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10ml of ethanol mix with 40ml of water find percent concentration of ethanol solution?

The total volume of the solution is 10ml + 40ml = 50ml. The percentage concentration of ethanol in the solution is (10ml / 50ml) * 100% = 20%.


How much heat (calories) must be applied to a 10ml beaker filled with boiling water in order to vaporrize the water?

I guess none. Why? The given is that the water is boiling -- it is turning into vapor.


Was the water in a cylinder before the sample was added?

after 5.63 gm sample of wood metal was added in a 10ml graduated cylinder the new water level is 8.7ml "http://wiki.answers.com/Q/Was_the_water_in_a_cylinder_before_the_sample_was_added" after 5.63 gm sample of wood metal was added in a 10ml graduated cylinder the new water level is 8.7ml "http://wiki.answers.com/Q/Was_the_water_in_a_cylinder_before_the_sample_was_added"


Preparation of 100ml 0.5N from a stoke solution of 5.0N HCL?

To prepare 100ml of 0.5N HCl solution from a stock solution of 5.0N HCl, you need to dilute the stock solution with water. To calculate the volume of stock solution needed, you can use the formula C1V1 = C2V2, where C1 is the concentration of the stock solution, V1 is the volume of the stock solution needed, C2 is the desired concentration, and V2 is the final volume of the diluted solution. So, V1 = (C2 * V2) / C1 = (0.5 * 100) / 5 = 10ml of the stock solution. Dilute this 10ml of stock solution to 100ml with water.


How much does a 10ml graduated cylinder filled with water weigh?

Depends on the weight of the glass. The water weighs 10 grams if filled to the 10 ml mark - more if overfilled, of course.