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2 years ago

Read the engineering box on The Noble Gasses. Why are noble gasses so stable and unreactive?

Chemistry

2 answers:

Aleksandr [31]2 years ago

8 0

They are so stable because they all have 8 valence electrons. please mark brainliest

Elan Coil [88]2 years ago

5 0

Answer:

Nobel gases are so stable and unreactive because that have a full outer ring of 8 ,or in case of helium 2, valance electrons,

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Which of the following has the same empirical and molecular formula?

White raven [17]

Answer:

O C4H8

Explanation:

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3 years ago

Write a word equation for the combustion of propane???<br> HELP????

frutty [35]

Answer:

1 mole of propane combines with 5 moles of oxygen gas to produce 3 mole of carbon dioxide and 4 moles of water.

Explanation:

The word equation for the combustion of propane can be obtained from the chemical equation;

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

The word equation is therefore:

1 mole of propane combines with 5 moles of oxygen gas to produce 3 mole of carbon dioxide and 4 moles of water.

For such a combustion reaction, carbon dioxide and water are produced in the process.

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3 years ago

For every 1lb you lose do to sweating you should consume ___ oz of water.

sdas [7]

Answer:

For every pound lost, replace it with 16 to 20 ounces of fluid

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2 years ago

What is the ph of 0.450 m al(no3)3 [ka for al3+(aq) = 1.00x10-5]? express your answer to two decimal places?

White raven [17]

Answer : The pH of the solution is, 2.67

Explanation :

The equilibrium chemical reaction is:

$Al^{3+}+H_2O\rightarrow Al(OH)^{2+}+H^+$

Initial conc. 0.450 0 0

At eqm. (0.450-x) x x

As we are given:

$K_a=1.00\times 10^{-5}$

The expression for equilibrium constant is:

$K_a=\frac{(x)\times (x)}{(0.450-x)}$

Now put all the given values in this expression, we get:

$1.00\times 10^{-5}=\frac{(x)\times (x)}{(0.450-x)}$

$x=0.00212M$

The concentration of $H^+$ = x = 0.00212 M

Now we have to calculate the pH of solution.

$pH=-\log [H^+]$

$pH=-\log (0.00212)$

$pH=2.67$

Therefore, the pH of the solution is, 2.67

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3 years ago

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kondor19780726 [428]

Answer:

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Explanation:

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3 years ago