Answer:
9.63 Km is the equivalent to 9,630 m.
9.63 Km is the equivalent to 9,630 m. TRUE
Explanation:
Methane molecule is depicted here
I have no clue let me delete this freaking app already
Answer:
The net chemical equation is:
Explanation:
Condictions for extraction of copper metal allow the reaction ocurrs.
First step yield 2 moles of 
, that later reacts with C, to poduce the copper metal.
Necessarily, reactions has to be balanced to know the proportion of each element.
In the first step oxygen (O2) replace sulfur (S), yielding sulfur dioxide and copper(I) oxide:
Next, copper(I) oxide reacts with carbon (C), yielding copper (Cu) and carbon monoxide:
At the end, to complete the net chemical reaction, it is necessary multiply second step for 2, since it is obtained two moles of from the first step. Then, we can sum both steps, reminding that species present in both terms are canceled.
Using the ideal gas law PV =nRTPV=nRT , we find that the pressure will be P =\frac{nRT}{V}P=
V
nRT
. Then, we'll substitute and find the pressure, using T = -25 °C = 248.15 K and R = 0.0821 \frac{atm\cdot L}{mol \cdot K}
mol⋅K
atm⋅L
:
P =\frac{nRT}{V} = \frac{(0.33\,\cancel{mol})(0.0821\frac{atm\cdot \cancel{L}}{\cancel{mol \cdot K}})(248.15\,\cancel{K})}{15.0\,\cancel{L}} = 0.4482\,atmP=
V
nRT
=
15.0
L
(0.33
mol
)(0.0821
mol⋅K
atm⋅
L
)(248.15
K
)
=0.4482atm
In conclusion, the pressure of this gas is P=0.4482 atm.
Reference:
Chang, R. (2010). Chemistry. McGraw-Hill, New York.
