Question 5 of 5 A student studies how an object's mass and speed are related to its kinetic energy. The table shows the results for one part of the investigation. ? Kinetic energy (J) 1 100 2 200 3 300 Which two terms are most likely to be used to label the data in the first column? A. (m/s) B. Speed C. (kg) D. Mass

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Answer explain why it is not possible to deduce a complete order of reactivity.