Question

求解几道英文的化学题，急！

（1）In dry atmospheric air, the four most abundant components are N2,
X = 0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and
CO2, X = 4.066x10-4. Calculate the partial pressure of
O2, in torr, under standard atmospheric conditions.（2）Oxygen gas can be generated by heating KClO3 in the presence of
some MnO2.2KClO3 → 2KCl + 3O2
If all the KClO3 in a mixture containing 2.46 g KClO3
and 0.35 g MnO2 is decomposed, how many liters of O2 gas
will be generated at T = 29.0°C and P = 752.6 torr?（3）A pressurized can of whipped cream has an internal pressure of 1.175 atm at
26°C. If it is placed in a freezer at -20°C, what is the new value for its
internal pressure (in atmospheres)?（4）In dry atmospheric air, the four most abundant components are N2,
X = 0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and
CO2, X = 4.066x10-4. Calculate the partial pressure of
N2, in torr, under standard atmospheric conditions.（5）Elemental analysis is performed on an organic liquid with a fishy odor.
Vaporization of 240.0 mg of the compound in a 180 mL bulb at 170°C gives a
pressure of 435.0 torr. What is the molar mass of this compound?（6）A mouse is placed in a sealed chamber with air at 762.0 torr. This chamber is
equipped with enough solid KOH to absorb any CO2 and H2O
produced by the mouse. The gas volume in this chamber is measured to be exactly
2.50 L, the temperature is held constant at 297 K. After two hours the pressure
inside the bottle falls to 723.1 torr. What mass of oxygen has the mouse
consumed?急，求答案！

Answer 1

（1）在干燥的空气中，四个最丰富的成分N2，

X =
0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and

x = 0.808；O2，x = 0.1915；AR，X
= 9.34x10-5；和

CO2, X =
4.066x10-4. Calculate the partial pressure of

CO2，X = 4.066x10-4。计算分压

O2, in
torr, under standard atmospheric conditions.（2）Oxygen gas can be generated by
heating KClO3 in the presence of

O2，在托，在标准大气条件下。（2）氧气可以通过在存在加热氯酸钾生成

some
MnO2.2KClO3 → 2KCl + 3O2

一些mno2.2kclo3→2kcl + 3O2

If all
the KClO3 in a mixture containing 2.46 g KClO3

如果在一个含有2.46克氯酸钾混合所有的氯酸钾

and 0.35
g MnO2 is decomposed, how many liters of O2 gas

和0.35 g MnO2分解，多少升的氧气

will be
generated at T = 29.0°C and P = 752.6 torr?（3）A pressurized can of whipped cream
has an internal pressure of 1.175 atm at

将在t =
29，P = 752.6乇°C产生的？（3）加压的奶油有1.175个大气压的压力在内部

26°C. If
it is placed in a freezer at -20°C, what is the new value for its

26°如果放在冰箱在20°C，什么是新的价值

internal
pressure (in atmospheres)?（4）In dry atmospheric air, the four most abundant
components are N2,

内部的压力（大气中）？（4）在干燥的空气中，四个最丰富的成分N2，

X =
0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and

x = 0.808；O2，x = 0.1915；AR，X = 9.34x10-5；和

CO2, X =
4.066x10-4. Calculate the partial pressure of

CO2，X = 4.066x10-4。计算分压

N2, in
torr, under standard atmospheric conditions.（5）Elemental analysis is performed
on an organic liquid with a fishy odor.

N2，在托，在标准大气条件下。（5）元素分析是一个有鱼腥味的有机液体进行。

Vaporization of 240.0 mg of the compound in a 180 mL bulb at 170°C gives
a

在170°C 240毫克在180毫升的灯泡的化合物蒸发了

pressure
of 435.0 torr. What is the molar mass of this compound?（6）A mouse is placed in a
sealed chamber with air at 762.0 torr. This chamber is

435乇的压力。该化合物的摩尔质量是什么？（6）鼠标是在762乇放置在空气密封室。本室

equipped
with enough solid KOH to absorb any CO2 and H2O

配备足够的固体氢氧化钾吸收CO2和H2O

produced
by the mouse. The gas volume in this chamber is measured to be exactly

由鼠标产生。本室的气体体积的测量是准确的

2.50 L,
the temperature is held constant at 297 K. After two hours the pressure

2.50 L，温度保持在297 K的恒压后两个小时

inside
the bottle falls to 723.1 torr. What mass of oxygen has the mouse

瓶内下降到723.1乇。是大众氧鼠标

consumed?

消费？
这是中文翻译，希望对您有用。

Answer 2

第一部分是求空气中氧气的分压，还要用托表示压强单位101325PaX 0.1915=？，然后换算能托再除以133Pa，因为1torr=133pa，下面一会再看

追问

谢谢。第二道题呢？

追答

太忙了

Answer 3

rature is held constant at 297 K. After two hours the pressure
inside the bottle falls to 723.1 torr. What mass of oxygen ha