Is 70 percent ethanol the same with 70 percent ethanol?
Absolutely, recent painstaking scientific research has showed that 70% ethanol is the same as 70% ethanol.
to save the ethanol
bcz, 100% ethanol is more volatile when compared to 70% ethanol.... so that, the acting time of 70% ethanol is more and also 100% ethanol acts only on surface proteins whereas 70% ethanol acts on internal proteins.
70% ethanol has been shown to have the highest killing ability of microbes. Also, 100% ethanol is toxic to the user
The density of 70% ethanol allows RNA settlement or say sedimentation in the vial.
70% is the most effective concentration to denature poteins so killing bacteria. At 95% the ethanol just evaporates and leaves the protein untouched. Below 70% does not denature proteins. It also makes the ethanol less flammable.
DNA is insoluble in ethanol, therefore it can be extracted afterwards
150 ml ethanol to 350 ml distilled water
There's a dilutionfactor of 70/96=0.729, when you make 1 liter, you have to use 729 milliliters of ethanol, then you to add water till 1 liter total.
Why is 70 percent ethanol or any diluted alcohol for that matter better at penetrating cell membranes than undiluted alcohols?
70 percent ethanol means it has 30 percent of water.so due to natural osmosis water can enter thr cell membrane.the ethanol thus moves inside along with water and hence has a beter penetrating power than undiluted ethanol.
we can also use 100% ethanol or pure ethanol but as it has been tested that 70% is sufficient to kill all the cells and spores of microbes so use this
Ethanol is a dehydrating agent that is able to precipitate DNA during the isolation process
If I understand you correctly, we are trying to find the volume of 70% of 1600 ml of ethanol. That said: here is how you do it: 1. Change 70% into a decimal. You do this by moving the decimal point two places to the right. This would turn 70 into .70 2. Multiply .70 x 1600. 3. The answer is: 1120mL.
Ethanol creates pores in the cell membrane of the microbial cell by solubilizing the lipoproteins of the membrane. The activity of ethanol determines its concentration. If we 90 percent ethanol, the amount of ethanol molecules available to act upon the cell is more and it attacks the cell membrane from all sides. The dissolved lipoprotein forms a kind of layer around the cell, due to which the alcohol is unable to act further and cause… Read More
737 ml 95% EtOH + 263 ml d H2O
To prepare 100ml of 70% Ethanol, measure 70ml of 95% ethyl alcohol in a graduated cylinder and add 30ml of distilled water. To prepare 100ml of 70% Ethanol, measure 70ml of 95% ethyl alcohol in a graduated cylinder and add 30ml of distilled water.
What volume of ethanol 96 percent should be added to 500 ml of 70 percent ethanol such that when the mix is made to 2.5l with water the final conc of ethanol is 55 percent?
First calculate how much ethanol you need in the final solution. 55% X 2.5l = 1.375l Then calculate how much ethanol you already have in the solution. 0.5l X 70% = 0.35l Now take the difference between those two numbers as the extra amount needed. 1.375l - 0.35l = 1.025l Now correct for the fact that you are adding only 96% ethanol. 1.025l / 96% = 1.068l Answer: 1.068l
Disinfectants are usually mostly alcohol, Ethanol to be exact. Ethanol can only reach a purity degree of 95-96 percent in liquid form, with purer solutions existing only as a gas. 70 percent alcohol is sufficient to kill the bacteria, and a higher purity would not have any beneficial effect.
due to its better penetration , there is less chance of dna disruption
7 gram elemental iodine and 93 gram 'ethanol in water' mixture (70% - 96%)
88.6% is the same as 0.886 and 0.886*70 = 62.02
Add 10 parts water to 90 parts 100% ethanol.
Finding 47 percent of a number is the same as multiplying the number by 0.47. In this instance, 0.47 x 70 = 32.9. Therefore, 47 percent of 70 is equal to 32.9.
What are the mole fraction and molality of ethanol -C2H5OH in an aqueous solution that is 45.0 percent ethanol by volume-The density of water is 1.00g per mL and that of ethanol is 0.789 grams per mL?
The mole fraction and molality of ethanol -C2H5OH in an aqueous solution that is 45.0 percent ethanol by volume and the density of water is 1.00g per mL that of ethanol is 0.789 grams per mL and 70/18. A mole fraction in chemistry is the amount that is divided by the total amount of all constituents.
No, they're the same.
70 percent of a number is 210 so the number is 210*100/70 = 300 Then 25% of this number is 300*25/100 = 75
What is the percent for married couples to stay married for 70 years?
Finding 8.5 percent of a number is the same as multiplying the number by 0.085. In this instance, 70 x 0.085 = 5.95.
Because 70% is the same as 0.70 and 0.70*60 = 42
Ethanol is totally burned.
14/20 is the same as 7/10=70/100= 70%
Subtracting 70 percent from a number is the same as multiplying it by (1 - 0.7) = 0.3. Therefore, 70 percent off 27.50 is equal to 8.25. Don't forget to include the currency unit if the question is about money.
Ethanol precipitates the DNA
44 percent percent of 70 = 0.0044 x 70 = 0.308
So as not to 'waste' too much ethanol. To use 95 % ethanol allows some ethanol to be saved!
35 percent of 70 percent = 0.245
It is made from absolute ethanol. Use M1V1 =M2V2.
49 is 70% of 70 .
Yes because 70 percent is 70/100 which is .70
It is prepared by taking five volume of ethanol and dissolve in 100 ml of water .
70 percent of 83 percent is 0.581 or 58.1%
How many gallons of gasoline that is eight percent ethanol must be added to two thousand gallons of gas with no ethanol to get a mix that is four percent ethanol?
NO AFENCE, BUT THAT IS AN IMPOSIPLE QUESTION TO ANSWER. MAYBE SOMEONE WILL ANSWER THAT FOR YOU. GOOD LUCK!
30 ml of ethanol to 70ml of distilled water.
49/70 x 100 = 70 percent.
Ten percent of 70 is 7. 9 times ten percent of 70 (7) is 63. So 90 percent of 70 is 63.
If you submerge bed bugs in 70% ETOH solution, it will kill them. However, if you just apply it to a surface, and expect it to kill bed bugs that crawl over it, that won't work. The ethanol will evaporate quickly, and once it's dry, it's not effective in killing much, although it might do an okay job repelling bed bugs for a little while, but ethanol isn't a safe chemical to expose humans to.
70% is 70 over 100 (70/100). That's the same as seven over ten (7/10). We usually say seven-tenths.
40% of 70 = 40% * 70 = 0.4 * 70 = 28
2 percent of 70 =1.4 2% of 70 = 2% * 70 = 0.02 * 70 = 1.4
25 percent of 70 = 17.5 25% of 70 = 25% * 70 = 0.25 * 70 = 17.5
49 divided by 70% is 70. 49 is 70 percent of 70 students.