The density of a block is 0.86g/ml and has a volume of 2ml. what is the mass of the block?

To find the mass of the block, you can use the formula for density, which is mass divided by volume. In this case, you know the density (0.86g/ml) and the volume (2ml), and you need to find the mass.

Here are the steps to solve the problem:

1. Rearrange the density formula to solve for mass. The formula becomes: mass = density * volume.
2. Substitute the given values into the formula. So, mass = 0.86g/ml * 2ml.
3. Multiply 0.86g/ml by 2ml to get the mass. The ml units cancel out, leaving you with the mass in grams.

So, the mass of the block is 1.72 grams.