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Nady [450]
3 years ago
15

Lori’s family is on a road trip. They split their drive into the five legs listed in the table. Find the average velocity for ea

ch leg of the trip. Then arrange the legs of the trip from lowest velocity to highest.
A: 15 10
b:20 15
c: 24 12
d:36 9
d 14 14
Chemistry
1 answer:
lilavasa [31]3 years ago
7 0

Answer:

The answer is E,B,A,C,D

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8. What is the heat of reaction when hydrogen and oxygen combine to form water?
valina [46]

Answer:

The heat of reaction when hydrogen and oxygen combine to form water is :

<u>C. 571.6 kJ</u>

Explanation:

Enthalpy Change = The enthalpy change for the formation of 1 mole of the substance from their standard state is called the enthalpy of formation.

This is intensive quantity as it is fixed for 1 mole .

Intensive properties = Those properties which are independent on the amount of the substance are intensive properties.

The value of these quantities does not get halve if you divide the substance into two equal parts. example , density, refractive index.

However , the enthalpy of reaction is extensive. Because on increasing the amount the value of the enthalpy also get doubles

Hence for this reaction :

2H_{2}(g)+O_{2}\rightarrow 2H_{2}(l)

Its value is -285.8 kJ for 1 mole

And here two moles are present . so the value of molar enthalpy is:

-285.8 x 2 = -571.6 kJ

8 0
4 years ago
structures with all atoms in the same relative position to one another, but the distribution of electrons around them is differe
allsm [11]
<span>A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds; or through the sharing of electrons as in covalent bonds. The strength of chemical bonds varies considerably; there are "strong bonds" or "primary bond" such as metallic, covalent or ionic bonds and "weak bonds" or "secondary bond" such as Dipole-dipole interaction, the London dispersion force and hydrogen bonding.</span>
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An experiment is conducted using nitrogen monoxide and bromine reacted to form nitrosyl bromide. Calculate Keq for the reaction
Mkey [24]
The answer is Keq= .0891
5 0
3 years ago
Read 2 more answers
PLEASE NEED HELP QUICK DEADLINE SOON
Nadya [2.5K]

Answer:

D. Protons ; neutrons.

Explanation:

For a given element the number of protons is fixed, but the number of neutrons differ because the element usually consist of a number of isotopes.

For example Carbon has isotopes which contain 12, 13 and 14 neutrons.

So that is why you average the number of neutrons to find the approximate atomic mass..

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Explain how freezing point can be used to determine the molar mass of an unknown solute?
Furkat [3]
Everything freezes at different temperature
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3 years ago
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