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nlexa [21]
3 years ago
9

A famous naval battle that was crucial in ending the Persian threat to the Greeks took place at

Chemistry
1 answer:
OverLord2011 [107]3 years ago
3 0
The answer is salamis
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How many nucleons are in an Iodine element? Okay
Lady_Fox [76]

Answer:

there are 74

Explanation:

3 0
2 years ago
The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.1 kj . f the change in e
TEA [102]

<u>Given:</u>

Change in internal energy = ΔU = -5084.1 kJ

Change in enthalpy = ΔH = -5074.3 kJ

<u>To determine:</u>

The work done, W

<u>Explanation:</u>

Based on the first law of thermodynamics,

ΔH = ΔU + PΔV

the work done by a gas is given as:

W = -PΔV

Therefore:

ΔH = ΔU - W

W = ΔU-ΔH = -5084.1 -(-5074.3) = -9.8 kJ

Ans: Work done is -9.8 kJ


6 0
3 years ago
What is a base?
aliya0001 [1]
The correct answer is A
its not D because a low pH is a acid
its not C because a base releases OH- ions
its not B because it donates and releases OH- ions

hope this helps
5 0
3 years ago
Read 2 more answers
How many moles of h2o are produced when using 7 moles of h2
Olenka [21]
1) Write the balaced chemical equation:

H2 + 2O2 → 2H2O

2) Infere the molar ratios:

1 mol H2 : 2 mol of water

3) Make the calculus as the direct proportion relation:

[2 mol H2O] / [1 mol H2] * 7 mol H2 = 14 mol H2

As you see you produce the double number of moles of H2O than number of moles of H2 used.

Answer: 14 moles 

6 0
3 years ago
Which type of matter has a definite composition througout and is made of more than on type of element
zvonat [6]

Answer:

Compound

Explanation:

It has a definite composition throughout and can be made of more than one type of element.

4 0
3 years ago
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