Total mass of oxygen = (15/164) * 96 g Atomic mass is the number of grams per mole of the element. Assuming the Water is pure, 10g of water contains approximately 3.33*10^23 water molecules (via conversion to moles of water, and multiplying it by Avagadro's number), multiply this by another 3 (since every water molecule contains 3 atoms, 2 hydrogen and 1 oxygen), leaving us with 10^24 atoms in total. Since each water molecule has 1 oxygen atom (H2O), the number of oxygen atoms is the same as the number of water molecules. Water is a tasteless, odorless liquid at ambient temperature and pressure.Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue colour. (ii) relationship between number of hydrogen atoms and number of water molecules: From the molecular formula we see that 1 molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. Finally, we use avogadro's number to determine the number of oxygen atoms present in the given mass of water. Each molecule only has 1 atom of Oxygen in it, so there are 9.970 * 10^26 atoms of Oxygen in 29.8 L of water. 1 water molecule(H 2 O) contain 2 hydrogen atoms. 9. Oxygen has an atomic weight of 15.9994. The H2 in H2O is not 2 hydrogens bonded to one another and then to oxygen, but two separate hydrogen atoms, each bonded an oxygen atom. In its stable molecular form, oxygen exists as two atoms and is written O2. There are 3 atoms in water, 1 oxygen, 2 hydrogen. The ratio of atoms we will need to make any number of water molecules is the same: 2 hydrogen atoms to 1 oxygen atom. (1) Mass of a single oxygen atom. So, 1 mole H2O = 1.2044×10^24 hydrogen atoms. Lewis structure of water molecule contains two single bonds around oxygen atom. From the periodic table we see the atomic weight of hydrogen is 1.0079 and the atomic weight of oxygen is 15.9994. 0 0 g of water in a beaker. Water (H 2 O) is made from 2 atoms of hydrogen and 1 atom of oxygen. The total number of atoms when glucose and oxygen react stays the same when carbon dioxide and water are produced. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. The 15.9994 g of oxygen referred to in Moles: the Number of Water molecules would contain 6.022 × 10 23 oxygen atoms, for example, and the 2.016 g of hydrogen that reacts with it would contain twice as many (12.044 × 10 23) hydrogen atoms. 6. Add your answer and earn … The total number of atoms when carbon dioxide and water react stays the same when glucose and oxygen are produced. There are two atoms of hydrogen (H2) and one atom of oxygen (O) in each molecule of water. Oxygen is the chemical element with the symbol O and atomic number 8. Toxic compounds are for example hyper oxides and peroxides. So, number of oxygen atoms in 0.03 mole of water = 0.03 x 6.022 x 10 23 = 1.8 x 10 22 atoms of oxygen. Question 2 (True/False Worth 2 points) … So you want to find 6.08 / 18.02 * 6.022 * 10^23 = 2.032 * 10^23 The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are … Hydrogen has an atomic weight of 1.0079, and so a mole of hydrogen weighs just over 1 gram. D. 6. This means that 18 grams of water contains one 16-gram mole of oxygen and two 1-gram moles of hydrogen. Water molecules also contain four lone pair electrons on the oxygen atom. But you only have 15/164 of a mole. Calculate the number od water molecules and number of Hydrogen and oxygen atoms in 3.26 g of water. As N = Avogadros Number is 6.023 * 10^23. 1 0. You must also read the question carefully, they asked for number of ATOMS per mole of water, and H2 is a molecule made of 2 hyrdogen atoms, so it would still be 3 moles of atoms per mole of water. Ans. Molar mass of sucrose = 342 g. No. One mole of oxygen, therefore, has a mass of just under 16 grams. (9.90 mol)(6.022×10^23 atoms/mol) = 5.96×10^24 atoms of oxygen. The bonds which hold the hydrogen and oxygen together are called covalent bonds - they are very strong. This means that your sample will contain #3.343 * 10^(23)color(green)(cancel(color(black)("molec. (H 2 O) that contains two hydrogen atoms each sharing a pair of electrons with an oxygen atom (see Figure 1).