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Chem final

Authored by Joseph Russo

Chemistry

12th Grade

Chem final
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349 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which list of symbols represents nonmetals, only?

B, Al, Ga

Li, Be, B

C, Si, Ge

P, S, Cl

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the chemical formula for lead(IV) oxide?

PbO2

PbO4

Pb2O

Pb4O

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which statement describes the general trends in electronegativity and atomic radius as the elements in Period 2 are considered in order from left to right? 

Both electronegativity and atomic radius increase.
Both electronegativity and atomic radius decrease. 
Electronegativity increases and atomic radius decreases.
Electronegativity decreases and atomic radius increases.

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)? 

14.6% 
29.2%
8.4%
87.5%

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Given the balanced equation:
2KI + F2 → 2KF + I2
Which type of chemical reaction does this equation represent? 

synthesis 
decomposition
single replacement 
double replacement 

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Which formula represents a nonpolar molecule containing polar covalent bonds?

1
2
3
4

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the total amount of heat required to completely melt 347 grams of ice at its melting point? 

334 J
1450 J
116000 J
784000 J

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