It forms magnesium nitride
Answer:
The proton gradient produced by proton pumping during the electron transport chain is used to synthesize ATP. Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin (like a water wheel) and catalyze conversion of ADP to ATP.
Answer : 19.9 mL
Explanation : We have the moles of Calcium chloride and the weight of it as 1.28 g,
Here, molarity has to be related with the volume so, 0.580 M = 0.580 mol/L
so now in 1.28 g there will be : 1.28 X (1 g / 111 mol of calcium chloride) = 0.01153 mol
Now, we can find out the volume from this;
0.01153 mol X (1 L / 0.580 mol) X (1000 mL / 1 L) = 19.9 mL
Hence, the volume will be 19.9 mL
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>
Answer:
n=N/Na
n = \frac{8.23 \times {10}^{22} }{6.02 \times {10}^{23} } = 0.1367 \: mol
answer: 0.14 mol
Explanation:
