Correct number of significant figures? 35.0 ml. 35 mL 36.0 mL 36 ml. 35.00 mL Wh
ID: 1067622 • Letter: C
Question
Correct number of significant figures? 35.0 ml. 35 mL 36.0 mL 36 ml. 35.00 mL What is the volume of the Earth if its mass is 5.97 times 10^27 g? (The density of the Earth is 5.51 g.cm^-3) 3.29 times 10^28 cm^3 3.29 times 10^27 cm^3 1.08 times 10^27 9 cm^3 23 times 10^-28 cm^3 9.23 times 10^28 cm^3 Atoms of the same protons with different mass numbers are called ions allotropes isomers isotopes a group How man's protons, electrons, and neutrons are in^32S^2-? 32 protons. 18 electrons. 16 neutrons 32 protons. 14 electrons. 16 neutron 16 protons. 14 electrons. 18 neutrons 16 protons. 16 electrons. 16 neutrons 16 protons. 18 electrons. 16 neutrons Which is the correct name for P_4S_e? Phosphorus(lV) sulfide Phosphorus(IIl) sulfide Tetra phosphorus nepticulid Tetra phosphorus hex sulfide Penta phosphorus nepticulid What is the name of CrO_3? Chromium oxide Chromium(lll) oxide Chromium Trioxide Chromium(VI) oxide Nonchromium trioxide Which of the following is the formula for hydrochloric acid? HClO_4 HClO__3 HClO_2 HClO_HCL If the formula for sodium citrate is Na_3C_6H_5O_7, what is the formula for calcium citrate? CaC_6H_5O_7_3 Ca_2(C_6H_5O_7)_3 Ca_3C_6H_5O_7 Ca(C_6H_5O_7)_2 What is the coefficient for O_2 when the reaction is balanced with smallest whole number coefficients?3 4 5 7 9 How many sodium ions are in 41.0 g of Na_3PO_4? (molar mass of Na_3PO_4 is 164.0 g/mol) 1.20 times 10^24 ions 6.02 times 10^23 ions 4.52 times 10^23 ions 3.01 times 10^23 ions 1.50 times 10^23 ions What mass of oxygen docs 25.5 g of Ca_3(PO_4)_2 contain? (molar mass of Ca_3(PO_4)_2 is 310.0 g/mol) 1.32 g 3.95 g 5.26 g 10.5 g 7.90 g What mass of NaCl is needed to make 500 mL of a 0.500M solution? (molar mass of NaCl is 58.5 g/mol) 0.250 g 14.6 g 29.3 g 58.5 g 117 gExplanation / Answer
(2) Volume of the earth , V = mass / density
= (5.97x1027 g) / (5.51 g/cm3)
= 1.08x1027 cm3
option (C) correct
(3) isotopes
option (D) correct
(4) 16S322-
atomic number is 32 so number o protons are 16
Number of electrons = 16 + 2 = 18
Number of neutrons = mass number - atom ic number
= 32 - 16 = 16
option (E) correct
5) option (D) correct
(6) option (C) correct