1 mole of any substance is: 6.022*10²³ atoms or molecules.
9 moles of H₂S=9(6.022*10²³ molecules)=5.4198*10²⁴ molecules.
answer:there are 5.4198*10²⁴ molecules in 9.00 moles of H₂S.
A. Dalton - John Dalton created the very first atomic theory. Dalton viewed atoms as tiny, solid balls. His atomic theory had 4 statements:
1. Atoms are tiny, invisible particles.
2. Atoms of one element are all the same.
3. Atoms of different elements are different.
4. Compounds form by combining atoms.
B. Thomson - Thompson believed atoms were made mostly out of (+) charged material, like dough in a bun. The (-) charged electrons are found inside the (+) dough.
C. Rutherford - Rutherford discovered protons and the nucleus. He showed that atoms have (+) particles in
the center, and are mostly empty space. He called these (+) particles protons. He called the center of atoms the nucleus.
Why does a straw look bent in a glass of water?
Answer:
Refraction
Explanation:
A straw looks bent in a glass of water due to the refraction of light as it crosses the air - water boundary.
Refraction is the bending of light rays as it crosses the boundary of one medium to another. The density differences between the medium will determine how the light ray will bend.
- Water is denser than air.
- The image formed to the eyes will be a refracted or bend ray convergent.