3 years ago

Help!! 29 pointss

Chemistry

1 answer:

yaroslaw [1]3 years ago

3 0

10 is mixture of elements and compounds
11 is compound
12-15 are mixture of compounds

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RUDIKE [14]

Answer: read your book

Explanation: if you read it should be in there

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3 years ago

How many liters of carbon dioxide will be produced at STP if 3.56 g calcium carbonate reacts completely with carbon dioxide? CaC

sp2606 [1]

Answer:

V = 0.798 L

Explanation:

Hello there!

In this case, for this gas stoichiometry problem, we first need to compute the moles of carbon dioxide via stoichiometry and the molar mass of starting calcium carbonate:

$3.56gCaCO_3*\frac{1molCaCO_3}{100gCaCO_3} *\frac{1molCO_2}{1molCaCO_3} =0.0356molCO_2$

Next, we use the ideal gas equation for computing the volume, by bearing to mind that the STP conditions stand for a pressure of 1 atm and a temperature of 273.15 K:

$PV=nRT\\\\V=\frac{nRT}{P}\\\\V=\frac{0.0356mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm} \\\\V=0.798L$

Best regards!

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3 years ago

There are four substances, A, B C and D. A and C are pure substances. They cannot be broken down into anything simpler by chemic

yarga [219]

The answer is C Becuz D is a compound and that is the only answer that says it

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3 years ago

What occurs after cytokinesis is completed at the end of meiosis I?

arlik [135]

Answer. After cytokinesis is completed at end of meiosis - I two haploid cells are formed.on:

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3 years ago

Why does the moon Appear in the daytime????/?//

Mrrafil [7]

Answer: We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes

Explanation:

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3 years ago

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