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How do you balance a chemical equation?
Before writing a chemical reaction, you must know a few things. You must know what the reactants are, and what the molecular formula of each one is. You must also know what the products of the reaction are, and how to write the molecular formulas for the products. Then you can go about writing the equation for the reaction and balancing the reaction.In a chemical reaction, elements combine into compounds, compounds decompose back into elements, or transform existing compounds into new compounds. Because atoms are indestructible in chemical reactions, the same number of atoms of element must be present before and after any reaction. This is based on the principle of conservation of mass.To balance a chemical equation, you must use stepwise reasoning. Sometimes there is some trial and error involved until you get enough practice to be good at it. It is something best learned with a lot of practice! The bottom line in any balanced reaction, and the way to test if you've done it correctly is this:--HOWEVER MUCH OF ONE ELEMENT GOES IN, THE SAME AMOUNT MUST COME OUT!Let's use this example: the decomposition of ammonium nitrate (NH4NO3) to dinitrogen oxide (N2O) and water (H2O). The unbalanced reaction is this:NH4NO3 ---> N2O + H2OOn the LEFT side of the arrow are REACTANTS.One the RIGHT side of the arrow are PRODUCTS.Notice that the way the reaction is written not, 4 hydrogen atoms (H) go in, but only 2 come out (in the H2O) and also 3 oxygen atoms (O) go in as reactants, only 2 come out as products. This is NOT balanced! The nitrogen (N), by chance, does happen to be balanced: 2 go in as reactant, and 2 come out as products. To balance the reaction, we will add coefficients, or numbers, in front of certain reactants and products to make sure what goes in comes out!First, assign 1 as the coefficient of one species (or compound or element), and usually you want to chose the most complicated compound containing the most elements. Here we should pick NH4NO3.Secondly, find the elements that appear in only one other place in the equation, and assign coefficients to balance the numbers of their atoms. In our example, N appears in only one other place (N2O), and a coefficient of 1 for N2O ensures that for the 2 N's that go in, 2 come out. Hydrogen appears in H2O, and so its coefficient is 2 to balance the 4 H atoms on the left side. So now we have:NH4NO3 ---> N2O + 2 H2OFinally, check that the last element, O, is also balanced. In this case it is, as there are 3 on the left side and 3 on the right side. You don't need to put the "1" in front of the NH4NO3 and N2O. The number one is implied if you don't write a number.Let's do it again for a different example, the burning of butane, C4H10, in oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O). The unbalanced reaction is thenC4H10 + O2 -----> CO2 + H2OHere is a good tip: leave blanks in front of each compound or element in the reaction so you have room to add the coefficients. Like this:___ C4H10 + ___ O2 -----> ____ CO2 + ____ H2Again, butane is the most complicated compound, so assign its coefficient to be one.C4H10 + ___ O2 -----> ____ CO2 + ____ H2Since there are 4 C's in butane, and the only place the C can go is into CO2, the coefficient in front of CO2 must be 4. In the same way, there are 10 H's in butane, and they can only go into the water, and so the coefficient in front of H2O must be 5 (10 H's divided by 2 H's per water).C4H10 + ___ O2 -----> 4 CO2 + 5 H2OFinally, we have to balance the oxygens. On the right we have 4*2 = 8 in the CO2, and 5*1 = 5 in the H2O, so that gives a total of 8+5 = 13. So now we have to make sure that 13 oxygen atoms are also on the left. Since we have O2 as the reactant, we can use a fraction as a coefficient to make the numbers come out right. Since we want 13 total, what number times 2 equals 13? That would be 13/2! So now we have:C4H10 + 13/2 O2 -----> 4 CO2 + 5 H2ONote that there is NOTHING WRONG WITH USING FRACTIONS in a balanced chemical equation. However, often people prefer to eliminate fractions because it makes it a bit easier to look at and work with. To do that, we simply multiply everything (on both side of the arrow) by 2:2 C4H10 + 13 O2 -----> 8 CO2 + 10 H2O--TO SUMMARIZE:Sometimes you can balance a reaction by just looking at it and figuring it out very easily (it's called doing it "by inspection"). Other times it can be trickier and these steps can help.--Step 1: Assign the number 1 as the coefficient to one species. Choose the most complicated one, with the most different elements in it.--Step 2: Identify, one by one, elements that appear in only one species whose coefficient is not yet determined. Choose that coefficient to balance the number of atoms of that element. Continue until all coefficients are identified. Check to make sure that the number of atoms of each element on the left is equal to the number on the right of the arrow!--Step 3: If you want (this is optional!), you can multiply the whole equation by the smallest integer that will get rid of any fractions.Tricks:Sometimes it is difficult to balance an equation (non-combustion) with water in it and a hydroxide as a reactant. It is easier to write water as HOH (as opposed to H2O) so you can balance the hydroxide ions rather than the hydrogen and oxygen atoms solely. HCl + Ca(OH)2 ---> CaCl2 + HOHTake a look at the calcium hydroxide as a reactant. We know that there are two molecules of hydroxide, while there is only one as a product (may help to see it if you say H(OH) as a hydroxide molecule). So in the beginning, just balance the hydroxides, adding a "2" in front of the water molecule to bring a total of two hydroxide groups to balance the two from the reactant side. Then just balance the chlorine by adding a "2" in front of the hydrochloric acid.2HCl + Ca(OH)2 ---> CaCl2 + 2HOHFinally, you can count up all the individual hydrogen and oxygen atoms to make sure they are equal on both sides. This may seem like extra work, but it will actually simplify things and lets you balance more of the equation at once, rather than dealing with individual atoms. Formulas can become more complicated than this, and the HOH trick is a good one to have.
What is the Name for Waste material produced during coin manufacture?
The waste material produced during coin manufacture is called "blanks." Blanks are usually small, round metal discs that are punched out of large sheets of metal and are left over after the coin stamping process.
What is a reagent blank?
A Reagent Blank contains the reagent(s) in the same concentration(s) and solvent(s) as would be contained in a sample prepared for analysis such that the Reagent Blank and a prepared sample only differ in that the Reagent Blank contains no sample and that none of the analyte(s) of interest has(have) been intentionally added to the blank. For samples containing radioactive isotopes that are prepared then analyzed by alpha particle, beta particle, or gamma ray counting techniques; analytical methods for the direct determination (no reagents are used) of the concentration of elements, ions, or compounds that absorb visible, ultraviolet, or infrared light, such as certain analyses by UV-Vis spectrophotometry and analysis by inductively-coupled plasma - atomic emission spectrophotometry (ICP-AES), ICP - mass spectrometry (ICP/MS) or atomic absorption (AA) spectrometry, preparatory blanks, often called "Prep Blanks," are used. These types of blanks are prepared exactly as if they were samples, for example by preparatory chromatography, solvent extraction, purge-and-trap methods, or acid or fusion digestion, but without any sample added. This type of blank is not technically a Reagent Blank, although it may sometimes be named as such. Reagent blanks and Prep blanks are used so that the contribution of any species not present, or not expected to be present, in the sample alone that adds to or subtracts from the detection signal may be evaluated or subtracted out (or added to) the detected concentration of the analyte.
What are raw materials use in coins?
Raw materials used in coins typically include metals such as copper, nickel, zinc, and sometimes steel. These metals are combined in specific ratios to create the desired composition for the coin's value and durability. The process of minting coins involves shaping these raw materials into coin blanks, which are then stamped with designs and inscriptions before being put into circulation.
In analytical chemistry what is mean by blank?
A blank is a sample in which you will find none of the analyte you're looking for in your samples. For example, simple deionized water is often used as a blank when analyzing a group of samples that are concentrated in water.
What coefficients must be placed in the blanks so that all atoms are accounted for in the products. Please explain why the answer is correct?
To balance a chemical equation, make sure the number of atoms of each element is the same on both sides. For example, in the equation _H2 + _O2 -> _H2O, the coefficients would be 2, 1, and 2 respectively. This balances the equation because there are 2 H atoms and 2 O atoms on each side.
What are inifintly equations?
Linear equations with one, zero, or infinite solutions. Fill in the blanks to form a linear equation with infinitely many solutions.
What is the birth name of Jamie Blanks?
Jamie Blanks's birth name is James Blanks.
How many automobile license plates can be made involving 2 letters followed by 4 digits?
There are 26 possibilities for the first two blanks and 10 possibilities each for the last 4 blanks. Then we can derive this equation: 26*26*10*10*10*10= 6,760,000 possibilities.
When did Ernests Blanks die?
Ernests Blanks died in 1972.
When was Ernests Blanks born?
Ernests Blanks was born in 1894.
When was Fill in the Blanks created?
Fill in the Blanks was created in 2010.
When was Killer Blanks created?
Killer Blanks was created in 1995.
If each of the numbers 1 through 9 are used exactly once to fill in the blanks complete this equation 00000 minus 0000 equals 33333?
41286 - 7953=33333
How many blanks in words with friends?
There are 2 blanks In words with friends
When was Billy Blanks born?
Billy Blanks was born on September 1, 1955.
What is Billy Blanks's birthday?
Billy Blanks was born on September 1, 1955.
