Matter
Atoms, Moles, and Compound
Reaction and Stoichiometry
Heat, Gases, and Electrons
Bonding, shapes, and Forces
100

A combination of sand, salt, and water is an example of a 

a. heterogeneous mixture

b. solid

c. compound

d. homogeneous mixture

e. pure substance

heterogeneous mixture 

100

Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?

a. Cs, Ba

b. Ga, Ge

c. H, Li

d. C, O

e. Ca, Sr

Ca, Sr

100

What is the charge on the manganese in the compound MnCO3?

+2

100

Which of the following is an exothermic process? 

a. water evaporating

b. ice melting

c. boiling soup

d. condensation of water vapor

e. ammonium thiocyanate and barium hydroxide are mixed at 25C, the temperature drops

Condensation of water vapor

100

Which is the longest bond? 

a. C=C

b. C-C

c. C-H

d. C ≡ C 



 C-C
200

which one of the following is an extensive property? 

a. boiling point

b. mass

c. melting point

d. density

mass


200

What is the formula for the compound Copper (I) chloride?

CuCl

200

HBr, HCl, HClO4, KBr, and NaCl are all classified as 

a. weak electrolytes

b. acids

c. nonelectrolytes

d. strong electrolytes. 

Strong electrolytes

200

The value of ΔH for the reaction below is -790KJ. The enthalpy change accompanying the reaction of 0.95 g of S is ___ KJ. 

2S (s) +3O2 (g) --> 2SO3 (g)

a. -790

b. -23

c. 23

d. -12

e. 12

-12KJ

200

What is the hybridization of the central atom in SO₂?

a. sp

b. sp2

c. sp3​

d. sp3d

​​​

sp2

300

define physical property and chemical property

Physical property: can be observed without changing the identity

Physical property: can be observed without changing the identity

300

Which of the following is a symbol for unit that is not a direct measurement. 

a. s

b. g

c. cm3

d. mol

cm3

300

What volume (ml) of a concentrated solution of sodium hydroxide (6.00M) must be diluted to 200ml to make a 0.880M solution of sodium hydroxide.

29.3

300

A sample of iron absorbs 81.0 J of heat, upon which the temperature of the sample increases from 19.7C to 28.2C. If the specific heat of the iron is 0.450J/gK, what is the mass (in grams) of the sample> 

a. 4.29g

b. -21.2g

c. 0.0472g

d. 3.83g

e. 21.2g

21.2g

300

What is the molecular geometry of NH₃ (ammonia)?

a. Trigonal planar
b. Trigonal pyramidal
c. Tetrahedral
d. Bent

trigonal pyramidal

400

which one of the following is the highest temperature? 

a. 302K

b. 38C

c. 98 F

d. all of them is the same

38C

400

There are ___ protons, ____ neutrons, and ____electrons in 238U+5.

92, 146, 87

400
In every balanced chemical equation, each side of the equation is the same number of

a. coefficients

b. moles

c. atoms

d. molecules

atoms

400
Na reacts with element X to form an ionic compound with the formula Na3X. Ca will react with X to form ___? 

a. Ca2X3

b. Ca3X2

c. CaX2

d. CaX

e. Ca3X

Ca3X2

400

What is the bond angle in a carbon dioxide (CO₂) molecule?

a. 90°
b. 104.5°
c. 120°
d. 180°

180, linear

500

The density of a gold nugget is 19.3g/cm3. If the volume of the gold nugget is 0.00369 L, the mass of the nugget is ___g.

71.2g

500

How many molecules of CH4 are in 48.2 g of this compound?

1.81*1024

500

Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: 

N2 (g) + 3H2 (g) --> 2NH3 (g)

A ___ g sample of N2 requires 3.0g of H2 for complete reaction. 

14g

500

Which of the following is not a valid set of four quantum numbers? (n, l, ml, ms)

a. 3, 1, -1, -1/2

b. 1, 1, 0, +1/2

c. 2, 0, 0, +1/2

d. 1, 0, 0, +1/2

e. 2, 1, 0, -1/2

1, 1, 0, +1/2

500

What is the formal charge on the nitrogen atom in the ammonium ion (NH₄⁺)?

a. 0
b. +1
c. -1
d. +2

+1
M
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