There is a trick involved as well. Which chemical equation is balanced? which makes you more jittery coffee or tea? so multiply the number of H's on the reactant side by some number to equal them out ( which is 2). The balanced equation will appear You now get . put a 2 in front of the left H and bam! I went to a Thanksgiving dinner with over 100 guests. This many particles of any substance has a characteristic weight. Get your answers by asking now. Ok so I have 100g of Hydrogen and 100g of Oxygen in. 1 mole of Oxygen atoms weighs 16 grams. A sample of the ore weighing 4.301 g was treated with nitric acid, which dissolved the PbCO3? 1. i'd first look at the O2 on the left and right. this is actual mass collected divided by theoretical. Thanks! A sample of the ore weighing 4.301 g was treated with nitric acid, which dissolved the PbCO3. 3. so now you have H2+02 =2H20. so 3.125 O2 requres 2 x 3.125 = 6.250 moles. 1 mole of Hydrogen atoms weighs 1 gram. H2 + O2 --> H2O is incorrect because it is not balanced, i.e. 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. Chem help, chemical bonds and wavelength. What to do? Get your answers by asking now. from balanced equation 2 H2 reactions with 1 O2. 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.? H2O will have been used to balance oxygen. 4 H's on each side! 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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. The atoms on the left have to be exactly equal to those on the right. Should I call the police on then? The question is now how many moles of each gas are present. How much H2O results is found by examining the balanced equation. and i'd be like 'oh no, the right only has 1 O!' There is a 1 to 1 ratio between the moles of Hydrogen molecules and water molecules. 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. So lets try to get everything equal by multiplying something by some number. 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. 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. Which of the following can be characterized as a strong electrolyte? Which of the following can be characterized as a strong electrolyte? and i'd be like 'oh no, the right only has 1 O!'. H2 + O2 -> H2O This equation is not balanced. So multiple H2O by 2 to give 4 on left and multiple 2OH by two to give 4OH. What it needs is to have equal numbers of atoms on each side of the "->" sign. Is now how many moles of each using the mass and molar mass 49.5... Equation will appear H2 + O2 = H2O using this chemical equation, you not... Because it is called the atomic weight problem is solved by knowing a! 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