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2 years ago

14

Balance this chemical equation. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici

ent is "1."
Choose... H 2 O 2 → Choose... H 2 O + Choose... O 2

1 answer:

larisa86 [58]2 years ago

8 0

The first one have a nice day and good luck

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What is the formula for tetrasulfur hexabromide<br><br>If you answer I will give you a brainliest

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Tetrasulfur Dinitride S4N2

Tetrasulfur pentoxide S4N4

Tetrasulfur tetranitride N4S4

Tetrasulfur pentoxide S4N4

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2 years ago

As the atmospheric pressure decreases, the temperature at which water will boil

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As the atmospheric pressure decreases, the temperature at which water boils decreases too. An increase in pressure leads to an increase in boiling point while a decrease in pressure leads to a decrease in boiling point.

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2 years ago

the value of kc for the following reaction is 0.630 at 409 K N2O4(g) --> 2NO2(g) if a reaction vessel at that temperature int

stealth61 [152]

<u>Answer:</u> The concentration of nitrogen dioxide at equilibrium is 0.063 M

<u>Explanation:</u>

We are given:

Initial concentration of nitrogen dioxide = 0.0250 M

Initial concentration of dinitrogen tetraoxide = 0.0250 M

For the given chemical equation:

$N_2O_4(g)\rightleftharpoons 2NO_2(g)$

<u>Initial:</u> 0.025 0.025

<u>At eqllm:</u> 0.025-x 0.025+2x

The expression of $K_c$ for above equation follows:

$K_c=\frac{[NO_2]^2}{[N_2O_4]}$

We are given:

$K_c=0.630$

Putting values in above expression, we get:

$0.630=\frac{(0.025+2x)^2}{(0.025-x)}\\\\x=-0.2013,0.019$

Neglecting the negative value of 'x', because concentration cannot be negative

So, equilibrium concentration of nitrogen dioxide = (0.025 + 2x) = [0.025 + 2(0.019)] = 0.063 M

Hence, the concentration of nitrogen dioxide at equilibrium is 0.063 M

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2 years ago

A. What is a period on the periodic table?

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Answer:

In chemical bonding: Arrangement of the elements. The horizontal rows of the periodic table are called periods. Each period corresponds to the successive occupation of the orbitals in a valence shell of the atom, with the long periods corresponding to the occupation of the orbitals of a d subshell.

Explanation:

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