Un estudiante toma 200 mL de una disolución acuosa de HCl 2.0 M y le agrega agua
destilada hasta tener 500.0 mL de disolución. Calcular la nueva concentración molar.

Calculate the number of moles of ethane in 100 grams

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.