Project #71140 - chemistry

need help in chemistry 

1. Convert 7.13 mm to inches (‘m’ means ‘milli’) a. 0.0281 inch b. 0.181 inch c. 0.281 inch d. 1.81 inches e. 2.81 inches 2. An Erlenmeyer flask contains 250.0 mL of grain alcohol (d = 0.789 g/cm3 ). What is the mass of the grain alcohol? a. 197 g b. 197.3 g c. 316.9 g d. 3.16 x 10 -3 g e. insufficient information given 3. Convert 50 degrees Celsius to Farenheit. a. 12 °F b. 50 °F c. 60 °F d. 94 °F e. 122 °F 4. How many zeros are significant digits in 0.0057091? a. 0 b. 1 c. 2 d. 3 e. 4 2. Which of the following molecules would have a covalent bond? a. N2O b. CsF c. ICl3 d. a and c e. a, b and c 3. The number of dots in a Lewis symbol for an element equals the … a. total number of electrons in the element. b. number of electrons needed to fill the outermost p orbitals. c. period number that contains the element. d. number of valence electrons. e. number of outermost s electrons. 4. Given the following electronegativities [EN (Si) = 1.8, EN (P) = 2.1, EN (S) = 2.5, EN (Cl) = 3.0], which will have the more polar bond? a. Si – Cl b. P – Cl

Subject Science
Due By (Pacific Time) 05/15/2015 04:00 pm
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