Answer:
$99.99
Explanation:
Given parameters:
Cost of gold per ounce = $323.12
weight of gold in the lab = 8.7739g
Solution
We need to first convert the mass of the weighed gold into ounces from grams:
1 gram = 0.03527oz
8.7739g = 8.7739 x 0.03527; 0.31oz
Since 1oz of gold is $323.12
0.31oz of gold will be 0.31 x 323.12 = $99.99
Answer:
Explanation:
Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.
The total volume of the infusion in 10 mL (bupivacaine) + 10 mL (morphine) + 250 mL (saline solution) = 270 mL.
The number of drops is: (270 mL)*(20 drops/mL) = 5400 drops
If this is to be administered over 3 hours, or over 180 minutes, then the number of drops per minute is:
5400 drops / 180 minutes = 30 drops/minute
The balanced equation for the above reaction is as follows;
Mg + 2HCl ---> MgCl₂ + H₂
stoichiometry of HCl to MgCl₂ is 2:1
we have been told that Mg is in excess therefore HCl is the limiting reactant
number of HCl moles reacted - 0.100 mol/L x 0.0256 L = 0.00256 mol
according to molar ratio, number of MgCl₂ moles formed - 0.00256/2
Therefore number of MgCl₂ moles formed - 0.00128 mol
mass of MgCl formed - 0.00128 mol x 95.20 g/mol = 0.122 g