Methanol (ch3oh) can react with oxygen gas to produce formaldehyde (h2co) and water. how many mole of formaldehyde can be produced by reacting 4.0 moles of methanol with 4.0 moles of oxygen gas

explanation

write   a balanced chemical reaction

that is 2 CH3OH (l) +  O2 (g) →  2HCOH (l)+ 2H2O (l)

from the reaction above  2 moles of CH3OH reacted with 1 moles of O2 to form 2 moles of HCOH and two moles of H2O

This imply that O2 is the limiting reagent ,therefore by use of mole ratio between  O2 : HCOH which is 1 :2 the moles of HCOH= 2 x4 =  8 moles

Answer : The number of moles of formaldehyde produced will be, 4 moles.

Explanation :

Moles of = 4.0 mole

Moles of = 4.0 mole

First we have to calculate the limiting and excess reagent.

The balanced chemical reaction will be :

From the balanced reaction we conclude that

As, 2 moles of react with 1 mole of

So, 4 moles of react with moles of

From this we conclude that, is an excess reagent because the given moles are greater than the required moles and is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of .

As, 2 moles of react to give 2 moles of

So, 4 moles of react to give 4 moles of

Therefore, the number of moles of formaldehyde produced will be, 4 moles.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.