A typical baseball cap weighs about 80-100 grams.
Since a baseball cap weighs less than one kilogram, using grams would better. For example 120 grams, as opposed to 0.12 kilograms.
The mass of a baseball is typically 145 grams.
The mass of a baseball is typically around 0.145 kg in SI units.
10 grams
About 0.143 pounds or 2.29 ounces.
The mass of 60 grams is 60 grams, the mass of 0 grams is 0 grams, and the mass of 2.2 grams is 2.2 grams.
If the bottle holds 500 mL of water, then its contents have a nominal mass of 500 grams, and weigh 4.9 newtons (1.1 pounds) on Earth. -- If it holds some other substance, then its mass and weight are different. -- If it is weighed in some other place, then the weight of the same mass is different. -- This discussion applies only to the bottle's contents. We have no way to estimate the mass or weight of the container.
To determine the mass of the sand, you'll need to subtract the mass of the container (14.5 grams) from the total mass of the container with sand in it. For example, if the total mass of the container with sand is 50 grams, then the mass of the sand would be 50 grams - 14.5 grams = 35.5 grams.
The mass of the powder is 8 grams. This can be calculated by subtracting the mass of the container (4 grams) from the combined mass of the powder and container (12 grams), leaving the mass of the powder as 8 grams.
Grams are a measure of mass.
The unit of measurement most useful for a baseball's weight is ounces.