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: here is a description of what they look like since I cannot see the diagram.
Mitochondria- wavy line
Ribosomes- little dots
Chromosome- X
Nucleus- Circle with bite taken out of it
Endoplasm- Bubble
Nuclear membrane- Outer layer/bubble
Golgi-wavy circle thing
Vacuole- Bigger circle (but not nucleus)
Cytoplasm- its the jelly on the inside
Cell wall- only in plant cells, looks like a box
Cell membrane- The outmost part of the animal cell, the barrier.
I sure hope this helps!!!
Answer:
Double replacement.
Explanation:
Chemical Reactions => Double Replacement Reactions.
Let's call Ted as T, Emily as E, Jack as J, and Brenda as B.
In the first match, we have T and E playing against J and B; and in the second match, we have T and B playing against J and E. We can state a 'reaction' of this if the first match would be the reactants and the second match the products:
You can note that this is similar to a double replacement reaction, remember that a double-replacement reaction is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement reaction is:
which is similar to the reaction of the game, so the answer would be Double replacement.
<span>As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy. hope this help:)</span>
They have high electron affinity
