how many g/ml are there in 1M?

The question is NUTS. You are asking for the density of a 1M solution. The density of any solution of one mole solute per liter depends on the mass of the mole of solute. Normally, in dilute solutions, the density will be very near 1g/ml + . For instance, the density of a 1M NaCl solution (5.8percent), is 1.041g/ml