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Novay_Z [31]
3 years ago
5

Oh no! I dash (lose) my purse ​

Chemistry
1 answer:
max2010maxim [7]3 years ago
8 0

Answer:

Ok

Explanation:

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Imagine that you are the quality control analyst supervising the synthesis of aspirin, HC9H7O4, a monoprotic acid. One tablet is
Ber [7]

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>

8 0
3 years ago
Can someone help me with my science it’s super hard :(
Lunna [17]

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!!!

5 0
3 years ago
Ted and Emily played a mixed doubles tennis match against Jack and Brenda. In the second match, Ted and Brenda played against Ja
timofeeve [1]

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:

TE+JB\rightarrow TB+JE.

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:

AB+CD\rightarrow AD+BC,

which is similar to the reaction of the game, so the answer would be Double replacement.

8 0
1 year ago
which statment best describes the collision of gas particles according to the kinectic-molecular theory
Marina86 [1]
<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>
6 0
4 years ago
Halogens have ------ electron affinity
Fynjy0 [20]
They have high electron affinity
7 0
4 years ago
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