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shepuryov [24]
3 years ago
12

What mass of natural gas (CH4) must you burn to emit 264 kJ of heat?

Chemistry
1 answer:
mariarad [96]3 years ago
7 0
The heat released by cpmolete the combustion of organic products with oxygen is called heat of combustion.

Here 1 mol of CH4 realesed 802.3 KJ

To emit 264 kJ you multiply you need (1 mol of CH4/802.3 kJ)* 264 kJ = 0.329 mol of CH4

The molar mass, MM, of CH4 is 12 g/mol + 4*1g/mol = 16 g/mol

The to obtain the mass multiply the number of moles times the molar mass:

mass = n * MM = 0.329mol * 16g/mol = 5.26 grams

Answer: 5.26 grams



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4 0
2 years ago
What mass of cucl2 is contained in 75.85 g of a 22.4% by mass solution of cucl2 in water?
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First  step: convert   22.4%  into   fraction
 that  is  22.4/100  which  is equivalent  to 0.224
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