Answer:
d) 44 g/mol
Explanation:
If we can consider that this gas behaves like an ideal gas, then we can use the following formula:
PV=nRT
P=pressure
V=volume
n=N° of moles
R= gas constant, it has multiple units, for this case, we will use 62.36 mmHg*Lt/mol*K
Then, the number of moles can also be noted as:
n=m/M , where m=mass and M=molar gas so: PV=(m/M)RT
M=(mRT)/(PV)
And we have the rest of the values for this case:
T=0°=273°K
V=1Lt
P=238 mmHg
m=0.614 g
If we finally put all these values in our formula, we can get the molar mass for this gas:
M=(0.614x62.36X273)/(273x1) gxmmHgxLtx°K/molx°K/(mmHgxLt)
M= 44 g/mol
Given by the name of these compounds, they are formed if one or more hydrogen atoms are substituted for halogens
X = Cl, Br, I, F
Answer:
El gas se calentó a 35°C
Explanation:
Para resolver este problema es necesario aplicar la Ley de Gay Lussac donde en una situación en la que un gas no modifica su volumen, su temperatura será directamente proporcional a la presión.
Podemos pensar que se describe desde la Ley de Gases Ideales donde:
P . V = n . R . T
para la situacion 1
y P . V = n . R . T para la situacion 2
Como V, n y R son constantes:
P₁ / T₁ = P₂ / T₂
250000 Pa / 25°C = 350000 Pa / T₂
T₂ = 350000 Pa . 25°C / 250000 Pa → 35°C
Answer: Heat energy is the transfer of<u> thermal energy.</u>
Explanation:
Generally speaking only certain molecules will dissolve in water to begin with. The old phrase "like dissolves like" or "birds of a feather flock together" is very true with respect to what degree solutes are soluble or miscible in different solvents. At very low concentrations, almost all molecules are somewhat soluble in all solvents. But by trend, ionic and polar solutes are more soluble in polar solvents and non-polar molecules are soluble in non-polar (mostly organic) solvents. The units of concentration we just discussed are used to describe the degree to which a solute is soluble in a solvent.
When you place a non-polar molecule in a polar solvent (like oil in water) the molecules try to minimize surface contact between them. (like you and a guy with a cold on an elevator). This is actually the basis for the cells in our bodies. The lipids (oily fatty acids) form our cell membranes so that their non-polar tails face inward away from the polar cytoplasm and the polar heads face towards the polar cytoplasm.