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3 years ago

What element is this? How do you know?

1 answer:

4 0

Atom is the most basic unit of matter. They are the general term used to describe pieces of matter. But a different kind of atom makes up an element. A combination of atom of different elements creates a molecule. For example, you have water; it has a chemical formula of H2O. If you separate H from O, you have two atoms. Two atoms for hydrogen and one atom for oxygen. However, they are of different elements. And when you combine them to form H2O, you create a molecule.

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Calculate the equilibrium constant Kp for this reaction, given the following information (at 299 K ): 2NO(g)+Br2(g)⇌2NOBr(g)Kc=2

Travka [436]

Answer:

$2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)}$ , Kp = 0.08967

$2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)}$ , Kp = 2.3×10³⁰

Explanation:

The relation between Kp and Kc is given below:

$K_p= K_c\times (RT)^{\Delta n}$

Where,

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

$2NO_{(g)}+Br_2_{(g)}\rightleftharpoons2NOBr_{(g)}$

Given: Kc = 2.2

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2+1) = -1

Thus, Kp is:

$K_p= 2.2\times (0.082057\times 299)^{-1}$

Kp = 0.08967

For the second equilibrium reaction:

$2NO_{(g)}\rightleftharpoons N_2_{(g)}+O_2_{(g)}$

Given: Kc = 2.3×10³⁰

Temperature = 299 K

R = 0.082057 L atm.mol⁻¹K⁻¹

Δn = (2)-(2) = 0

Thus, Kp is:

$K_p= 2.2\times (0.082057\times 299)^{0}$

Kp = 2.3×10³⁰

3 0

3 years ago

How do the Earth, the moon and the sun interact?

marta [7]

Answer:

the sun helps the earth and the moon helps the earth as well

7 0

3 years ago

Read 2 more answers

Most of the deserts on the Earth are located around 30°N & 30°S latitude. This is because air is ( rising / sinking ) at the

pashok25 [27]

Answer: We live at the bottom of a gaseous envelope the atmosphere--that is bound gravity to the planet Earth. The circulation of our atmosphere is a complex process because of the Earth's rotation and the tilt of its axis. The Earth's axis is inclined 23.5° from the ecliptic, the plane of the Earth's orbit around the Sun. Due to this inclination, vertical rays of the Sun strike 23.5° N. latitude, the Tropic of Cancer, at summer solstice in late June. At winter solstice, the vertical rays strike 23.5° S. Latitude, the Tropic of Capricorn. In the Northern Hemisphere, the summer solstice day has the most daylight hours, and the winter solstice has the fewest daylight hours each year. The tilt of the axis allows differential heating of the Earth's surface, which causes seasonal changes in the global circulation. On a planetary scale, the circulation of air between the hot Equator and the cold North and South Poles creates pressure belts that influence weather. Air warmed by the Sun rises at the Equator, cools as it moves toward the poles, descends as cold air over the poles, and warms again as it moves over the surface of the Earth toward the Equator. This simple pattern of atmospheric convection.

3 0

3 years ago

A plant's growth response to water is called _____.

tamaranim1 [39]

Answer:

A or Hydrotropism

Explanation:

6 0

3 years ago

Which is true about each element in a period or horizontal row of the periodic table?

Ber [7]

The true about element in period or horizontal row of periodic table is

Each element has one more outer electron than the element before it. (answer B)

Explanation

In periodic table there are four horizontal rows(periods) that is period 1,2,3 and 4.

Across the period each element has one more electron than element before it.

For example Na and Mg which are in periodic 3.

Na has 2.8.1 or [Ne] 3s¹ electron configuration while Mg has 2.8.2 or [Ne] 3S² electron configuration.

Since Mg has 2 outer electrons while Na has 1 outer electron, Mg has more electron than Na.

3 0

3 years ago