Copper (0) oside ry hydrogen
n 을
Liquid L.
T T1
pa
Corabustion tube
Ice-cold water
(1) State the observation made in the combustion tube.
(1 mark)
(in) Write down the equation leading to formation of liquid L.
(1 mark)
(iii) What property of hydrogen is being investigated.
(1 mark)
(iv) Why is potassium oxide not used to investigate this property of hydrogen gas. I mark
(v) Hydrogen gas is used in hydrogenation of oils. What do you understand by the term hydrogenation?
(vi) Give any 2 other industrial uses of hydrogen gas.
(2 marks)
9. Fractional distillation of liquid air is mainly used to obtain nitrogen and oxygen.
(i) Name one substance that is used to remove carbon (IV) oxide from the air before it is
changed into liquid
(1 mark) (ii) Describe bow
nitrogen gas is obtained from the liquid air. (Boiling points nitrogen = -196°C, Oxygen = -183°C)​

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?

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction