MASTERING- Unit 1 Ch 2 Assignment A
Which of the following forms of energy travels in varying wavelengths, such as visible light, infrared waves, radio waves, ultraviolet waves, and X rays?
Electromagnetic energy
What is not one of the three major types of chemical reactions?
Hyperbolic
What is the difference between kinetic and potential energy?
Kinetic energy is energy in action, while potential energy is stored energy.
Which of the following is an example of a decomposition reaction?
MgO2 → Mg + O2
What of the following is not a difference between a compound and a mixture:
Mixtures are homogeneous while compounds are heterogeneous.
Which of the following is true regarding the concentration of solutions?
Molarity is one mole of solute per 1000 ml of solution.
What is not a subatomic particle?
Molecule
T/F Atomic number is equal to the number of neutrons in an atom's nucleus.
false
T/F Chemical properties are determined primarily by neutrons.
false
T/F Hydrogen bonds are comparatively strong bonds.
false
T/F Isotopes differ from each other only in the number of electrons contained.
false
T/F Nonpolar molecules are the result of unequal electron pair sharing.
false
Which reactions will usually be irreversible regarding chemical equilibrium in living systems.
glucose to CO2 and H2O
What type of chemical bond does sodium, element 11, form with chlorine, element 17?
ionic
Salts are always ________.
ionic compounds
T/F A solution contains solvent in large amounts and solute in smaller quantities.
true
T/F Atomic weight of an element is approximately equal to the mass number of its most abundant isotope.
true
T/F Isotopes of the same element have the same atomic number but differ in their atomic masses.
true
T/F The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.
true
What can form hydrogen bonds.
water
An atom with a valence of 3 may have a total of ________ electrons.
13
An element has an atomic number of 17 and a mass of 35. How many protons, neutrons, and electrons does the element have?
17 protons, 18 neutrons, and 17 electrons
Which four elements comprise approximately 96% of body weight?
Carbon, oxygen, hydrogen, and nitrogen.
What does the formula C6H12O6 mean?
There are 12 hydrogen, 6 carbon, and 6 oxygen atoms.
What is the classification of a solution with a pH of 8.3?
alkaline solution
What is NOT a compound? A)liquid water B) oxygen gas C) carbon dioxide D) methane (natural gas)
oxygen gas
Amino acids joining together to make a peptide is a good example of a(n) ________ reaction.
synthesis
The chemical symbol O=O means ________.
the atoms are double bonded
A chemical reaction in which bonds are broken is usually associated with ________.
the release of energy
What is not considered a factor in influencing a reaction?
time
