Chemistry is a big part of your everyday life. You find chemistry in daily life in the foods you eat‚ the air you breathe‚ your soap‚ your emotions and literally every object you can see or touch. Here ’s a look at some everyday chemistry. Elements in the Human Body Steve Allen‚ Getty Images Your body is made up of chemical compounds‚ which are combinations of elements. While you probably know your body is mostly water‚ which is hydrogen and oxygen‚ can you name the other elements that make
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Source A: Lenin was a great leader yet the most humble of men. For his achievements in the October revolution‚ in defending the foreign invaders and destroying the whites‚ in bringing peace and prosperity‚ we are forever in his debt. (A Russian view of Lenin written at the same time of his death in 1924) Was this an accurate assessment of Lenin and his achievements? One man with a gun can control 100 without one." Lenin‚ Vladimir Ilich 1917 Lenin was a man with principles that tried his best
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12U Equilibrium Unit Test Multiple Choice K/U Identify the letter of the choice that best completes the statement or answers the question. ____ 1. When solid lead(II) phosphate is in equilibrium with its ions‚ the ratio of lead(II) ions to phosphate ions is which of the following? a. 1:1 d. 2:3 b. 1:2 e. 3:2 c. 2:1 ____ 2. In a saturated solution of silver phosphate‚ the concentration of silver ion is 4.5 10-4 mol/L. The Ksp of silver phosphate would be which of the following
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Contributions of Ancient Greece Many of the roots of Western society can be traced back to ancient Greece. The longest areas of contribution are architecture‚ medicine‚ and philosophy. The philosophical area of ancient Greece is one of the most important; it foundededucational laws and many other things. Also architecture was a major part of what ancient Greece left behind considering they constructed huge buildings that still stand today. Greece was known as one of the founders of modern medicine
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Experiment 9 : The effect of substrate concentration on enzyme activity Objective To find out the relationship between the substrate concentration and the rate of reaction by determining the number of bubbles produce Hydrogen peroxide (H2O2) is a by-product of biochemical metabolism. An accumulation of hydrogen peroxide can be deadly‚ so it has to be decomposed. One of the decomposing factors is an enzyme called Catalase. Catalase breaks hydrogen peroxide into water and oxygen. The chemical
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Keghan Chapter 8 MULTIPLE CHOICE QUESTIONS Topic: Structure Elucidation 1. An alkene adds hydrogen in the presence of a catalyst to give 3‚4-dimethylhexane. Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product. The structure of the alkene is: CH3 A) CH3CH=C-CHCH2CH3 (cis or trans) CH3 CH3 B) CH3CH2C=CCH3 (cis or trans) CH2CH3 C) CH3 CH2=CCH2CHCH2CH3 CH3 CH2 D) CH3CH2CCHCH2CH3 CH3 CH3 E) CH3CH2CHCHCH=CH2
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in painting. Each medium exerts a pronounced effect on the finished product‚ is capable of varied treatment and determines its own stroke. What is it made of? Oil painting IV: Elements Line- the painting reflects curved line that symbolizes being meek and humble of Jesus and the love Mary has given to his son. Color- the idea of giving Mary a new image is seen on this painting. The painter uses the dark color for the painitng instead of a usual light-colored image of Mary and Jesus. Form-
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
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CHE 242 Tutorial 3: Problems & Answers Week 4: Feb 2- 6‚ 2009 1. Consider a gas that occupies 1.00 dm3 at a pressure of 2.00 bar. If the gas is compressed isothermally at constant external pressure‚ Pext‚ so that the final volume is 0.500 dm3‚ what is the smallest value Pext can have? Calculate the work involved using this value of Pext. Solution For compression to occur‚ the value of Pext must be at least as large as the final pressure of the gas. P1 = 2.00 bar‚ V1 = 1.00 dm3‚ V2 = 0.500
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Functionalism is the perspective that social events are best explained as the contributions they make toward society. Functionalism interprets each part of society and determines its contribution to the society as a whole. Functionalism originated from the works of Emile Durkheim who was mainly interested in the idea of what held society together. Conflict theory is the idea that society tends to reinforce inequality and give power to the dominant groups; it emphasizes division of society. Conflict
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