Add 10 parts water to 90 parts 100% ethanol.
a) 70% ethanol has been found to b most effective in killing microbes.Higher or lower concentrations may not b as effective. b) if u use 90% or absolute ethanol, it will evaporate fast and may not be much effective. c) using higher concentrations will leave its traces on the applied surfaces d) higher concentrations of ethanol are harmful to skin and makes it dry pretty a) 70% ethanol is most effective.higher or lower ones r not as effective b) it evaporates at a slow rate than 90% or absolute ethanol. therefore it is more effective and saves ur ethanol too.. c) higher concentrations alwez leave traces applied surfaces thus addind an unwanted reagent d) 70% ethanol is comparatively less harmful to ur hands.. higher concentrations makes ur skin dry..
Ethylene glycol and hexane is not a homogeneous mixture. This is because hexane cannot interact with ethylene glycol due to lack of dipoles.
phytoplankton :)
It is true 90 percent of water covers the earth.
90%
5.75 lbs
It is: 90%
why? well.. first of all u must comlete the mixtur blah blah blah go to collage !
Percent means out of 100: → 90% = 90/100 = 90 ÷ 100 = 0.9
90 percent of 100 is 90
no 9 percent 90 over 100 is 90%
90 percent out of 100 percent = 9/10 or 0.990%/100% = 9/10 or 0.9
90/100 = 90%
100 percent is 725.59 90 percent is 653.031
90 percent of 31.5 is 28.35 31.5 x 90/100 =2835/100 = 28.35
90% = 90/100 or 9/10 in fraction
190 100 x 0.90 = 90 100 + 90 = 190