I need help with a chemistry problem

Nov 17th, 2015
KateS
Category:
Chemistry
Price: $5 USD

Question description

11 which of the following intermolecular forces plays a pivotal role in boilogical molecules such as proteins and dna

dispersion force

dipole- dipole force

ion-dipole force

hydrogen bonding

12 which of the following elementsa does NOT form a monatomic ion

helium

oxygen

sodium

notrogen

13 which of these pairs of elements is most likely to be part of a polyatomic ion

K and Cl

Li and Br

Mn and O

Ca and O

14 which fo the following is true about the compound ammonium phosphate

it is a mixture of 3 polyatomic ammonium ions and 2 polyatomic phosphate ions

it is a mixture of 2 monoatomic nitrogen and hydrogen ions one polyatomic phosphate ion

it is salt of monoatomic nitrogen, hydrogen, phosphorus, and oxygen ions

it is a salt of 3 polyatomic ammonium ions and one polyatomic phosphate ion

15 on the basis of bonding which of the following is true about sodium chloride when compared to sucrose  hint sucrose is the chemical name for table sugar

sodium chloride has a higher boiling point than sucrose

sodium chloride dissolves in water but sucrose does not

sodium chloride has a lower melting point than sucrose

sodium chloride crystals are softer than sucrose crystals

16 what is the correct name of the compound Mn3(PO4)2

manganese phosphate

manganese(l)phosphate

manganese(lll) phosphate

manganese (ll) phosphate

17 how many valence electrons should you use to draw a lewis structure of methane (CH4)

2

8

6

4

18 which of the following is a salt

O2

KCl

C2H2

C6H12O6

19 what is a double bond

a total of 2 covalent bonds between molecules

a total of 2 covalent bonds in a molecule

2 covalent bonds between adjacent atoms in a molecule

2 covalent bonds between adjacent molecules

20 in a lewis diagram for methane (CH4) which of the atom or atoms are outside

neither, carbon and hydrogen are both outside

hydrogen

carbon

neither, carbon and hydrogen are both inside



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