**Mass of the Object**

To determine the mass of the object, we need to know the density of the material from which it is made. Density is defined as the mass per unit volume. Since we are given the area of the object, we can calculate the volume by multiplying the area by the height or thickness of the object. However, without the height or thickness information, we cannot accurately determine the mass of the object.

**Atmospheric Pressure on the Object**

The atmospheric pressure is the force per unit area exerted by the Earth's atmosphere on an object. It is caused by the weight of the air above the object. The atmospheric pressure varies with altitude, temperature, and weather conditions.

To calculate the atmospheric pressure on the object, we need to know the height or altitude at which the object is located. The atmospheric pressure decreases with increasing altitude. At sea level, the average atmospheric pressure is approximately 101.3 kilopascals (kPa) or 1 atmosphere (atm).

In order to accurately determine the atmospheric pressure on the object, we would need additional information such as the altitude at which the object is placed. Without this information, we cannot provide an exact value for the atmospheric pressure.

However, we can mention that the atmospheric pressure on the object would be the same as the atmospheric pressure at the location where the object is situated. If the object is at sea level, the atmospheric pressure would be approximately 101.3 kPa or 1 atm.

It's important to note that the mass of an object and the atmospheric pressure it experiences are two different properties and are not directly related to each other. The mass of an object depends on its density and volume, while the atmospheric pressure on an object depends on the altitude and the weight of the air above it.