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disa [49]
3 years ago
14

What is the mass percentage of C in caffeine, C₈H₁₀N₄O₂? Provide an answer to two decimal places.

Chemistry
1 answer:
mina [271]3 years ago
8 0

Answer:

46.8% should be. correct, I'm not fully sure though. : )

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malfutka [58]
The answer would be d
5 0
3 years ago
SOMEONE HELP MEEEE
slavikrds [6]
These are not questions but the directions or guide to completing your assignment.

I will provide you will with a choice of concept maps you can use:

- tree map

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-comparison map ( might be best)

Please vote my answer branliest! Thanks.
8 0
4 years ago
Read 2 more answers
Determine the number of moles of air present in 1.35 L at 750 torr and 17.0°C.
pshichka [43]

Answer: See the answer in image.

Explanation:

8 0
3 years ago
Read 2 more answers
Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction Pb ( NO 3 ) 2
nikklg [1K]

Answer : The volume of NH_4I solution required is, 2.93 L

The number of moles of PbI_2 formed from the reaction is, 0.662 moles.

Explanation :

First we have to calculate the initial moles of Pb(NO_3)_2.

\text{Moles of }Pb(NO_3)_2=\text{Concentration of }Pb(NO_3)_2\times \text{Volume of solution}

\text{Moles of }Pb(NO_3)_2=0.700M\times 0.945L=0.662mol

Now we have to calculate the moles of NH_4I

The balanced chemical reaction is:

Pb(NO_3)_2(aq)+2NH_4I(aq)\rightarrow PbI_2(s)+2NH_4NO_3(aq)

From the balanced chemical reaction we conclude that,

As, 1 mole of Pb(NO_3)_2 react with 2 moles of NH_4I

So, 0.662 mole of Pb(NO_3)_2 react with 0.662\times 2=1.32 moles of NH_4I

Now we have to calculate the volume of NH_4I

\text{Volume of }NH_4I=\frac{\text{Moles of }NH_4I}{\text{Concentration of }NH_4I}

\text{Volume of }NH_4I=\frac{1.32mol}{0.450mol/L}=2.93L

Now we have to calculate the moles of PbI_2

From the balanced chemical reaction we conclude that,

As, 1 mole of Pb(NO_3)_2 react to give 1 moles of PbI_2

So, 0.662 mole of Pb(NO_3)_2 react to give 0.662 moles of PbI_2

Thus, the number of moles of PbI_2 formed from the reaction is, 0.662 moles.

7 0
3 years ago
Please help me with this!
Nadya [2.5K]

Answer:

10. F

11. A

12. B

13. C

14. G

15. A

16. F

17. B

18. D

19. E

20. B

Explanation:

im sorry

ik some are probably incorrect

5 0
3 years ago
Read 2 more answers
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