How many moles of oxygen atoms are in 4 moles of H2O?
4 moles of oxygen atoms are present in 4 moles of H2O
5 moles H2O (1 mole O/1 mole H2O)(6.022 X 1023/1 mole O)(1 mole O atoms/6.022 X 1023) = 5 moles oxygen atoms =================( as you see this is a formal set up that you do not need to use fully as Avogadro's number is over itself as a form of one ) 5 moles H2O (2 moles H/1 mole H2O)6.022 X 1023/1 mole H)(1 mole H atoms/6.022 X 1023) = 10 moles hydrogen atoms ====================
A mole is a number which can be expressed in scientific notation, like so: 6.022*10^23, or expanded, like so: 602,200,000,000,000,000,000,000. Water, or H2O, consists of three atoms, one of oxygen and two of hydrogen. If you have two moles of this, then one must multiply 3 by 2 mol, giving the number 1.8066*10^24.
One. A mole is a measure of the number of 'objects' in a sample. Since each water molecule has 1 oxygen atom (H2O), the number of oxygen atoms is the same as the number of water molecules. However, for Hydrogen, there are 2 H atoms for every water molecule, so there would be 2 moles of Hydrogen in 1 mole of water.
Heptane has the molecule formula: C7H16 When burning things such as alkanes the products are most likely H2O and CO2. So lets make a reaction equation for this. C7H16 + O2 --> CO2 + H2O As you can see the amount of atoms before and after the reaction arrow dont match, just play with the numbers till the number of carbon, hydrogen and oxygen atoms before and after the arrow are the same. C7H16 +…
How many times larger is the number of hydrogen atoms than oxygen atoms in a polysaccharide molecule?
H2O: 44g x 1 mol/18 g = 2.44 moles and 2.44 moles x 6.02x10^23 atoms/mole = 1.5x10^24 atoms S-32: 44g x 1mol/32g = 1.375 moles and 1.375 moles x 6.02x10^23 atoms/mole = 8.3x1^23 atoms O-16: 44g x 1 mol/16g = 0.6875 moles and 0.6875 moles x 6.02x10^23 atoms/mol = 4.2x10^23 atoms H-1: 44g x 1mol/1g = 44 moles and 44 moles x 6.02x10^23 atoms/mole = 2.6x10^25 atoms
Write out the equation first: 10H2 + 10O2 --> xH2O Since there are 2 moles of Hydrogen for every mole of Oxygen and equal moles of both are given, the Hydrogen limits the reaction as the limiting reactant. 10 moles of Hydrogen can make 10 moles of H2O with 5 moles of Oxygen left over. Think of it logically: H2 is two hydrogen atoms and water needs two hydrogen atoms, so it is a one-to-one…