Who serves as the presiding officer of the Senate?

The
of the United States serves as the presiding officer of the Senate.
At present,
is the president of the Senate.

The molar mass and molecular weight of LiNO3 is 68.946.
Answer:
a business who buys goods and services
Answer:
the law of conservation of mass and the law of constant compositionthe law of conservation of mass and the law of constant composition