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erica [24]
3 years ago
8

How many neutrons does element X have if its atomic number is 56 and its mass number is 161?

Chemistry
1 answer:
lozanna [386]3 years ago
5 0
105 neutrons. hope this helps
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In the process of preparing liquid air for fractional distillation, one fraction will be separated as a solid. What is the chemi
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carbon dioxide CO₂

Explanation:

Each gas has a characteristic boiling point. You can separate a random sample of gases by gradually cooling the sample until each component gas liquifies. Some compounds, such as CO₂ never liquify. Instead, they turn directly into solids.

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One mole of carbon (12.0 g) in the form of crystalline graphite is burned at 25◦C and 1.000 atm pressure to form CO2(g). All of
iogann1982 [59]

Answer:

T₂ = 43.46 °C  

Explanation:

Given that:

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It means that energy released when 1 mole of carbon undergoes combustion = 393.5 kJ = 393500 J

Heat gain by water = Heat lost by the reaction

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m_{water}\times C_{water}\times \Delta T=Q

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T₂ = ?

Q = 393500 J

So,

5100\times 4.18\times (T_2-25)=393500  

T₂ = 43.46 °C  

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Hello.

The answer would be <span>A. Three feet of concrete.

Have a nice day.</span>
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