Boiling liquids that want to escape gas
Answer:
26.25 mL
Explanation:
This is a dilution problem. First, let us calculate the volume of final solution needed:
The dog weighs 50 pounds and the sedative is administered at 0/7 ml per pound. Hence:
50 x 0.7 = 35 mL
A total volume of 35 mL, 2.5% solution of the sedative will be needed.
But 10% solution is available. There needs to be a dilution with saline water, but what volume of the 10% solution would be diluted?
initial volume = ?
final volume = 35 mL
initial concentration = 10%
final concentration = 2.5%
Using dilution equation:
initial concentration x initial volume = final concentration x final volume
initial volume =
= 2.5 x 35/10 = 8.75 mL
Hence, 8.75 mL of the 10% pre-mixed sedative will be required.
But 35 mL is needed? The 8.75 mL is marked up to 35 mL with saline water.
35 - 8.75 = 26.25 mL
<em>Therefore, 26.25 mL of saline water will be added to 8.75 mL of the 10% pre-mixed sedative to give 2.5%, 35 mL needed for the dog.</em>
2.34E25 aka 25 0's behind the decimal
Answer:
the theoretical value for the number of moles of is 0.0173 moles
Explanation:
The balanced chemical equation for the reaction is represented by:
From above equation; we would realize that 3 moles of reacts with to produce 3 moles of
However ; the molar mass of = 84 g/mol
mass given for = 1.45 g
therefore , we can calculate the number of moles of by using the expression :
number of moles of =
number of moles of =
number of moles of = 0.0173 mole
Since the ratio of to is 1:1; that implies that number of moles of is equal to number of moles of produced.
number of moles of =
0.0173 =
mass of = 0.0173 × 44
mass of = 0.7612 g
Thus; the theoretical value for the number of moles of is 0.0173 moles