D Question 2
5 pts
Calculate the number of moles of X2 required to produce 12.3 moles of XW3 using the balanced chemical
equation below:
X2 + 3 W2 --> 2 XW
Given (number, unit, and substance)
Wanted (number, unit and substance)
Conversion factor
moles XW3 =
moles X2
Final Answer (with correct sigfigs):
moles X2

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

C. 1s22s22p63s23p43d104s24p5

Silicon  6.0x10^23 is avogadro's number so the answer has to be 1 mole of whatever it is. since the molarity of silicon is equal to 28g/mol, this has to be the answer because 28g of si is 1 mole of si. 

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