explain the laws of chemical composition
Answers
Explanation:
After completing my MBBS two years ago, I was brimming with enthusiasm and excitement of finally achieving my dream. I knew I had made my folks proud. My father, someone whom I look up and secretly admire, wanted that I use my acquired skills to serve rural India. I knew I had to deliver and live up to his expectations. So I decided to apply for the Haryana Civil Medical Service in the hope of making it through the coveted service. The results were announced and I was glad to see my name on the merit list. Alas I was given an urban posting. So what if it isn't a rural area, I must give in my best and make my contribution to bring about a change in society, I told myself.
And thus began my journey as a Medical Officer and my first posting was at a civil dispensary in Panchkula district. Being located in a posh locality, my patients were mostly elderly, aged couples who came from affluent backgrounds. They were polite, understanding and sophisticated. I knew I had to be caring and tolerant. Listening to their troubles without getting irritated was hard, but I knew I had to bear with them. Every day I dealt with hundreds of such cases, common diseases like improper bowel evacuation, blood pressure and regular check-ups. I saw the same faces very often. Initially, it left me bamboozled and perplexed. They would come and indulge in small talk about random ramblings in their domestic lives, political affairs, the changing weather and other such stuff.
I realised my job was not confined to their medical woes alone. They found a friend in me. I knew I had to oblige. And thus began my series of rendezvous with retired Army Colonels, their classy better-halves, retired professors, former bureaucrats and others. It was our little 'sunset club’ — 60 plus but full of life, love and energy! I would offer them hot tea and knew another round of silly jokes and anecdotes was on the round, followed by a loud, roaring laughter. I knew my therapy was doing wonders! I saw happier, glowing faces in the coming months.
I realised all our senior citizens need is a little extra love and care. Hear them out, the words of wisdom and experiences they have to offer will last you a lifetime. They do not ask for anything in return. In fact, they bestow you with their choicest blessings. What more could you ask for?
There are days when I'm on leave. My ‘friends’ come to the dispensary, find my mentors, seniors and co-workers sitting and ask them, “Doctor Sahib nahi aaye aaj?” . When she replies in the negative, they return with despair. That’s when I realise the impact, albeit tiny, that I have created. I can sleep with a smile on my face only to wake up next morning, get ready and leave for work to meet my patients, errr, friends. And that's precisely what job satisfaction and happiness is all about.
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Answer:
In simple terms, this law states that matter can neither be created nor destroyed. In other words, the total mass, that is, the sum of the mass of reacting mixture and the products formed remains constant.
Explanation:
1. Law of Conservation of Mass
In simple terms, this law states that matter can neither be created nor destroyed. In other words, the total mass, that is, the sum of the mass of reacting mixture and the products formed remains constant. Antoine Lavoisier gave this law in the year 1789 based on the data he obtained after carefully studying numerous combustion reactions.
2. Law of Definite Proportions
Joseph Proust, a French chemist stated that the proportion of elements by weight in a given compound will always remain exactly the same. In simple terms, we can say that irrespective of its source, origin or its quantity, the per cent composition of elements by weight in a given compound will always remain the same.
3. Law of Multiple Proportions
This law states that if two elements combine to form more than one compound, the masses of these elements in the reaction are in the ratio of small whole numbers. This law was given by Dalton in the year 1803.
4. Gay Lussac’s Law of Gaseous Volumes
In 1808, Gay Lussac gave this law based on his observations. This law states that when gases are produced or combine in a chemical reaction, they do so in a simple ratio by volume given that all the gases are at the same temperature and pressure. This law can be considered as another form of the law of definite proportions. The only difference between these two laws of chemical combination is that Gay Lussac’s Law is stated with respect to volume while the law of definite proportions is stated with respect to mass.
5. Avogadro’s Law
Avogadro proposed this law in the year 1811. It stated that under the same conditions of temperature and pressure, an equal volume of all the gases contains an equal number of molecules. This implies that 2 litres of hydrogen will have the same number of molecules as 2 litres of oxygen given that both the gases are at the same temperature and pressure.
The laws of chemical combination discussed above form the base for quantitative study of chemical reactions. Join BYJU’S to learn more about the laws of chemical combination in the most simplified ways.