Answer:
V = 63.57 mL
Explanation:
In this case, to get the mL of the stock nitric acid we need to know first the concentration in mol/L so it can match the units of the desired concentration, in this case, 0.5 mol/L
To get the concentration of the stock solution, we should use the following expression:
M = % * d * 1000 / MM * 100
The molar mass of the nitric acid (HNO₃) is:
MM = 1 + 14 + 3(16) = 63 g/mol
the concentration of the acid is:
M = 70.3 * 1.41 * 1000 / 63 * 100
M = 15.73 M
Now that we know the concentration of the solution, we use the following expression to get the volume:
M1*V1 = M2*V2
Replacing the values and solving for V1 we have:
V1 = M2*V2 / M1
V1 = 2 * 0.5 / 15.73
V1 = 0.06357 L
In mL it will be:
V1 = 0.06357 * 1000 = 63.57 mL
The balanced equation for the above reaction is as follows;
2H₂ + O₂ --> 2H₂O
stoichiometry of O₂ to H₂O is 1:2
number of O₂ moles reacted - 40.3 g / 32 g/mol = 1.26 mol
according to molar ratio
number of water moles produced = 2 x number of O₂ moles reacted
number of water moles formed - 1.26 x 2 = 2.52 mol
mass of water produced = 2.52 mol x 18 g/mol = 45.4 g
45.4 g of water produced
Answer:
Explanation:
Given
Initial Form: Onyx
Final Form: Rectangular Solid
Dimension of Solid = 5.10 cm by 5.10 cm by 2.50 mm
Required
Volume of the solid (in cm³)
The volume of a solid is calculated as thus;
Assume the following;
The first thing to do is to convert the assumed height from mm to cm
Given that;
This implies that
Hence, the dimension of the solid in cm is:
The Volume is then calculated as;
Hence, the volume of the rectangular solid is