How many moles of copper are in a 0.53 gram sample?

8.3 × 10⁻³ mol Cu

Explanation:

Step 1: Define

Molar Mass of Cu - 63.55 g/mol

Given 0.53 g Cu

Step 2: Use Dimensional Analysis

= 0.00834 mol Cu

Step 3: Convert

0.00834 mol Cu = 8.34 × 10⁻³ mol Cu

Step 4: Simplify

We are given 2 sig figs.

8.34 × 10⁻³ mol Cu ≈ 8.3 × 10⁻³ mol Cu

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

gas

explanation:

smoke is the matter of a gas