10. Cuando se intenta nombrar un compuesto se debe tener en cuenta los estados de oxidación de los elementos y que estos por regla al sumarlos deben dar cero. Con base en esto, el estado de oxidación del Cr en el compuesto \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) es: \( \begin{array}{ll}\text { A. }+1 & \text { C. }+7 \\ \text { B. }-6 & \text { D. }+6\end{array} \)

Chemical agents cause all of the * 10 points following except pustules nicotine stomatitis aspirin burn

The half-life of Radium- 226 is 1590 years. If a sample contains 500 mg , how many mg will remain after 3000 years?

The half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium- 100 has been reduced to a mass of 6 mg . What was the initial mass (in mg ) of the sample? What is the mass (in mg ) 6 weeks after the start? You may enter the exact value or round to 4 decimal places.

The half-life of Radium- 226 is 1590 years. If a sample contains 500 mg , how many mg will remain after 3000 years? Give your answer accurate to at least 2 decimal places.

1. C7 Hile ( 9 isomers)