You can take your pick. The US Bureau of Standards says 760 mm Hg

**and**20 degrees Celsius. The International ...3 Answers · Science & Mathematics · 13/11/2009

There are several recognized standards for

**pressure and temperature**ratings. These typically cover flanges**and**indirectly valves...1 Answers · Science & Mathematics · 08/11/2008

At 20 °C and 101.325 kPa, dry air has a density of 1.2041 kg/m3. Volume=8*6*4=192m3 density = mass / volume mass = density*volume mass=1.2041*192 mass =231.1872 kg

4 Answers · Science & Mathematics · 10/05/2009

... = 20% H mass of C in the sample = 1.34 - .2678 = 1.0722 g

**and**1.0722 / 1.34 % C = 80 % C moles of gas = PV / Rt...1 Answers · Science & Mathematics · 24/11/2012

### if i have 44.8 liters of nitrogen gas at

**standard temperature and pressure**, how much will it weigh?44.8 l is 2 moles of gas. One mole of diatomic nitrogen gas (N2) would mass 28 g. Twice that is 56 g. Seems to me the answer ought to be (B).

1 Answers · Science & Mathematics · 02/04/2010

...=T If T increases

**and**P remains the same, then V has...remain constant. The same goes for P, if the**pressure**increases, the T has to increase. 1...2 Answers · Science & Mathematics · 25/01/2010

STD stands for

**Standard Temperature and Pressure Standard Temperature**is typically 60 deg F**Standard**...3 Answers · Science & Mathematics · 09/02/2012

.... Using the "

**Standard**Atmosphere Calculator...source, I get @20,600 m**Temperature**- 217.250 K**Pressure**- 4981.29 Pa Density...1 Answers · Science & Mathematics · 08/11/2013

...common standard is 20 °C (293.15 K, 68 °F) STP ( Standard Pressure and Temperature ), from wikipedia: In chemistry, standard condition for temperature and pressure (informally...

1 Answers · Science & Mathematics · 02/01/2011

... the "

**pressure**" & "**temperature**" of air as being "normal"... was thinking atmospheric**pressure**(1.01325 bar)**and**the int'l**standard**"room" temp. @ 25 *Celsius...2 Answers · Science & Mathematics · 23/05/2012