Question

Which statement is false? 27- (A) protons are positively charged particles (B) electrons are negatively charged particles (C) the mass of a proton is greater than the mass of an electron (D) some elements have a neutral nucleus The correct name of the compound having the formula HgS is: (A) mercury(II) sulfide (B) mercury sulfite 28. (C) mercury sulfate (D) mercury(U) sulfide 29. The correct name of the compound having the formula NayPOs is (A) trisodium phosphate (B) sodium(IID phosphate (C) sodium phosphorus tetraoxide (D) sodium phosphate А neutral cobalt atom (Syco) has: (A) 60 p., 27 n°, and 27 e- (B) 33 p., 27 n°, and 60 e- 1.-protone-electron;n° neutron] 30- (C) 27 p", 33 n°, and 33 e- (D) 27 p.. 33 n®. and 27e. 31- An example of a ternary oxo-acid is: (A) HCI (B) KOH (C) HBrO (D) CH Which of the following statements is true? (A) metals react with nonmetals to produce molecular compounds (B) most metals are poor electric conductors (C) metals are usually capable of forming positive ions (D) non-metals do not react with non-metals 32- 33- How many atoms are there in the compound Fe,(SO),? (A) 7 (B) 17 (C) 14 (D) 5 34- All of the following formulas represents binary compounds, except (A) HCIO2 (B) H202 (C) NO2 35. The standard exponential notation for the number 0.0064 is: (B) 6.4 x 10 is: ()64x 10 (A) 64x 10( (C) 64 x 103 (D) 6.4 x 10 36- 10.0 Liters of gasoline are equivalent to: (A) 2.50 gallons (B) 37.8 gallons (C)40 gallons (D)2.64 gallons 37- Liquid A has a volume of 10 mL. and a mass of 12.5 g, and liquid B has a mass of 125 g and a volume of 100 mL. Which statement is true about these two liquids? (A) liquids A has the higher density (C) both liquids have the same density (B) liquids B has the higher density (D) the density of liquid A is 0.80 g/ml [1 gallon 4 qt: 1qt-946 mL] 38- What is the mass in kilograms of a 91 lb of cement? (A) 200 kg (B) 41.3 kg (C)499 kg [1 lb 454 gl (D) 4.99 kg