1.) HCl(aq) + NaOH(aq) > H2O(l) + NaCl(s) determine the oxidation numbers for each element.

Idon’t understand this page, can someone ?

How does concentration affect reaction rate

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?