To prepare a 10 ml of a 25 M HCl solution, you would need to dilute the 1 M HCl solution by a factor of 25. You will need 0.25 ml of the 1 M HCl solution and 9.75 ml of solvent (usually water) to make a total volume of 10 ml for the 25 M HCl solution.
nothing it depends on what factor was removed
The primary determing factor would be the size of the substance
To convert 25 inches to meters, you can use the conversion factor of 1 inch being approximately equal to 0.0254 meters. Therefore, 25 inches is equal to 25 * 0.0254 = 0.635 meters.
Amps = Watts / (Volts x Power Factor). Now a hair dryer has a motor and a resistive heater so if we assume a PF = .8 the answer is: 1500 / 20 = 75 amps. Since it is unlikely that you have a 75 amp hair dryer you must mean 125 volts. The answer for that would be 1500 / 100 = 15 amps which is still high, but believable. If we assume a Power Factor of 1 and ignore the motor contribution to Power Factor we have 1500 / 125 = 12 amps.
4a2+ 25 does not factor over the real number field. In the complex numbers , it factors as (2a +5i)(2a - 5i). This is because i2 = -1, so 4a2 + 25 = 4a2 - (- 25) = 4a2 - 25(-1) = 4a2 - 25i2
(2a + 1)(2a - 5)
2a
(4a - 1)(a - 4)
(2a + 10)(2a - 12)
Assuming the missing signs are pluses, that factors to (4a + 3)(a + 3)
4a2
4a2 + 4ab - y2 + b2 You cannot simplify this expression because it does not contain like terms, but you can factor it such as: 4a2 + 4ab - y2 + b2 = (4a2 + 4ab + b2) - y2 = (2a + b)2 - y2 = [(2a + b) - y][(2a + b) + y]
(2a + c)(4a2 - 2ac + c2)
4(4a2 - b2) 4(2a + b)(2a - b)
12a4 + 16a64a4(3 + 4a2)=========
That factors to 4(a - b)(a + 3b)