29 Which of the following is true about mixtures and compounds?
A.
A mixture contains different substances that are not chemically combined with one another.
B.
A compound forms when different substances chemically combine to form a new substance.
C.
Mixtures and compounds are both made of two or more different substances.
D.
all of these

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1: