(5 Marks) How much energy is needed to convert one mole of gaseous atoms of element (2 Marks) C into 1 mole of dipositive ions? (Total 7 Marks) MOLARITY CALCULATIONS 6. Calculate number of moles of: (a) HCl in 25 cm3 of 0.10 mol dm-3 solution
Premium Sodium hydroxide Enthalpy Hydrochloric acid
ECO204: Solutions to Homework 5 1. True‚ False‚ Uncertain a. False. Methods to eliminating moral hazard include writing efficient contracts between principals and agents‚ bonding and deferred payments. The methods to eliminate adverse selection include sending signals and relying on 3rd parties to verify quality. b. True. When there is asymmetric information‚ it drives out high-quality goods because consumers have a difficult time differentiating between high- and low-quality goods. As a result‚
Premium Risk aversion Supply and demand Economics
Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Secondary Education Higher Tier January 2012 1 2 3 4 5 TOTAL Science B Unit Chemistry C1 CHY1H Chemistry Written Paper Unit Chemistry C1 H Thursday 26 January 2012 You will need no other materials. You may use a calculator. 9.00 am to 9.45 am Time allowed 45 minutes Instructions Use black ink or black ball-point pen. Fill in the boxes
Premium Copper Concrete Carbon dioxide
9.3 – The Acidic Environment: Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: NOTE: In chemistry‚ [x] means “concentration of x” in moles per litre (mol/L). EG: [H3O+] means “concentration of H3O+ ions” in mol/L. BASIC reactions to remember: Acid reactions: acid + base salt + water acid + metal salt + hydrogen gas acid + carbonate carbon dioxide gas + salt + water Formation of hydronium: H+ + H2O H3O+ Reactions of
Premium Acid PH
celebration to mark specialoccasions. The thrill and excitement generated by fireworks‚brightening the night sky and immersing it with vivid displays ofcolour and technicality‚ which makes them a crowd pleaser. Behind all the excitement of fireworks‚ chemistry plays an importantrole in creating the vivid colours we witness lighting up the sky. Theactual chemical reactions that take place in the explosions requirethe use of oxidisers‚ reducing agents and binders. The additions ofvarying metal chlorides
Premium Chemical reaction Fireworks Chemistry
| |Chemistry paper | | | | | | |Class: Ten |Roll No: |Subject: Chemistry | |Student’s
Premium Acid Oxygen Calcium carbonate
Chemistry is the science of dealing with the compounds‚ elements‚ and molecular structure of matter. Essentially‚ chemistry is the science of examining substances and objects to find out what they’re made of and how the react to different conditions. All projects Accelerate Rusting To demonstrate how a chemical reaction from vinegar‚ water‚ and bleach can accelerate the rusting process of steel. Acids And Bases To determine which chemicals are acids and which are bases. Apple Mummy To
Premium Water Chemistry Chemical reaction
by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
Premium Alcohol Carboxylic acid Oxygen
A Comparative Study On The Combustibility Of Ethanol (C2H5OH) And Hydrogen Peroxide (H2O2) Mixtures As Fuel Chemistry January 31‚ 2013 Revised February 15‚ 2013 Abstract In this experiment‚ the proponents used mixtures with varied proportions of ethanol and hydrogen peroxide to know which would make a more efficient‚ clean‚ and stable combination. Compared to conventional fuels‚ ethanol contains 36% oxygen thus resulting in more complete combustion. This greatly lowers
Premium Oxygen Combustion Carbon dioxide
Making Connections: Chemistry Assignment By. Sujay Sukumar 5. a) When analyzing the graph‚ a relationship between the hydrocarbon chain of the alkane and its corresponding boiling point can certainly be noticed. There is a increasing correlation which can be explained using the theory that as each hydrocarbon chain gets bigger‚ there are more atoms and thus more electrons which contributes to higher dispersion forces and therefore a higher boiling point which is clearly seen through the graph.
Premium Hydrocarbon Petroleum Natural gas