How many chromosomes are in the human liver cell?

Any somatic cells in a diploid eukaryotic organism will have the diploid number (2n) of chromosomes. For humans that number is 46.

To unpack that: humans are diploid organisms. That is, our cells contain two copies of every chromosome we have. One copy is inherited from our mothers, the other from our fathers. Because we have 23 pairs of chromosomes (n=23), the total number of chromosomes in a human cell is 46 (2n=46). For the most part it doesn't matter what kind of cell you're talking about in a human body - brain cell, fat cell, liver cell (more technically called hepatocytes) - they will all have the same 46 chromosomes in them. All cells in your body are genetically identical - they differ in which genes are turned on, not by which genes they possess.

(N.B.: There are a few exceptions to this, notably red blood cells and germ line cells. Mature red blood cells have no nuclei and no chromosomes at all! And germ line cells - that is sperm, eggs, and their precursors - will have only 23 chromosomes. This permits a sperm cell with 23 chromsomes and an egg cell with 23 chromosomes to fuse to produce a proper human zygote with 46 chromosomes.)