Topic Content:
- Calculation from Chemical Equations
Example 9.3.1:
Sodium combines with oxygen as follows:
\( \scriptsize 4Na_{(s)} \: + \: O_{2(g)} \: \rightarrow \: 2Na_2O_{(s)} \)
What is the mass of oxygen needed to burn 4.6 g of sodium?
(Na = 23, O = 16)
Solution:
From the Equation:
4 moles of Na reacts with 1 mole of O2
Mass of 4 moles of Na = 4 × 23 = 92 g
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