CHEMISTRY MCGRAW HILL LATEST 2024 EXAM TEST BANK QUESTIONS WITH VERIFIED ANSWERS
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CHEMISTRY MCGRAW HILL
CHEMISTRY MCGRAW HILL LATEST 2024 EXAM TEST BANK QUESTIONS WITH VERIFIED ANSWERS
An unknown element has two isotopes: one whose mass is 114.998 amu (25.00% abundance) and the other whose mass is 117.986 amu (75.00% abundance). The average atomic mass of the element is equal to _____.
A. 115.74...
CHEMISTRY MCGRAW HILL LATEST
2024 EXAM TEST BANK QUESTIONS
WITH VERIFIED ANSWERS
An unknown element has two isotopes: one whose mass is 114.998 amu (25.00%
abundance) and the other whose mass is 117.986 amu (75.00% abundance). The
average atomic mass of the element is equal to _____.
A. 115.74
B. 118.002
C. 117.24
D. 116.50 - Answer-C. 117.24
Which of the following statements correctly describe the arrangement of the periodic
table? Select all that apply.
A. The elements in the large lower-left portion of the periodic table are metals.
B. Some groups are given special names.
C. Elements in the periodic table are arranged in order of increasing atomic mass.
D. The groups are numbered 1 to 7.
E. The horizontal rows of the periodic table are called periods. - Answer-A. B. E.
Which of the following correctly reflect Avogadro's number? Choose all that apply.
A. For a pure substance, the mole specifies only the number of entities in a sample.
B. The number of entities in a mole is called Avogadro's number.
C. The mole contains 6.022 x 1023 entities.
D. The mole is abbreviated mo. - Answer-B. C.
Which of the following correctly reflects Avogadro's number? - Answer-6.022×10^23
entities/ 1mol
Which of the following statements correctly describe groups and regions of the periodic
table? Select all that apply. - Answer-Transition metals are found in Groups 3-11.
Group 2 elements are called alkaline earth metals.
The elements B, Si, and As are included among the metalloids.
True or false: A 16.00-g sample of oxygen atoms contains the same number of particles
as a 4.003-g sample of He atoms. - Answer-True
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