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3 years ago

In an element’s square on the periodic table, the number with the greatest value represents the

Chemistry

1 answer:

sergey [27]3 years ago

6 0

Answer: D.atomic mass.

Explanation: The general representation of an element is given by: $_Z^A\textrm{X}$

X = chemical symbol of element

Z= atomic number= which represents the number of electrons.

A= mass number or atomic mass =which represents the number of electrons + number of neutrons

Thus mass number is greater than number of electrons and number of neutrons as it is the sum of both.

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Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures.N2(g) + O2(g) 2NO(g)The

yanalaym [24]

Answer : The correct option is, (E) 7.8 atm

Explanation :

The partial pressure of $N_2$ = 8.00 atm

The partial pressure of $O_2$ = 5.00 atm

$K_p$ = 0.0025

The balanced equilibrium reaction is,

$N_2(g)+O_2(g)\rightleftharpoons 2NO(g)$

Initial pressure 8.00 5.00 0

At eqm. (8.00-x) (5.00-x) 2x

The expression of equilibrium constant $K_p$ for the reaction will be:

$K_p=\frac{(p_{NO})^2}{(p_{N_2})(p_{O_2})}$

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

$0.0025=\frac{(2x)^2}{(8.00-x)\times (5.00-x)}$

By solving the terms, we get:

$x=0.15atm$

The equilibrium partial pressure of $N_2$ = (8.00 - x) = (8.00 - 0.15) = 7.8 atm

Therefore, the equilibrium partial pressure of $N_2$ is 7.8 atm.

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4 years ago

Ecological succession is

Serjik [45]

Ecological succession is the steady and gradual change in a species of a given area with respect to the changing environment. it is a predictable change and is an inevitable process of nature al all the biotic components have to keep up with the changes in our environment.

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3 years ago

If the heat capacity of an object is known, what other information will need to be known to calculate its specific heat capacity

zimovet [89]

Answer:

B. its temperature

Explanation:

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2 years ago

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What happens to the speed of motion of the particles of a gas when a certain volume of the gas is heated at constant pressure? E

Likurg_2 [28]

Answer:

As the gas is heated, the particles will begin to move faster. ... Because the gas remains at a constant pressure and volume, the particles cannot spread out so they simply move around the container even faster.

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3 years ago

Part 1. Find AHra for these chemical reactions. Tell if each is endothermic or exothermic.

strojnjashka [21]

Answer:

1 is ur answer

Explanation:

but add me on ps4 faded4_twenty

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3 years ago