BEIRUT, Lebanon — Lebanon announced the formation of a new cabinet on Tuesday, breaking a monthslong deadlock with the nomination of 20 new government ministers who will have to address a perplexing mix of political and economic crises.

The government is deep in debt, the currency has lost much of its value on the black market and protesters have taken to the streets for more than three months to condemn the country’s political class for years of corruption and mismanagement.

It remained unclear whether the new cabinet, which still must be confirmed by the Parliament, could take swift action to prevent an economic collapse or to appease the protesters. In addition, the new government’s support from Hezbollah, the Shiite Muslim militant movement that the United States considers a terrorist organization, could dissuade Western and Persian Gulf nations from coming to Lebanon’s aid.

Hassan Diab, an engineering professor and former education minister who was designated prime minister last month, told reporters Tuesday that his new cabinet met the needs of the country’s “exceptional situation” and that it would seek to recover stolen funds and fight unemployment.