A technician has been given 250 ml's of 15% acetic acid solution. The pharmacist has asked the tech to dilute the solution to 500 ml's with sterile water and to label the solution. What percentage should appear on the label

astronomers such as edwin hubble.

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.