If you wanted to prepare a 1:10,000 dilution of your sample and cannot measure out quantities of less than 1 mL, and have dilution blanks that can hold only 10 mL, how many dilution blanks will you need?

a. 2
b. 3
c. 4
d. 5

4.

Explanation:

The dilution process may be defined as the increasing of the solute concentration by mixing it with water or any other soluble reagents. The dilution is important to detect the bacterial growth.

The four blank is required to make the dilution of 1:10,000. The first blank contains 10⁰ or 1 ml and takes out 10 ml and 90 ml will remain in dilution. This results in 1: 10 ml dilution. Then further subsequent dilution from the second blank results 1:100 ml and tbird dilution contains blanks with 1:100 dilution. The fourth blanks dilution results in 1: 10,000.

Thus, the correct answer is option (c).

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

about 40,000,000 results (0.81 seconds)  

search results

what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.