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kirza4 [7]
3 years ago
5

A 3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. Determine the concentration, in parts per million, of the h

ydrogen cyanide in this sample.
Chemistry
1 answer:
notka56 [123]3 years ago
7 0
 The answer is: 231.25 ppm. 
To solve this, compute first the percentage of hydrogen in the 3.2 g air sample. % = (0.00074g/3.2g)*100 = 0.023125%
1% = 10,000ppm <--- use this as conversion factor. 

0.023125%(10,000ppm/1%) = 231.25 ppm 
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group 1, 2 and 3 tend to get rid of electrons and start to form compounds with groups 7, 6, and 5.

Explanation:

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3 years ago
Nah I'm gonna fail this quiz help please ​
Eva8 [605]

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It has 2 eyes

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Que diferencia hay entre drogas estimuladoras depresoras y perturbadoras del sistema nervioso
12345 [234]

Answer:

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3 0
3 years ago
Copper can be shaped into wires because it is
Lelechka [254]

.ANSWER:Copper is a ductile metal

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7 0
3 years ago
Transuranium elements are artificial and may be prepared by a fusion process in which heavy nuclei are bombarded with light ones
Scilla [17]

Answer:

_{97}^{345}\textrm{Bk}

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

Am has an atomic number of 95. So correct reaction is:-

^{343}_{95}\textrm{Am}+^{4}_{2}\textrm{He}\rightarrow ^A_Z\textrm{X}+2^1_0\textrm{n}

To calculate A:

Total mass on reactant side = total mass on product side

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To calculate Z:

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Hence, the isotopic symbol of unknown element is _{97}^{345}\textrm{Bk}

7 0
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