Question
Use the table below to work out the mass in grams of 1 mole of water. Enter your answer as a number Element & Relative atomic mass (Ar) mathrm(H) & 1 mathrm(C) & 12 mathrm(O) & 16 mathrm(Na) & 23 mathrm(Ca) & 40
Answer
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Xerxes
Master · Tutor for 5 years
Answer
The mass in grams of 1 mole of water is 18 grams.
Explanation
The question is asking to calculate the mass in grams of 1 mole of water (H2O). To find this, we need to add up the atomic masses of the elements in water. The table provided gives us the relative atomic masses of several elements, including Hydrogen (H) and Oxygen (O), which are the elements that make up water. In a molecule of water, there are two Hydrogen atoms and one Oxygen atom. Therefore, we need to multiply the atomic mass of Hydrogen by 2 and add it to the atomic mass of Oxygen. Using the table, the atomic mass of Hydrogen is 1 and the atomic mass of Oxygen is 16. So, the calculation would be as follows:(2 * Atomic mass of Hydrogen) + Atomic mass of Oxygen= (2 * 1) + 16= 2 + 16= 18