STRAIGHTERLINE CHEMISTRY FINAL EXAM TEST with complete verified correct solutions latest update 2025

STRAIGHTERLINE CHEMISTRY FINAL
EXAM TEST with complete verified correct
solutions latest update 2025


Which of these elements is chemically similar to magnesium?



Select one:

a. Sulfur

b. Calcium

c. Iron

d. Nickel

e. Potassium --- correct answer ---b. Calcium




C(graphite) and C(diamond) are examples of:



Select one:

a. isotopes of carbon.

b. allotropes of carbon.

c. the law of definite proportions.

,d. different carbon ions. --- correct answer ---b. allotropes of carbon.



The 80Br- ion has



Select one:

a. 45 protons, 35 neutrons, 45 electrons.

b. 35 protons, 45 neutrons, 34 electrons.

c. 35 protons, 45 neutrons, 36 electrons.

d. 45 protons, 35 neutrons, 46 electrons.

e. 35 protons, 45 neutrons, 46 electrons. --- correct answer ---e. 35
protons, 45 neutrons, 46 electrons.




The formula for sodium sulfide is

Select one:

a. NaS

b. K2S

c. NaS2

d. Na2S

e. SeS --- correct answer ---d. Na2S

,Which one of the following formulas of ionic compounds is the least
likely to be correct?

Select one:

a. NH4Cl

b. Ba(OH)2

c. Na2SO4

d. Ca2NO3

e. Cu(CN)2 --- correct answer ---d. Ca2NO3



What is the name of ClO - ion?

Select one:

a. hypochlorite

b. chlorate

c. chlorite

d. perchlorate

e. perchlorite --- correct answer ---a. hypochlorite




Which of the following is a molecular formula for a compound with an
empirical formula of CH?

Select one:

a. C2H6

, b. C3H9

c. C4H10

d. C6H6

e. None of the answers is correct. --- correct answer ---d. C6H6




Which is the correct electron configuration for gold?




Select one:

a. [Xe]4f145d96s2

b. [Xe]4f145d106s2

c. [Xe]4f135d106s2

d. [Xe]4f145d106s1

e. None of the electron configurations is correct. --- correct answer ---
d. [Xe]4f145d106s1




A(n) _________ is a point at which a standing wave has zero
amplitude.

Select one:

a. crevice

b. node

c. pit