What is the pH of 100 mL100 mL of a buffer that is 0.5 M HCNO0.5 M HCNO and 0.5 M CNO−0.5 M CNO− when 100 mL100 mL of a 0.2 M NaOH0.2 M NaOH solution is added? Assume the volumes are additive. KaKa of HCNOHCNO is 3.5 × 10−43.5 × 10−4 .

Describe the interaction that occurs between two objects with the same electrical charge.

What is the independent variable in this investigation? mass volume sample number substance density

Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.