Suppose that you have a 60.0% solution of naoh. how many milliliters of water must be added to 30.0 ml of this solution to prepare a 35.0% solution of naoh? 15.5 ml21.4 ml51.4 ml72.8 mlcan’t determine the concentration because you need the density of the solution

Explanation:

1) Data:

a) C₁ = 60.0% (initial solution)

b) V₁ = 30.0 ml (initial solution)

c) C₂ = 0% (pure water)

d) V₂ = ? (pure water)

e) C₃ = 35.0% (final concentration)

2) Formula:

3) Solution:

a) Substitute values in the first formula:

b) Solve the equation (units are supressed just to manipulate the terms)

the answer is   c.) 1575 j.

explanation:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.