Question

25) Calculate the molecular mass of tetraphosphorus decaoxide, P4010. a corrosive substance which can be used as a drying agent. A) 469.73 amu B) 190.97 amu C) 139.88 amu D) 94.97 amu E) 283.88 amu 26) What is the percent sodium in sodium carbonate? A) 45.3% B) 11.3% 21.7% D) 43.4% E) 27.7% 27) What is the chemical name of FeSO3. A) Iron sulfate B) Iron(III) sulfate C) Iron(II) sulfite D) Iron sulfur trioxide E) None of the above names is correct. 28) How many electrons are in a double bond? A) 4 B) 6 C)0 D) 2 E) 1 29) Select the strongest bond in the following group. A) CC B) C-0 C)CC DC-C E) C-F 30) Which of these elements has the greatest electronegativity? A) Sb B) Na As D) CS 31) The total number of lone pairs in NCl3 is A) 9 B) 6 C) 10 D) 13 32) The Lewis structure for CS 2 is: CESS š==

Answer 1

Mola ma8s of Py 0 4 (far p) t lo(fa oxyj en) 4 (30-973762) +lo (IS. 999) amu 111411

283,8 8 amv CE is Core ct Optin