9.9 × 10²⁰ molecules O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

3.7 × 10⁻² L O₂ at STP

Step 2: Identify Conversions

[STP] 22.4 L/mol

Avogadro's Number

Step 3: Convert

Step 4: Check

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

9.94705 × 10²⁰ molecules O₂ ≈ 9.9 × 10²⁰ molecules O₂

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.