Thursday, March 19, 2020

Understanding Informal Speak Gonna and Wanna

Understanding Informal Speak Gonna and Wanna Wanna and gonna are two examples of informal spoken American English. Wanna means want to, and gonna means going to. Youll hear these phrases in movies, pop music and other forms of entertainment, although you are less likely to hear them in more formal shows, like the news. These two expressions are not generally used in written English but in spoken English. Wanna and gonna are examples of reductions. Reductions are short, commonly used phrases that are spoken quickly. These reductions tend to be used for function words such as auxiliary verbs. It is important to remember that there are  differences in American English and British English pronunciation. British English also has its own exceptions in pronunciation.   There are different views on whether students should use this type of pronunciation. In my opinion, students who live in North America should at least be familiar with these forms as they will hear them every day. If students decide to use this pronunciation, they should remember that it is appropriate only for informal spoken English and should not be used (except for texting, perhaps) in written English. Reductions in Questions The most common reductions are found at the beginning of questions. Heres a list of important reductions with the pronunciation written out to help you learn to recognize them in everyday American English. To begin with, listen to this reduction pronunciation sound file of the most common questions. Are you ...? aryaCan you ...? kinyaCould you ...? kudjaWould you ...? wudjaDid you ...? didjaDo you ...? dojaDont you ...? donchaWill you ...? wiljaDo you want to ...? doyawannaAre you going to ...? aryagonnaDo you have to ...? dijahafta Focus on the Main Verb If you choose to use reductions, it is important to focus on the main verb in the question to correctly pronounce using reductions. In other words, we quickly speak over the reduced forms (are you, could you, etc.) and stress the main verb. Listen to these example reduced questions to hear how the main verb is stressed. Are you ...? arya Are you enjoying yourself?Are you going to help me tonight? Can you ...? kinya Can you say that again?Can you understand me? Could you ...? kudja Could you help me?Could you visit next month? Would you ...? wudja Would you like to have dinner?Would you answer my question? Did you ...? didja Did you see him?Did you buy it? Do you ...? dija Do you play tennis?Do you eat fish? Dont you ...? doncha Dont you love it?Dont you understand? Will you ...? wilja Will you come with me?Will you finish tonight? Do you want to ...? diyawanna Do you want to have fun?Do you want to eat out? Are you going to ...? aryagonna Are you going to leave?Are you going to have lunch? Do you have to ...? dijahafta Do you have to stay?Do you have to work today? Gotta and Wanna Two of the most common reductions are gotta and wanna. Gotta is the reduction of got to. Its rather strange because its use means have to. In other words, in informal American English I got to get up early means I have to get up early. This is then further reduced to I gotta get up early. Wanna means want to and is used to indicate the desire to do something. For example, I wanna go home. means I want to go home. A synonymous expression is also I would like to go home. However, this form is much more formal.

Tuesday, March 3, 2020

Example of Molar Mass Calculation

Example of Molar Mass Calculation You can calculate the molar mass or the mass of one mole of an element or molecule if you know the formula for the substance and have a periodic table or table of atomic masses. Here are some worked examples of the molar mass calculation. How to Calculate Molar Mass The molar mass is the mass of one mole of a sample. To find the molar mass, add the atomic masses (atomic weights) of all of the atoms in the molecule. Find the atomic mass for each element by using the mass given in the Periodic Table or table of atomic weights. Multiply the subscript (number of atoms) times the atomic mass of that element and add the masses of all of the elements in the molecule to get the molecular mass. Molar mass usually is expressed in grams (g) or kilograms (kg). Molar Mass of an Element The molar mass of sodium metal is the mass of one mole of Na. You can look up that answer from the table: 22.99 g. You may be wondering why the molar mass of sodium isnt just twice its atomic number, the sum of the protons and neutrons in the atom, which would be 22. This is because the atomic weights given in the periodic table are an average of the weights of the isotopes of an element. Basically, the number of protons and neutrons in an element may not be the same. The molar mass of oxygen is the mass of one mole of oxygen. Oxygen forms a divalent molecule, so this is the mass of one mole of O2. When you look up the atomic weight of oxygen, you find it is 16.00 g. Therefore, the molar mass of oxygen is: 2 x 16.00 g 32.00 g Molar Mass of a Molecule Apply the same principles to calculate the molar mass of a molecule. The molar mass of water is the mass of one mole of H2O. Add together the atomic masses of all of the atoms of hydrogen and water in a molecule of water: 2 x 1.008 g (hydrogen) 1 x 16.00 g (oxygen) 18.02 g For more practice, download or print these molar mass worksheets: Formula or Molar Mass Worksheet (pdf)Formula or Molas Mass Worksheet Answers (pdf)