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ACS Final Exam Practice Questions

Practice ACS exam questions on unit conversions: speed of light in nm/ms and helium density in lb/ft³, helping students prepare for the General Chemistry official guide exam.

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    Final Exam Practice Questions From Preparingfor Your ACS Exam (nation in General Chemistry: The Official Guide Constants and Conversions 7? = 8.314 ? • ?o? - 1 - ? - J 7? = 0.0821 ? ■ at? ■ ?o? - 1 - ? - 1 N A = 6.022 x 1(P mol-i h = 6.62 x Iff 34 J-s c = 2.998 x 10 s m-s 1 0°C = 273.15 K 1 atm = 760 mmHg 1 atm = 760 ton 1. The speed of light is 3.0xl0 3 m s. What is this speed in nm ms? A. 3.0x10 4 * nm ms B. 3.0x10 : nmms C. 3.0x10 14 nm ins D. 3.0x10 20 nm ms 2. The density of helium is 0.164 kg m 3 . What is this density in lb ft 3 ? 1 kg=2.20 lb and 1 m=3.28 ft. A. 0.0102 lb ft 3 B. 0.1101b ft 3 C. 1.18 lb ft 3 D. 12.71b.ft 3 3. Based on the figure what volume should be reported for the liquid? A. 20.8 mL B. 20.68 mL C. 20.6 mL D. 20.57 mL 4. What is the correctly reported mass of water based on the data in the table? A. B C. D. 5. A. B C D. 1.3 g 1.30 g 1.298g 1.2980 g What is the name of TifPOyw? Titanium phosphate Titanium (III) phosphate Titanium (IV) phosphate Titanium tetraphosphate Mass of beaker and water Mass of beaker only 29.62 g 28.3220 n

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    6. The formula of strontium hexafluorosilicate is SrSiFj. What is the formula of aluminum hexafluorosilicate? A AlSiFj B. Al SiF a C. Al=SiF s D. Al.<SiF 6 )i 7. Which is NOT named correctly? A. MnCh manganese (II) oxide B. CuSOi copper (If) sulfate C. NajPOt sodium phosphate D. CaFi calcium fluoride S. What is the correct name for NjO? ? A. Nitrogen (II) oxide B. Nitrogen (V) oxide C. Dinitrogen oxide D. Dinitrogen pentoxide 9. What is the formula of sulfur tricxide? A SO; B. SOs C. S O / D. S O / 10. What is the name of HBrO 4 (aq)? A. Bromic acid B. Bromous acid C. Hydrobroniic acid D. Perbromic acid 11. What is the formula of hydroiodic acid? A. HI (aq) B. HIO (aq) C. EHCh(aq) D. HIOh(aq) 12. If a palladium nanoparticle has a density of 12.0 g cm-, tvhat is the mass of a nanoparticle with a volume of l.S4xlO"* ] cm 3 ? A. 2.21xl0" :o g B. 1.63xlO" 2C g C. 6.52x10-21 g D. 1.53x10"“ g 13. Which sample has the largest volume? The density' of aluminum is 2.7 g cnr and for copper is 9.0 gem*. A. 1.0 g aluminum B. 5.0 g aluminum C. 1.0 g copper D. 5.0 g copper

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    16. In all neutral atoms, there are equal numbers of A. Protons and neutrons B. Positrons and electrons C. Neutrons and electrons D. Electrons and protons

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    17. Which pair of particles has the same number of electrons? A. F; Mg 2 ’ B . Ne, Ar C. B r S e D. Al-'TF IS. Which element is represented by j X? A. Iron B . Germanium C Barium D. Chromium 19. Which statement is true? A. The nucleus of an atom contains neutrons and elections. B . The atomic number of an element is the number of protons in one atom. C. The mass number of an atom is the number of protons in the nucleus plus the number of electrons outside. D. The number of electrons outside the nucleus is the same as the number of neutrons in the nucleus. 20. A sodium ion differs from a sodium atom in that the sodium ion A. Has fewer electrons. B . Is an isotope of sodium. C. Exists only in solution. D. Has a negative charge on its nucleus. 21 . Two isotopes of hypothetical element X exist with abundance of 30.00% - C0 X and 70.00% 10 L X. What is the approximate atomic mass of X (in atomic units, amu)? A. 100.3 B. 100.5 C. 100.7 D. 101.0 22. Which element is an actinide? A. Rb B. U C. Mo D. Ga 23. Which compound contains a —1 ion? A. MgO B. KC1 C. NO D. ALP 24. If gallium, atomic number 31, combines with selenium, atomic 34. what is the most likely formula based on your knowledge of the periodic nature of the elements? A. GaSe B. GaSe C. Ga ; Se D. Ga ; Se 3

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