For this homework, the concept of “Density” and “Heat” will be explored. Density

Question

For this homework, the concept of “Density” and “Heat” will be explored.

Density is the “compactness” of a material, or stated in a formula it is how much it weighs (mass) divided by how much space it takes up (volume). For pure water the density is 1 gram for every milliliter of water (1 g/ml). From the table below, determine what elements are described in Questions 1-3.

Name of element

Density (g/ml)

Magnesium

1.74

Silicon

2.33

Bismuth

9.80

Zinc

7.14

Sodium

0.97

Boron

2.34

1. Item weighs 25 grams and takes up 3.5 ml of volume ______________ (1 pt)

2. Item weighs 117 grams and takes up 50 ml of volume _____________ (1 pt)

3. This item floats on water _______________ (1 pt)

4. If all these items were mixed together, which one is expected to sink to the bottom? _________ (1 pt)

Name of element

Density (g/ml)

Magnesium

1.74

Silicon

2.33

Bismuth

9.80

Zinc

7.14

Sodium

0.97

Boron

2.34

Explanation / Answer

1. density is 25 grams/ 3.5 ml = 7.14 ----> zinc

2. 117 grams/50ml = 2.34 grams/ml ------>Silicon

3.If item floats on water density is less than 1 gram/ml ---> 0.97 --->Sodium

4.Bismuth as it is the most dense material

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