Question

1) What term describe the region in space where there is a high probability of finding an electron?

a) Quantum

b) Dimension

c) Configuration

d) Orbital

2. Using the bronsted-lowry theory of acids and bases, what is the conjugate acid of HSO4?

a) H2SO4

b) 2HSO4

c) HSO4

d) SO42

3.) How is the atomic mass of any element calculated?

a) Protons plus electron

b) Protons plus neutrons

c) Electrons plus neutrons

d) It is the number of protons

4.) A one-liter balloon is composed of 0.5 mole of helium gas, what volume will 1.8 moles of helium occupy at the same temperature and pressure?

a) 4.2 liters

b) 3.6 liters

c) 0.6 liters

d) 0.3 liters

5.) What biochemical compound, produced during cellular respiration, is used as the energy currency of the cell?

a) Glycogen

b) Acetic acid

c) Lactic acid

d) Adenosine triphosphate

6.) What is the correct characteristic of nitrogen?

a) Have 10 neutrons.

b) Is a nonmetal

c) Exists in nature as monoatomic gas

d) Has 9 electrons.

7.) What type of biochemical molecule contains two or more amino acids joined by peptide bonds?

a) Protein

b) Lipids

c) Carbohydrate

d) Nucleic acid

Answer 1

1) What term describe the region in space where there is a high probability of finding an electron?

d) Orbita; since the electron is a "density probability cloud"

2. Using the bronsted-lowry theory of acids and bases, what is the conjugate acid of HSO4?

First, let us define Bronsted Lowry acid/base:

Bronsted Lowry acid: any species that will donate H+ (protons) in solution, and makes pH lower (i.e HCl)

Bronsted Lowry base: any species that will accept H+ (protons) in solution, and makes pH higher (NH3 will accept H+ to form NH4+)

Typically, acid/bases are shown in the left (reactants)

HSO4- + H+ --> H2SO4(conjguate aicd)

H2SO4

3.) How is the atomic mass of any element calculated?

addition of protons + neutrons, no need to include electrons since those are much lighter and will not chang e% drastically

4.) A one-liter balloon is composed of 0.5 mole of helium gas, what volume will 1.8 moles of helium occupy at the same temperature and pressure?

V = 1L; n = 0.5

Apply avogrados law

V1/n1 = V2/n2

V2 = n2/n1*V1 = 1.8/0.5 * 1 = 3.6 L

5.) What biochemical compound, produced during cellular respiration, is used as the energy currency of the cell?

d) Adenosine triphosphate --> also known as ATP

6.) What is the correct characteristic of nitrogen?

the best fit is -->

b) Is a nonmetal

since all other are false

7.) What type of biochemical molecule contains two or more amino acids joined by peptide bonds?

this is called Nucleic acid , choose D