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vaieri [72.5K]
3 years ago
14

Why is agar medium used in Petri dishes?

Chemistry
1 answer:
Roman55 [17]3 years ago
4 0

Answer:

C is the correct answer.

Explanation:

Agar provides a solid growth surface for the bacteria, upon which bacteria reproduce until the distinctive lumps of cells.

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Propane (c3h8) is burned in oxygen to produce carbon dioxide and water. the heat of combustion of propane is -2012 kj/mole. how
Olegator [25]
C_{3} H_{8} + 5 O_{2} ---\ \textgreater \  3CO_{2}  +4H_{2}O    (-2012 \frac{kJ}{mol} )


3 mol                10 mol


C_{3}H_{8} is /excess /reactant

because 3 mol propane require 15 mol oxygen (by reaction)

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so 

2012 ( kJ/mol)*2 mol =4024 KJ heat will be given off

Correct answer is number 4.



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2 years ago
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