help on the followong question Evaporation of acetone: ndathermi 3. (I p) How ma

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help on the followong question

Evaporation of acetone: ndathermi 3. (I p) How many grams of CO, are formed when 4.75 mols of methane are reacted with excess O, according to the following chemical equation: 4. (2 p) What is the heat associated with the complete reaction of 7.5 mols of ammonia? AH-906 kJ 5. (I p each) Write the formation reactions for the following compounds. HCIO: Na CO: 6, (2 p) Use standard enthalpies of formation to determine ??'m for the reaction: Fe O(s)+3 CO(g)> 2Fe(s)+ 3 CO (g) 7. (I p) What is the specific heat capacity of a metal rod that weighs 150 g and increases its temperature from 45 °C to 50 C when 320 J of heat are transferred to it?

Explanation / Answer

Ans 3 :

The balanced reaction is given as :

CH4 + 2O2 = CO2 + 2H2O

1 mole CH4 makes 1 mole of CO2

So 4.75 moles of methane will make 4.75 moles of CO2

So the mass of CO2 formed = 4.75 x molar mass of CO2

= 4.75 x 44.01

= 209.05 grams

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