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Showing posts from October, 2022

Application of Gay-Lussac’s Law of Combining Volumes

Gay Lussac’s of combining volumes states that gases react in simple ratio with one another and to volumes of the products provided that temperature and pressure remain constant. In this article, you will understand how to apply this law in calculation by studying the following examples below: 1.     2H 2 + O 2 → H 2 O In the reaction above, what volume of hydrogen would be left over when 300cm 3 of oxygen and hydrogen are exploded in a sealed tube?   1cm 3 of oxygen = 2cm 3 of hydrogen 300cm 3 of oxygen = 2 x 300 = 600cm 3 Volume of left over = 1000 – 600 = 400cm 3 2.     Calculate the volume of carbon (II) oxide required to react with 40cm 3 of oxygen. 2CO + O 2 → 2CO 2 1cm 3 of oxygen = 2cm 3 of CO 40cm 3 of oxygen = 2 x 40 = 80cm 3 3.     Calculate the volume of residual gases that would be produced when 100cm 3 of sulphur (IV) oxide reacts with 20cm 3 of oxygen    2SO 2 + O 2 → 2SO 3 1cm 3 of O 2 = 2cm 3 20cm 3 of O 2 = 2 x 20 = 40cm 3

Avogadro’s number and the mole concept

     Matter has different types of particles, such as atoms, ions, molecules, etc. An element is made up of atoms. A mole is used to represent the number of atoms in an element just as a crate is used to represent 30 eggs. Avogadro’s number is the number of units in a mole of any substance and it is equal to 6.02 x 10 23 . Therefore, one mole of any substance is represented by 6.02x10 23 . A diatomic element like chlorine is 6.02x10 23 molecules of chlorine. One mole of tetraoxosulphate (VI) oxide and one mole of methane each represents 6.02x10 23 molecules of these compounds. Similarly, sodium and calcium elements each also contain 6.02x10 23 atoms. Example Question 1   How many atoms are there in 10g of sodium? (Na = 23, Avogadro’s number = 6.02x10 23 ) Since one mole is equal to 6.02x10 23 and one mole is equal to relative atomic mass expressed in grams.     1mole = 6.02x10 23     1mole = 23g 23g    = 6.02x10 23 10g = 6.02x10 23 /23 x 10/1 = 2.62x10 23 Exampl

How to change mobile browser to Desktop site

         Most mobile phones are optimized to make it possible to access mobile-friendly browsers. These mobile-friendly browsers do not display some features of the sites which you are viewing especially if the site is an old version. But, you can still access or view the desktop site when your laptop is not available.    This is very easy and it can be done in two ways By enabling desktop site for all sites Enabling a desktop site for a specific site By enabling desktop site for all site To make desktop site view default for all sites follow these steps: Step 1: Open the google chrome browser on your phone                Step 2: Click on the three vertical dots button at the top right corner                       Step 3: scroll down and click settings           Step 4: scroll down and click site settings                                                      Step 5: scroll down to the bottom of the menu options and click on the desktop site                                          

How to promote your Youtube channel using Thumbnails

    Thumbnail is a still image which appears as a picture which people see first before clicking on your youtube video. Thumbnails are made to represent the content of the video your youtube viewers are about to watch.  They can be a cheap method of promoting your channel if you are looking for more subscribers. You can make your thumbnail to be eye-catching so that it will turn into a traffic attracting machine. You can also add your picture to your thumbnail. Adding your picture can make your channel outstanding and unique. Most professional youtube creators are also using thumbnails to promote their bands. So, if you are planning to be a successful youtube creator, let us take a walk together as we learn, how thumbnails can help us to be the success we are dreaming of. Three important things to know about thumbnail Thumbnails can help you promote your brand Thumbnails can serve as a tool for promoting your channel Thumbnails are not good clickbait. How to add your customized t