circle the number which best answers each question.\n1 the particle diagram below represents a sample of…

circle the number which best answers each question.\n1 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) single element\n(2) a mixture of elements\n(3) a mixture of compounds\n(4) a single compound\n2 the particle diagram below represents a mixture of reactants.\nwhich diagram for the products of the reaction demonstrates the law of conservation of mass?\n3 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) single element\n(2) a mixture of elements\n(3) a mixture of compounds\n(4) a single compound\n4 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) a heterogeneous mixture of elements and compounds\n(2) a heterogeneous mixture of elements\n(3) a homogeneous mixture of elements\n(4) a homogeneous mixture of elements and compounds\nfor each of the following, determine if it is a chemical or physical change and justify your answer.\nphysical or chemical: \njustify: \nphysical or chemical: \njustify: \nthe first image below shows hi in liquid form. in the second box, draw hi after it changes to the gaseous state.

circle the number which best answers each question.\n1 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) single element\n(2) a mixture of elements\n(3) a mixture of compounds\n(4) a single compound\n2 the particle diagram below represents a mixture of reactants.\nwhich diagram for the products of the reaction demonstrates the law of conservation of mass?\n3 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) single element\n(2) a mixture of elements\n(3) a mixture of compounds\n(4) a single compound\n4 the particle diagram below represents a sample of matter.\nwhich best describes the composition of the sample?\n(1) a heterogeneous mixture of elements and compounds\n(2) a heterogeneous mixture of elements\n(3) a homogeneous mixture of elements\n(4) a homogeneous mixture of elements and compounds\nfor each of the following, determine if it is a chemical or physical change and justify your answer.\nphysical or chemical: \njustify: \nphysical or chemical: \njustify: \nthe first image below shows hi in liquid form. in the second box, draw hi after it changes to the gaseous state.

Answer

Explanation:

Step1: Analyze question 1

The particle - diagram in question 1 shows identical molecules made of two different types of atoms. This indicates a single compound.

Step2: Analyze question 2

The Law of Conservation of Mass states that the number and type of atoms before and after a reaction must be the same. In the reactant diagram, there are single - atom elements and di - atomic elements. The product diagram that has the same number and type of atoms as the reactant diagram is the one that demonstrates the Law of Conservation of Mass.

Step3: Analyze question 3

The particle diagram in question 3 shows different types of single - atom elements mixed together, which is a mixture of elements.

Step4: Analyze question 4

The particle diagram in question 4 shows a non - uniform distribution of different elements and compounds, which is a heterogeneous mixture of elements and compounds.

Step5: Analyze physical/chemical change questions

For the first physical/chemical change question, new substances are formed as the molecules are rearranged, so it is a chemical change. For the second physical/chemical change question, the molecules just change their arrangement and no new substances are formed, so it is a physical change.

Step6: Draw HI in gaseous state

In the gaseous state, HI molecules are more spread out compared to the liquid state.

Answer:

  1. (4) a single compound
  2. (4) (the diagram with the same number and type of atoms as the reactant diagram)
  3. (2) a mixture of elements
  4. (1) a heterogeneous mixture of elements and compounds Physical or Chemical (first pair): Chemical; Justify: New substances are formed. Physical or Chemical (second pair): Physical; Justify: No new substances are formed, only change in arrangement. For drawing HI in gaseous state: Draw HI molecules more spread out than in the liquid - state diagram.