Sodium oxide: \(Na_2O\)

Copper (II) oxide: \(CuO\)

Sulfur trioxide: \(SO_3\)

dinitrogen penta oxide: \(N_2O_5\)

diphosphore trioxide: \(P_2O_3\)

61/ ____ unemployed, Jessica is having a hard time making ends meet.

a To be

b Being

c Is

d Be

62/ Workers are expected to wear newly ____ protective clothing.

a purchase

b purchasing

c purchased

d purchases

63/ After hearing about the increase in the minimum wage, Brown, Inc. laid off 30 ____ of its entire workforce.

a percent

b pers

c percents

d per