425 ml of neon gas at -12°c and 788 mmhg
expands into a 2.40 l container while the
pressure decreases to 577 mmhg. what is the
temperature of the gas in °c?

806.23 °C

The question requires we calculate the new temperature of the gas in °C.

We are given;

When doing questions on gas law, we always use temperature in Kelvin.

K = °C + 273

Therefore, Initial temperature, T₁ =261 K

To calculate the new temperature, we are going to use the combined gas equation.

T₂ = P₂V₂T₁ /P₁V₁

Therefore;

T₂ = (577 mmHg × 2.4 L × 261 K) ÷ (788 mmHg × 0.425 L)

    = 1079.226 K

    = 1079.23 K

But, °C = K - 273

            = 1079.23 K - 273

Therefore, T₂ = 806.23 °C

Therefore, the new temperature is 806.23°C

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.