Answer:
11.19
Step-by-step explanation:
The amount of heat (in KJ) released when 3.5 moles of CH₄ react is 3115 KJ
<h3>Balanced equation</h3>
CH₄ + 2O₂ -> CO₂ + 2H₂O ΔH = 890 KJ
From the balanced equation above,
1 mole of CH₄ reacted to release 890 KJ of heat energy.
<h3>How to determine the heat energy released by 3.5 moles of CH₄</h3>
From the balanced equation above,
1 mole of CH₄ reacted to release 890 KJ of heat energy
Therefore,
3.5 moles of CH₄ will react ro release = 3.5 × 890 = 3115 KJ of heat energy
Thus, 3115 KJ of heat energy were released from the reaction
Learn more about enthalpy change:
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Answer:
<h2>x<-1</h2>
Step-by-step explanation:
I'm going to assume the 4 and 3 are exponents and the expression is 
.
The first step is to separate the coefficients of 3 and -6 from the variables and to multiply those as normal:
As for the variables, you want to recognize that 
means 
and 
means 
, so
In total, there are 7 a's being multiplied, so
Putting this all together, we have:
Answer:
for example if you gave 2x ten to the power of 3, that is scientific notation. So if you take it out of scientific notation you hwv3 2000.
Step-by-step explanation:
3 is amount of times you move to decimal to the right. So there is an invisible decimal after 2 so that gives you 2.0 So you take that decimal point and move it to the right three times. then you have 2000. but if you had 2× 10 to the power of 4, you would move the decimal to the right 4 times.
