Answer:
<h3>Na2O + H2O → 2NaOH</h3>
<h3>explanation:</h3>
Sodium oxide react with water to produce sodium hydroxide.
Answer:
340.0mg of aspirin in the tested sample tablet
Explanation:
The titration of aspirin with NaOH obeys the following equation:
HC₉H₇O₄ + NaOH → C₉H₇O₄⁻ + Na⁺ + H₂O
As the complete titration spent 18.87 mL of 0.1000M NaOH, moles of NaOH are:
0.01887L × (0.1000mol / 1L) = 0.001887 moles of NaOH. As 1 mole of base reacts with 1 mole of aspirin, moles of aspirin are: 0.001887 moles of aspirin.
As molar mass of aspirin is:
C: 12.01g/mol × 9: 108.09g/mol
H: 1.01g/mol × 8: 8.08g/mol
O: 16g/mol ×4: 64g/mol
<em>180.17g/mol. </em>Mass of aspirin in the tested sample are:
0.001887 moles of aspirin × (180.17g / mol) = <em>0.3400g = 340.0mg of aspirin in the tested sample tablet</em>
The heat energy required to change a unit mass of a solid into a liquid at constant temperature is called thermal equilibrium.
'Equilibrium' means balance, and thermal is used to define temperature.
Silver : [Kr] 5s2 4d9
Tell : [Kr] 5s2 4d10 5p4
Radium : [Rn] 7s2
Lawren: [Rn] 5f14 7s2 7p1
Hope this helps!!!
Heat it. Then the hydrogen will escape. Hope this helps
