which of the following would remain a liquid longest as the temperature continues to drop? propane, octane, hexane, ethane

Mademuasel [1]

All you have to do is research more about this scientist´s theory. Just google: Why wasn´t Wegner´s hypothesis accepted?
Trust me, the answers are there.
Next time just research it.
Wegner´s idea seemed so ridiculous at the time that he was ridiculed by other scientists. The problem was that to his colleagues there seemed no plausible mechanism for how the continents could move through the oceans.

6 0

4 years ago

The azide ion, n−3, is a symmetrical ion, all of whose contributing structures have formal charges. draw three important contrib

GREYUIT [131]

The azide ion N3- can actually be represented by 3 resonance structures.

(check attached image for the structures)

Among the three, the Structure 1 is the most important one. While structure 3 almost makes no contribution due to the positive charges located on the adjacent atoms and the overall higher formal charge.

3 0

3 years ago

Read 2 more answers

Reaction Rates

inn [45]

Answer:

PART A 1st order in A and 0th order in B

Part B The reaction rate increases

Explanation:

PART A

The rate law of the arbitrary chemical reaction is given by

$-r_A=k\times\left[A\right]^\alpha\times\left[B\right]^\beta\bigm$

Replacing for the data

Expression 1 $0.00639=k\times{0.12}^\alpha\times{0.22}^\beta$

Expression 2 $0.01280=k\times{0.24}^\alpha\times{0.22}^\beta$

Expression 3 $0.00639=k\times{0.12}^\alpha\times{0.11}^\beta$

Making the quotient between the fist two expressions

$\frac{0.00639}{0.01280}=\left(\frac{0.12}{0.24}\right)^\alpha$

Then the expression for $\alpha$

$\alpha=\frac{ln\frac{0.00639}{0.01280}}{ln\frac{0.12}{0.24}}=1\bigm$

Doing the same between the expressions 1 and 3

$\frac{0.00639}{0.00639}=\left(\frac{0.22}{0.11}\right)^\beta$

Then

$\beta=\frac{ln\frac{0.00639}{0.00639}}{ln\frac{0.22}{0.11}}=0\bigm$

This means that the reaction is 1st order respect to A and 0th order respect to B .

PART B

By the molecular kinetics theory, if an increment in the temperature occurs, the molecules will have greater kinetic energy and, consequently, will move faster. Thus, the possibility of colliding with another molecule increases. These collisions are necessary for the reaction. Therefore, an increase in temperature necessarily produces an increase in the reaction rate.

4 0

3 years ago

How many atoms of oxygen are in 5Li2SO4

olga55 [171]

Answer:

20 oxygen atoms

Explanation:

Li2SO4 has 4 oxygen atoms, so if there are 5 of that compound then there will be 20 oxygen atoms.

8 0

3 years ago

How many molecules of glucose (C6H12O6) are present in 23.3 g of the substance?

abruzzese [7]

Answer:

11

Explanation:

molecules

4 0

4 years ago

Read 2 more answers