question 13 (5 points)\nair is a(n)\nheterogeneous mixture.\nelement.\ncompound.\nhomogeneous mixture.\nnone…

question 13 (5 points)\nair is a(n)\nheterogeneous mixture.\nelement.\ncompound.\nhomogeneous mixture.\nnone of the above.\nquestion 14 (5 points)\nthe phrase \ability to do work\ is a definition of\nheating.\nenergy.\nspecific heat.\ncooling.

question 13 (5 points)\nair is a(n)\nheterogeneous mixture.\nelement.\ncompound.\nhomogeneous mixture.\nnone of the above.\nquestion 14 (5 points)\nthe phrase \ability to do work\ is a definition of\nheating.\nenergy.\nspecific heat.\ncooling.

Answer

Brief Explanations:

  • For Question 13: Air is composed of nitrogen, oxygen, carbon - dioxide and other gases uniformly distributed, so it is a homogeneous mixture. A heterogeneous mixture has visibly different components, an element is a pure substance made of only one type of atom, and a compound is a pure substance made of two or more different types of atoms chemically bonded.
  • For Question 14: Energy is defined as the ability to do work. Heating and cooling are processes related to heat transfer, and specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

Answer:

Question 13: D. homogeneous mixture Question 14: B. energy