Answer:
The density is 0, 61 g/cm3
Explanation:
We calculate the density:
Density= mass/volume = 3,8 g/6, 28 cm3 = 0, 61 g/cm3
The molal concentration of the solution is 0.67 mol/kg.
The formula for molal concentration (<em>b</em>) is
<em>b</em> = moles of solute/kilograms of solvent.
Moles of solute = 8.0 g × (1 mol/24 g) = 0.333 mol
b = 0.333 mol/0.50 kg = 0.67 mol/kg
Answer:
2 L
Explanation:
From the question
Applying boyles law,
PV = P'V'....................... Equation 1
Where P = Initial pressure, P' = Final Pressure, V = Initial Volume, V' = Final Volume.
make V' the subject of the equation
V' = PV/P'.................... Equation 2
Givne: V = 5 L, P = 500 mmHg, P' = 1240 mmHg
Substitute these values into equation 2
V' = (5×500)/1240
V' = 2500/1240
V' = 2 L
Which list of elements contains a metal, a metalloid, and a nonmetal?(1) Zn, Ga, Ge (3) Cd, Sb, I(2) Si, Ge, Sn (4) F, Cl, Br
Sladkaya [172]
3) Cd . Sb . I
<span>look at the periodic chart- if the element is on the right it is a nonmetal, if it is on the left its a metal, and if it is in between it is a metalloid</span>