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turn 0 C to 273 K , 30 C to 303K then 255*85/303=101.3*V/273 V=193mL

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Which metal has a very low melting point?

Mercury -39C Gallium 30C


What volume is occupied by 20. 0 g of nitrogen (N2) gas at 30 degree C. and 800 mmHg?

1 mol N2 = 28g 30C = 303K At STP, 1mol * 273K is proportional 24L * 760torr. (PV = nRT) Then we do a little bit of stoichiometry... 10g * 1mol/28g * 24L*760torr/(1mol*273K) * 303K * xL/750torr = 9.6402 L 10.0g of N2 at 30C and 750torr should occupy 9.6402L


How many seconds does it take for sound to arrive at the back of a big auditorium if the temperature in the room is 30C and the stage is a distance 33.1 away?

The speed of sound in air at 30C is approximately 349 m/s. To calculate the time it takes for sound to travel 33.1 m, you divide the distance by the speed of sound: 33.1 m / 349 m/s ≈ 0.095 seconds.


Does density change if some of the liquid evaporates between the time the liquid is delivered to the beaker and to the time it was measured?

Whether or not the density changes if some of the liquid evaporates between the time the liquid is delivered to the beaker and the time it is measured depends on the liquid. For almost all liquids, the answer is no because there was not enough time. Water will have a density of approximately 1 and if a small amount evaporates, it will still have the same density. If you had the beaker at 100C and the room at 0C and waited until the water was 4C, it would make a difference. If the water was at 40C and the room was at 30C, it would almost make no difference. A very few substances would undergo tremendous cooling. That would bring a corresponding increase in density.


What does 30C mean in Fahrenheit?

86 °FTo convert from °C to °F you use the formula °F = (9/5)x(°C) +32That means 30 °C converts to:9x30/5 + 32 = 9x6 +32 = 54 +32 = 86 °F