density of sand =3.00g/cm3?

The density of sand depends on how wet it is, so does the question says how wet is the sand?

Indeed, density of sand (and other soil related materials) depends on the moisture content.

For dry sand, it is approximately 1.6 g/mL.

Ref:
http://www.rfcafe.com/references/general/density-building-materials.htm

I don't see a question here.

To determine the density of sand, you need to divide its mass by its volume. In this case, the given information is that the density of sand is 3.00 g/cm3.

Density (ρ) = Mass (m) / Volume (V)

To find the mass, you need to know the weight of a known volume of sand, and to find the volume, you need to know the space occupied by a given mass of sand.

If you have a sample of sand, weigh it using a balance to find its mass (in grams). Let's assume the mass is 100 grams.

To measure the volume of the sand, you can use a graduated cylinder or a displacement method:

1. Graduated Cylinder Method:
- Take a known volume of water in a graduated cylinder (e.g., 100 mL).
- Record the initial volume.
- Carefully add the sand into the graduated cylinder and measure the final volume (which includes the sand).
- Subtract the initial volume from the final volume to find the volume of the sand.

2. Displacement Method:
- Fill a graduated cylinder partially with water and record the initial volume.
- Carefully lower the sand into the graduated cylinder, making sure not to spill water.
- Measure the increase in volume, which is equal to the volume of the sand.

Let's assume the volume of sand measured using either method is 30 mL.

Now, substitute the values into the density formula:

Density (ρ) = Mass (m) / Volume (V)
= 100 g / 30 mL

Convert the volume from milliliters (mL) to cubic centimeters (cm3) since they are equivalent:

Density (ρ) = 100 g / 30 cm3

Calculating the density:

Density (ρ) = 3.33 g/cm3

Therefore, the density of sand in this case is 3.33 g/cm3.