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X<7.5 convert x interval to standard z units? U-235, an alpha emitter with a half-life of 703 million years.
How long amount of U-235 to reach 1/2 of its initial amount? 0.5 L of 0.2 M NaCl was mixed with 0.5 L of 0.2 M AgNO3. What is the molar mass of the ppt? Mostre que o angulo que o ponteiro das horas descreve, em graus, é a metade do numero que marca os minutos.? Tan θ =24/7, θ lies on quadrant iii find sin 2θ?