→ Search the internet to understand the reaction between (Zno) & (HNO3). a) Describe what happens to the first spoonful of powder when he mixes it with the acid.
b) Describe what would happen if the student kept adding zinc oxide to the nitric acid
after the reaction between the acid and metal oxide was complete.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.