1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
postnew [5]
3 years ago
5

Here this is a clearer photo so what should I do

Chemistry
1 answer:
uysha [10]3 years ago
8 0
What part of chemistry is this
You might be interested in
How many vibrational modes does ethanol have? Explain why.
Artyom0805 [142]

Answer:

The ethanol has 21 vibrational modes.

Explanation:

A molecule can show 3 types of motions: one external called translational and two internal called rotational and vibrational.

In order to calculate the vibrational modes of a molecule we need to know the degrees of freedom of this molecule, it means the number of variables that are involved in the movement of this particle.

If we know that atoms are three dimensional we will know that they have 3 coordinates expressed as 3N. But the atoms are bonded together so they can move not only in translational but also rotational and vibrational. So, the rotational move can be described in 3 axes and the other vibrational move can be described as

3N-5 for linear molecules

3N-6 For nonlinear molecules like ethanol

So using the formula for nonlinear molecules where N is the amount of atoms in the chemical formula, so ethanol has 9 atoms

3(9)-6= 21

Thus, ethanol has 21 vibrational modes.

5 0
3 years ago
Temperature is a measure of how much heat you have in, or around you. is it true or false
allochka39001 [22]

Your answer is

true

hope it helps you

7 0
2 years ago
Which of the following methods would be the best method for separating oil from water?
vazorg [7]
Oil and water can separate by utilizing a separating funnel, oil and water are totally insoluble in one another. The water structures lower while the oil forms the upper layer.
8 0
2 years ago
11. A car traveling on a straight interstate at a 60 mph with its cruise
satela [25.4K]
The correct answer C - acceleration
3 0
3 years ago
Given the following at 25C calculate delta Hf for HCN (g) at 25C. 2NH3 (g) +3O2 (g) + 2CH4 (g) ---> 2HCN (g) + 6H2O (g) delta
AysviL [449]

<u>Answer:</u> The \Delta H_f for HCN (g) in the reaction is 135.1 kJ/mol.

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. The equation used to calculate enthalpy change is of a reaction is:

\Delta H_{rxn}=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]

For the given chemical reaction:

2NH_3(g)+3O_2(g)+2CH_4(g)\rightarrow 2HCN(g)+6H_2O(g)

The equation for the enthalpy change of the above reaction is:

\Delta H_{rxn}=[(2\times \Delta H_f_{(HCN)})+(6\times \Delta H_f_{(H_2O)})]-[(2\times \Delta H_f_{(NH_3)})+(3\times \Delta H_f_{(O_2)})+(2\times \Delta H_f_{(CH_4)})]

We are given:

\Delta H_f_{(H_2O)}=-241.8kJ/mol\\\Delta H_f_{(NH_3)}=-80.3kJ/mol\\\Delta H_f_{(CH_4)}=-74.6kJ/mol\\\Delta H_f_{(O_2)}=0kJ/mol\\\Delta H_{rxn}=-870.8kJ

Putting values in above equation, we get:

-870.8=[(2\times \Delta H_f_{(HCN)})+(6\times (-241.8))]-[(2\times (-80.3))+(3\times (0))+(2\times (-74.6))]\\\\\Delta H_f_{(HCN)}=135.1kJ

Hence, the \Delta H_f for HCN (g) in the reaction is 135.1 kJ/mol.

8 0
3 years ago
Other questions:
  • Which of the following substances would you predict to have the highest ΔHvap?
    11·1 answer
  • How many electrons will fit on an outermost shell of an atom? A. 4 B. 8 C. 10 D. 12
    9·1 answer
  • How many grams of O2(g) are needed to completely burn 94.4 g of C3H8(g)?
    6·1 answer
  • Which of the following pairs would have the greatest coulombic attraction in a solid compound? 1. mg2+, S2- 2. mg2+, se2- 3.mg2+
    7·1 answer
  • Which is the metric root for length?<br> a. gram<br> b. liter<br> c. meter<br> d. second
    5·1 answer
  • Is another way in which nitrogen gets fixed in the soil​
    12·1 answer
  • What are the uses of polythene ?
    10·1 answer
  • PLEASE HELP
    14·2 answers
  • What is the unit of measurement used to report mass
    6·2 answers
  • Write two half‑reactions to describe each of these metal displacement reactions. Include phase symbols.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!