Liquefied gases have boiling points well below room temperature. On the Kelvin scale the boiling points of the following gases are: He, 4.2 K; N₂, 77.4 K. Convert these temperatures to the Celcius and the Fahrenheit scales.
He
(No Response)

-268.9

°C
(No Response)

-452.1

°F
N₂
(No Response)

-195.8

°C
(No Response)

-320.4

°F

Convert each of the following into a correct formula represented with correct notation. (Type your answer using the format CO2 for CO₂ and Cu(OH)2 for Cu(OH)₂.)

(a) ZnOH
(No Response)

Zn(OH)2

(b) (NH₄)²SO₄
(No Response)

(NH4)2SO4

(c) Na₂OH
(No Response)

NaOH

(d) Zn(CO₃)₂
(No Response)

ZnCO3

(e) AlOH₃
(No Response)

Al(OH)3

Ammonia is formed in a direct reaction of nitrogen and hydrogen.

N₂(g) + 3 H₂(g) 2 NH₃(g)

A tiny portion of the starting mixture is represented by the diagram, where the blue spheres represent N and the white shperes represent H. Which of the following represents the product mixture?

figure number
(No Response)

4

For the reaction of the given sample, which of the following is true?

The skeleton and a ball-and-stick model for the nitrous acid molecule, HNO₂, are shown here.

Draw the Lewis formula. (Do this on paper. Your instructor may ask you to turn in this work.)


What are the hybridizations at the middle O and N atoms? (Type your answer using the format sp3d for sp³d.)
O
(No Response)

sp3

N
(No Response)

sp2

Rate data were collected for the following reaction at a particular temperature.

A + B products

(a) What is the rate-law expression for this reaction? (X² is represented by X2 in the pulldown menu.)
(No Response)

9.0

M(No Response)

-2

·s^-1(No Response)

[A]²[B]

(b) Select the correct description of the order of the reaction with respect to each reactant and to the overall order.

first order in [A] second order in [A] third order in [A] first order in [B] second order in [B] second order overall third order overall fourth order overall