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. 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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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