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I think I am Jewish. Is there any way I can obtain DNA test of my relatives living in Sweden or the USA online? How to go safe mode in letv 1s? At 25°C a solution has a hydroxide-ion concentration of 3× 10–5 M. What is its hydronium-ion concentration? How many milligrams of a 24 mg sample of cesium-137 remain after 120 years? Let θ be an acute angle of a right triangle for which sin θ = 12
13
. Find cos θ.?