30. Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert? 31. Give one example of the diffusion of a solid in another solid
32 Explain why, the diffusion of a solid in another solid is a very slow proces
33. Which of the following diffuses fastest and which the slowest ?
Solid, Liquid, Gas
Give reasons for your answer.
34 Explain the following:
When an incense stick is lighted in the comer of a room, its fragrance spreads quickly in the entire room
35. Name the three states of matter. Give one example of each
36. State two characteristic properties each of
(a) a solid
(b) a liquid
(c) a gas
37. Why do gases have neither a fixed shape nor a fixed volume ?
38. How do solids, liquids and gases differ in shape and volume ?
39. Arrange the following substances in increasing order of force of attraction between their particles (keeping
the substance having the minimum force of attraction first):
Water, Sugar, Oxygen?
please answer it fast

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. one potential application of nanotechnology is the construction of artificial cells. the simplest cells would probably mimic red blood cells, the body's oxygen transporters. for example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a person's bloodstream. if the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. suppose that the nanocontainers were cubic and had an edge length of 24 nanometers. part a part complete what is the volume of one nanocontainer? (ignore the thickness of the nanocontainer's wall.) express your answer using two significant figures. v v = 1.4ă—10â’20 l previous answers correct significant figures feedback: your answer 1.3824â‹…10â’20 = 1.382ă—10â’20 l was either rounded differently or used a different number of significant figures than required for this part. if you need this result for any later calculation in this item, keep all the digits and round as the final step before submitting your answer. part b suppose that each nanocontainer could contain pure oxygen pressurized to a density of 81 g/l . how many grams of oxygen could be contained by each nanocontainer?

How does concentration affect reaction rate

How is the shape of the poem “peer” connected to its meaning?