A sample of an unknown compound is vaporized at . The gas produced has a volume of at a pressure of

Explanation:

Given:

T = 190 °C

= 190 + 273

= 463 K

V = 2420 ml

= 2.42 l = 0.00242 m^3

P = 1 atm

= 1.01325 × 10^5 N/m^2

M = 2.04 g

Using ideal gas law,

P × V = n × R × T

Number of moles, n = (1.01325 × 10^5 × 0.00242) ÷ 8.314 × 463

= 0.0637 mole

Molar mass = mass/no of moles

= 2.04/ 0.0637

= 32.025 g/mol

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

1/0.14nm = 10^10/1.4 a lot