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scZoUnD [109]
3 years ago
7

Which of the following pairs of elements would form a covalent compound?

Chemistry
1 answer:
qwelly [4]3 years ago
8 0

Answer:

Nitrogen and Oxygen

Explanation:

they are both nonmetals

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Mixture is a
yaroslaw [1]

Answer:

compund

Explanation:

i took the quiz

4 0
3 years ago
A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a reaction in which ΔH = −310.1 kJ/m
ruslelena [56]

Answer:

3211.12 K

Explanation:

The expression for the standard change in free energy is:

\Delta G=\Delta H-T\times \Delta S

Where,  

\Delta G is the change in the Gibbs free energy.

T is the absolute temperature. (T in kelvins)

\Delta H is the enthalpy change of the reaction.

\Delta S is the change in entropy.

For reaction to be spontaneous, \Delta G

Given, \Delta H=-310.1\ kJ/mol=-310100\ J/mol

\Delta S=-89.00\ J/K.mol

So,

\Delta H-T\times \Delta S

Thus, applying values as:-

-310100-T\times (-89.00)

So, T = 3484.27 K

The conversion of T( °C) to T(K) is shown below:

T( °C)  = T(K) - 273.15  

So,  

T = (3484.27 - 273.15) K = 3211.12 K

<u>The temperature below which the reaction is spontaneous is:- 3211.12 K </u>

6 0
4 years ago
PLEASE HELP! MAJOR GRADE!
chubhunter [2.5K]

Answer:

A, B, and C are the correct answers.

Explanation:

The reason why solid, liquid, and gas are the most common of the elements because usually in school they teach you more about those 3 elements more than plasma ( from where I am ). Also, all of these states behave differently. Liquid is a substance that flows freely but is of constant volume, having a consistency like that of water or oil. Solid is firm and stable in shape. And gas is an air like substance. I'm not sure how to explain this more, it sounded better in my head. Hope this helped though!

5 0
3 years ago
Which of the following is true of gases
yuradex [85]

4?

Explanation:

i think its 4, i might be wrong.

7 0
3 years ago
Calculate the molecular mass of the element
marta [7]

Answer:

Na2SO4

2×23 + 32 + 4×16

46 + 32 +64

=142g

4 0
3 years ago
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