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Hello, If someone can help me with some time sensitive questions that would be great!

Please help me choose the best possible answer.

I have most of the answers, I just need to double check my work before turning it in.

Please show/explain your work to help me understand.

Thanks in advance! 



Question 1


Choose the correct number of electrons in the Lewis structure for NH3

Group of answer choices



zero


one


four


eight

 


Question 2


If the electronegativity difference between two atoms X and Z is 1.0,the bond between the two atoms would be

Group of answer choices



ionic


polar covalent


coordinate covalent


more than one correct response


no correct response

 


Question 3


Choose the appropriate number of atoms contained in a formula unit of iron(II) hydroxide.

Group of answer choices



two atoms per formula unit


three atoms per formula unit


four atoms per formula unit


five or more atoms per formula unit

 


Question 4


Elements in groups IIA and VIIA of the periodic table would, respectively, be expected to form ions with charges of

Group of answer choices



+2 and +7


+2 and +1


-2 and -7


+2 and -1

 


Question 5


Elements in groups IA and VIIA of the periodic table possess, respectively, how many valence electrons?

Group of answer choices



1 and 1


1 and 7


7 and 1


8 and 8

 


Question 6


Select the correct numerical value for the number of moles of S in two moles of H2SO4

Group of answer choices



1


2


6


12

 


Question 7


Avogadro's number of sulfur (S) atoms would have a mass of

Group of answer choices



6.02*10^-23 g


16 g


6.02*10^23 g


32 g

 


Question 8


What is the volume, in liters, occupied by 2.12 moles of N2 gas at 0.745 atm pressure and a temperature of 55oC?

Group of answer choices



42.5 L


76.6 L


1.3*10^-2 L


12.8 L

 


Question 9


Indicate what the missing words are in the following statement of Charles's law: At constant pressure, the volume of a gas sample is _______ proportional to its _______ temperature.

Group of answer choices



directly; Celsius


inversely; Celsius


directly; Kelvin


inversely; Kelvin

 


Question 10


Considering change of state descriptions, select the name of the change of the state for an endothermic change

Group of answer choices



freezing


condensation


deposition


sublimation

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"Thank you for your explanations with the answer."

Subject: Chemistry, Science
I have most of the answers, I just need to double check my work before turning it in. Thanks in advance!
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