Characters used: 0/15000 Question 2
Compare the densities of the two groups of pennies. What do you think caused them to have different densities?
BI y XX, Font Sizes A- A E 1 E 25 m
Characters used: 0/15000
Question 3

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.