Answer:
Area of the shaded region = 329.7cm
Explanation:
Area of circle = π r2
Area of smaller circle with radius of 4 cm = 3.14 * 4 * 4 = 50.24cm
Area of bigger circle with radius of 11 cm = 3.14 * 11 * 11 = 379.94cm
To calculate the area of shaded region,
Area of the shaded region = bigger region - smaller region
39.7 - 50.24 = 329.7cm
Area of the shaded region =
Answer:
With an understanding of the ideal gas laws, it is now possible to apply these principles to chemical stoichiometry problems. For example, zinc metal and hydrochloric acid (hydrogen chloride dissolved in water) react to form zinc (II) chloride and hydrogen gas according to the equation shown below:
2 HCl (aq) + Zn (s) → ZnCl2 (aq) + H2 (g)
Explanation: