Question

hint: sometimes you have to find the mass of a substance in a container. find the mass of the container alone. then subtract that mass from the combined mass.
mass of substance and container 29 g
mass of container - 13 g
mass of substance 16 g

1. using the diagram on the right, find the combined mass of the substance and its container. what is the mass of the sub - stance if the mass of the container is 25 g?
2. what is the mass of a powder if the combined mass of the powder and its container is 12 grams and the mass of the container alone is 4 grams?
3. think about it how are the three beams on a triple - beam balance different?

Explanation:

Step1: Calculate combined mass

The combined mass of the substance and container on the triple - beam balance is the sum of the values on the beams: $3.4 + 300+90=393.4$ g.

Step2: Calculate mass of substance

Subtract the mass of the container from the combined mass. Given container mass is 25 g. So mass of substance is $393.4 - 25 = 368.4$ g.

Step3: Solve for second problem

For the second problem, given combined mass of powder and container is 12 g and container mass is 4 g. Mass of powder is $12 - 4=8$ g.

Step4: Answer third problem

The three beams on a triple - beam balance have different scales. The top beam usually measures in 0.1 - 10 g increments, the middle beam in 10 - 100 g increments, and the bottom beam in 100 - 500 g increments (or similar depending on the balance), allowing for precise mass measurements over a wide range.

Answer:

1. Combined mass: 393.4 g, Mass of substance: 368.4 g
2. 8 g
3. The three beams have different scales for different mass ranges to allow for precise and wide - range mass measurements.