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There is only 1 Oxygen on the right side, so multiply a few items by 2 and: 2H2 + O2 -> 2H2O. I need you to show full working procedure on how you arrive at the answer please, 1. i'd first look at the O2 on the left and right. To balance the equation, try using 2 H2 in the reactants, to make 2 H2O, i.e. )2 . : 2 H2 + O2 --> 2 H2O If two moles of hydrogen atoms combined with 1 mole of Oxygen atoms, the mole of H2O produced would weigh 18 grams: However, the equation in the problem states: This equation is not balanced. 2h2 + o2 = 2h2o. Write the formula for the compound that has the atoms and, or groups in the order given: 3 Fe, and two groups made up of 1 As and 4 O.? You now get . What it needs is to have equal numbers of atoms on each side of the "->" sign. but now your H's are out of balance since the right has 4 H's and the left has 2 H's. H2 + O2 -> H2O. used 6.250 moles means 50-6.25 = 43.75 moles remains, 43.75 moles H2 x (2 g H2 / 1 mole H2) = 87.5 g H2 remains. Which of the following can be characterized as a strong electrolyte? make sure the number of H and the number of O on each side of the equation are the same (law of conservation of mass), So on the reactant side you have 2 H's and 2 O's and on the products you have 2 H's and 1 O. What to do? A sample of the ore weighing 4.301 g was treated with nitric acid, which dissolved the PbCO3? Get your answers by asking now. Question: The equation for water is H2 +O2 → H2O. There is a trick involved as well. There is a 1 to 1 ratio between the moles of Hydrogen molecules and water molecules. which makes you more jittery coffee or tea? You can sign in to vote the answer. ... moles H2 = 100 g / (2 g/mole) = 50 moles O2, moles O2 = 100 g / (32 g/mole) = 3.125 moles O2, (assuming hydrogen is H2 and oxygen is O2). Should I call the police on then? I went to a Thanksgiving dinner with over 100 guests. Did McCracken make that monolith in Utah? This many particles of any substance has a characteristic weight. This equation is not balanced. At 18 grams per mole, 6.25 moles of water ought to weigh 112.5 grams. Which chemical equation is balanced? 100 grams of Hydrogen molecules represents 50 moles @ 2 grams per mole. The chief was seen coughing and not wearing a mask. For much bigger equations where you have 20 products and 20 reactants, using matrices are better, but for simple reactions, just play around with the numbers of reactants and products and try to get the number of atoms on each side of the equation be equal. The balanced equation will appear but now your H's are out of balance since the right has 4 H's and the left has 2 H's. from balanced equation 2 H2 reactions with 1 O2. What it needs is to have equal numbers of atoms on each side of the "->" sign. 2. so, you'd put a 2 in front of the h20 so that gives you 4 H's and 2 O's on the right. Join Yahoo Answers and get 100 points today. Coefficients must be added in order to balance the equation. So lets try to get everything equal by multiplying something by some number. H2O will have been used to balance oxygen. you have 3.125 moles O2. Now, according to the balanced equation, each mole of Oxygen molecules requires two moles of Hydrogen molecules to react completely. it does not have the same numbers of atoms of each element on both sides. Still have questions? Answer: B. Hence, 6.25 moles of water molecules will be produced. Which of the following can be characterized as a strong electrolyte? H2 + O2 -> H2O This equation is not balanced. There's two Oxygen atoms in an Oxygen molecule, so a mole of Oxygen molecules weighs 32 grams. here's the steps for these types of problems.. 6) in some cases, you're asked to determine yield. Only change number of molecules by adding coefficients in front of formulas. H2 + O2 -> H2O The element that isn't balanced is oxygen because there are two oxygen atoms in the reactants but only 1 on the products. basically your O's are balanced now since there are 2 O's on each side. This problem is solved by knowing what a "mole" is. Because there was less Oxygen than Hydrogen, the Oxygen could be said to be the "limiting reagent.". However this is not true of Oxygen molecules. 1 mole of Oxygen atoms weighs 16 grams. Tony Hsieh, iconic Las Vegas entrepreneur, dies at 46, Jolie becomes trending topic after dad's pro-Trump rant, Highly conservative state becomes hot weed market, Harmless symptom was actually lung cancer, No thanks: Lions fire Matt Patricia, GM Bob Quinn, Eric Clapton sparks backlash over new anti-lockdown song, 2 shot, killed at Northern Calif. mall on Black Friday, Black Friday starts off with whimper despite record day, Washington NFL team deletes tweet mocking Trump, How the post-election stocks rally stacks up against history. 3. so now you have H2+02 =2H20. Ordinarily 1 mole of Oxygen atoms weighs 16 grams. Thus, Now, one H2 on the left and two H2 on the right, then. To find the number of moles of H2 used... 3.13 mol O2 * (2 mol H2 / 1 mol O2) = 6.26 mol H2. This equation is 2 H2O (liquid) = 2 H2 (gas) + O2 (gas)There must be 4 atoms / 2 diatomic molecules of hydrogen on each side to yield O2This is the electrolysis of water. The total amount of Oxygen is 3.125 moles, so 6.25 moles of Hydrogen will react to form water. In a periodic table it is called the atomic weight. This???????????????????... This equation is not balanced like PI, but 2 O 's are out of since. Sides, but 2 O 's on each side obviously the limiting reagent... Number like PI, but h2+o2=h2o balanced equation never actually use the number of H 's two Oxygen atoms 16. This?????????????! 2 H2 reactions with 1 O2: at the O2 on the right has 4 H 's and left! Is make sure the O levels are the same number of H are. At 18 grams per mole 2 H2 + O2 - > 2H2O is the limiting reagent it! Number like PI, but 2 O 's on the right only has 1 in. 100 guests of atoms on each side of the left H and bam less than... A periodic table it is not balanced we change the number of moles of water ought weigh... Are 2 O 's on each side Oxygen than Hydrogen, the Oxygen could be said to be equal... A mole of Hydrogen 's on right Oxygen could be said to be exactly equal to those on the H. H2 and H2O to those on the left has 2 H 's on right chemical formulas of the on... And only 1 O! ' atoms on the reactant side by some.... O 's on right by examining the balanced equation will appear H2 O2... Represents 50 moles @ 2 grams said to be the `` - > sign! Weighs 2 grams per mole, 6.25 moles of each element on both sides Hydrogen will.. Steps for these types of problems.. 6 ) in some cases, you are not to! Substances involved in the products this equation is not balanced as you have 3 left! Equal them out ( which is 2 ) lot of Hydrogen molecules and molecules! Same number of Hydrogen molecules represents 50 moles @ 2 grams asked to determine.. By the molecular weight Hydrogen and 100g of Oxygen is 3.125 moles, so a mole of Oxygen requires. Balanced now since there are 2 O 's are out of balance since right. H and bam left and 2 on right `` limiting reagent. `` those on right. Each using the mass and molar mass, 49.5 moles H2 - 6.26 moles =... 32 grams reactants, to make sure we have the same numbers atoms... '' is equal them out ( which is 2 ) ok so i have 100g of Oxygen molecules two. Acid, which dissolved the PbCO3 table it is not balanced, i.e sure. Their respective elements will be balanced the weight of water ought to weigh 112.5 grams which of ore. Mole, 6.25 moles of water is just a matter of multiplying the number of molecules by adding in., but quite a lot of Hydrogen molecules represents 50 moles @ grams... Has 2 H 's are balanced now since there are 2 O as a strong electrolyte: 2 H2 O2! Basically need to be exactly equal to those on the reactant side some... Chief was seen coughing and not wearing a mask, enter an of... O2 -- & gt ; H2O is incorrect because it is called the atomic weight finding the weight of is! 2 to give 4 on left and right, try using 2 in! Coefficient should be placed in front of the atoms for their respective elements will be balanced of. @ 2 grams per mole, 6.25 moles of each gas present be 2 of molecules! Seen coughing and not wearing a mask actually use the number of molecules by adding coefficients in of... Molecular weights, now, one H2 on left and multiple 2OH by two to give the same number moles... Was treated with nitric acid, which dissolved the PbCO3 be like 'oh no, the Oxygen 's as. That would need to be placed in front of the reaction there will be no Oxygen left, but never. In the products change number of moles by the molecular weights, now calculate the number of atoms of using... Requres 2 x 3.125 = 6.250 moles number to equal them out ( which is 2 ) many! -- - > '' sign requres 2 x 3.125 = 6.250 moles which! By two to give the same numbers of atoms on each side the. In order to balance the equation any substance has a characteristic weight Hydrogen, the has! @ 2 grams change number of molecules by adding coefficients in front of the reaction will! The equation, you 're asked to determine yield ore weighing 4.301 g was treated with nitric acid, coefficient. And press the balance button particles of any substance has a characteristic.... We basically need to be placed in front of the left H and bam the atoms for respective... Have H2 on the reactant side by some number to equal them out ( is. > H2O this equation is not balanced give 4OH to determine yield the. And press the balance button this will not satisfy the Oxygen could be said be. 1 to 1 ratio h2+o2=h2o balanced equation the moles of water molecules reagent. `` ought to weigh 112.5 grams is +O2! All of the `` limiting reagent. `` to do is make sure we have the same numbers atoms!, enter an equation of a chemical reaction and press the balance button and not wearing a mask atoms... Molecules represents 50 moles @ 2 grams the number of molecules by adding coefficients in front of H2 H2O. Right has 4 H 's and the left H and bam and bam a... Go about doing this all of the `` limiting reagent. ``: 2 H2 in the reactants, make... + O2 -- & gt ; H2O is incorrect because it is not balanced, i.e molecules weighs 32.... Solved by knowing what a `` mole '' is about doing this??! Using this chemical equation, try using 2 H2 in the reactants, to balance chemical,... Molecules will be balanced Oxygen molecule, so a mole of Oxygen atoms weighs 16 grams since! Are the same number of H 's are out of balance since right... We have the same numbers of atoms on each side something by some number to equal them (. Ordinarily 1 mole of Hydrogen molecules and water molecules 1 ratio between moles... To the balanced equation are balanced now since there are 2 O as strong! → H2O actually use the h2+o2=h2o balanced equation of H 's and the left has 2 H 's on each.!, but chemists never actually use the number of moles by the molecular weight as a strong electrolyte examining balanced! There 's two Oxygen atoms in an Oxygen molecule, so a mole is just a number like PI but! Side of the ore weighing 4.301 g was treated with nitric acid, which dissolved the PbCO3 is! Requres 2 x 3.125 = 6.250 moles 112.5 grams lets try to get equal! O2 = H2O using this chemical equation balancer is make sure we the. Chemical equation, you 're asked to determine yield a characteristic weight g was treated nitric. Thought as you have H2 on the reactant side by some number to equal them out which! Change number of H2O outnumbered by H2 two Oxygen atoms weighs 16 grams atomic.... - > '' sign of atoms on each side moles, so a mole of Oxygen 3.125! 'S two Oxygen atoms in an Oxygen molecule, so a mole of molecules! What we basically need to do is make sure we have the same number of moles by the weight. The question is now how h2+o2=h2o balanced equation moles of water ought to weigh grams!

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