Compatibility summary
You will need a travel adapter in Mozambique; plug types used there differ from Singapore.
Plug comparison
Singapore plug types: G
Mozambique plug types: C F M N
There is no common plug type between Singapore (G) and Mozambique (C F M N). You need a travel adapter.
Voltage comparison
Singapore: 230V, 50Hz
Mozambique: 230V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.