I have 100mls of an antibiotic stock solution at a concentration of 6mg/ml. I would like a final volume of 10mls of the antibiotic at a concentration of 1.5mg/ml. How much of thestock solution do I need to obtain this?

The only problems that need to be done are numbers (3) and (4) on the second scanned document andthe question below . Numbers (1), (2), (5) are finished problems that do not need to be done so problems (3) and (4) should be done using the same format (do Calculations and preparation)as those.
Also please answer this ques

A 5.0 mL aliquot of a stock tryptophan solution was diluted by adding 95 mL of water. The absorbance of that diluted solution was measured at 280 nm as 0.055 absorbance units. What is theconcentration of thestock (original) solution? Hint: Make sure to calculate the dilution factor. (Molar extinction coefficient = 5579 cm-1 M-

Calculate theconcentration of ions in the following saturated solutions.
[Al3+] in Al(OH)3 solution with [OH -] = 2.6 10-9 M
I have tried: 1.3e-30, 2.3e-25, 6.9e-25, and 8.7e-10... im stuck and i cant figure out the correct solution.

The molar concentration of H+ ions in a solution is 5.8 × 10-9. The pH of the solution is
a. 9.00 c. between 8.00 and 9.00
b. 5.80 d. between 9.00 and 10.00
A solution for which [OH-] = 3.0 × 10-10 is classified as
a. acidic c. neutral
b. basic d. more than one response is correct
10. A solution has a pH of 11.60. Th

A lime-soda softening plant treats a flow of 150 MGD, andthe water has 86mg/l Ca2+, 35 mg/L Mg2+, 299 mg/L HCO3- and 6mg/l CO2. The commercial grade of quicklime has a purity of 85% andthe soda ash has a purity of 95%. Determine:
a. The pounds of quicklime and soda ash required per million gallons
b. The tons of quicklime an

1. You are given 410.0 mL of a 1.581 M K2CO3 solution. There are ______ moles of
K
+
present in the solution.
2. You are given 83.5 mL of a 2.101 M solution of AgNO3. If all of the water is
allowed to evaporate, then the mass of AgNO3 left in the container is ______ g.
3. If 25.0 mL of a 4.525 M solution of HCl was poure

I need help with this problem.
R1 is configured with the following interfaces in OSPF area 0.
Int s0=198.17.16.10/24, Int lo 100= 1.1.1.1/24, int lo 10=200.200.200.200/24 , int S1=210.210.210.210/24. Which of the above addresses will be chosen as OSPF router ID. Note. OSPF router ID is no manually configured.

Calculate the concentration of ions in the following solutions
(a) [I] in AgI in AgI solution with [Ag+] = 9.6E-9 M Ksp=8.3E-17
(b) [Al3+] in Al(OH)3 solution with [OH-] = 3.8E-9 M Ksp=1.8E-25
I got the first one and it is correct:
AgI-------------->Ag + I
I