What is the mass, in pounds, of 389 ml of a gas that has a density of 1.29 g/l?

Mass of gas is 0.001 pounds.

Explanation:

Density is defined as the mass contained per unit volume.

Given : Mass of gas = ?

Density of gas =

Volume of gas = 389 ml = 0.389 L     (1L=1000ml)

Putting in the values we get:

      (1g =0.002 lb)

Thus the mass of gas is 0.001 pounds.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.