A sample of magnesium sulfate is placed in a beaker. Water is added and the mixture is stirred, creating a solution. Which substance is the solute, and which is the solvent? A) Magnesium sulfate is the solute; water is the solvent. B Magnesium sulfate is the solvent; water is the solute. (C) Both magnesium sulfate and water are solutes. (D) Both magnesium sulfate and water are solvents.

32 Antara gas berikut, yang manakah mengandungi 1.2 mol atom pada keadaan bilik? [ 1 mol gas menempati \( 24 \mathrm{dm}^{3} \) pada keadan bilik] Which of the following gases contains 1.2 mol of atoms at room conditions? [1 mol of gas occupies \( 24 \mathrm{dm}^{3} \) at room conditions] A \( 14.4 \mathrm{dm}^{3} \) gas karbon dioksida B \( 14.4 \mathrm{dm}^{3} \) carbon dioxide gas B \( 14.4 \mathrm{dm}^{3} \) gas nitrogen C \( 14.4 \mathrm{dm}^{3} \) nitrogengas \( 14.4 \mathrm{dm}^{3} \) gas metana \( 14.4 \mathrm{dm}^{3} \) methane gas D \( 14.4 \mathrm{dm}^{3} \) gas argon \( 14.4 \mathrm{dm}^{3} \) argongas

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 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.

3. Un mol de un gas ideal se expande reversiblemente a partir de una presión inicial de 10.0 atm hasta una presión final de 0.4 atm, manteniéndose la tempera-tura constante en 273 K, determine:a) El cambio en la energía interna del gas.b) El trabajo hecho por el gas al expandirse.c) El calor transferido durante el proceso *

1. C7 Hile ( 9 isomers)