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aleksandr82 [10.1K]
3 years ago
6

What tells the elements and ratio of atoms in a compound?

Chemistry
1 answer:
ladessa [460]3 years ago
5 0
"EMPIRICAL FORMULA" tells that!!
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How much heat is absorbed when 100.0g of ice is melted?
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What is a kilogram??
sukhopar [10]

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Read 2 more answers
When 1 mole of H2(g) reacts with F2(g) to form HF(g) according to the following equation, 542 kJ of energy are evolved H2(g) + F
topjm [15]

Answer: The reaction is exothermic. The value of q is  -542 kJ.

Explanation:

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and  for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and  for the reaction comes out to be negative.

Thus H_2(g)+F_2(g)\rightarrow 2HF(g) evolves heat , it is exothermic in nature. The value of q is -542kJ.

7 0
3 years ago
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. when 18.0 g of carbon were burned in the presence of
zavuch27 [327]
C + O2 --> CO2

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48g O = 3 moles 
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