Molar mass KCl = 74.55 g/mol
Volume = 869 mL in liters : 869 / 1000 => 0.869 L
number of moles:
21.9 / 74.55 => 0.293 moles
M = n / V
M = 0.293 / 0.869
M = 0.337 mol/L⁻¹
hope this helps!
Answer:
The volume is 8,0 L.
Explanation:
We apply Boyle Mariotte's Law: for a given mass of gas at constant temperature, its pressure and volume vary inversely proportionally (the higher the pressure, the lower the volume and vice versa):
P1 x V1 = P2 xV2
V2 = (P1 x V1)/P2
V2 = ( 0,80 atm x 4,0 L)/ 0,40 atm
<em>V2= 8,0 L</em>
Tin is an element called Stannum and has the symbol Sn. Molar mass is the mass of 1 mol of a compound, 1 mol of any substance is made of 6.022 x 10²³ units, these units could be atoms making up an element or molecules making up a compound.
While the number of atoms making up 1 mol is the same for any element, the weight of 1 mol of substance varies from one another.
In tin(Sn) molar mass - 118.71 g/mol
In 118.71 g - there's 1 mol of tin
therefore in 37.6 g of tin - 1 x 37.6 / 118.71 = 0.31 mol
In 37.6 g of tin, there's 0.31 mol
Answer:
The answer is
<h2>686.01 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume of zinc = 96.08 cm³
density = 7.14 g/cm³
The mass is
mass = 96.08 × 7.14 = 686.0112
We have the final answer as
<h3>686.01 g</h3>
Hope this helps you