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3 years ago

Although earth rorates on its axis as it orbits the sun what is true

1 answer:

4 0

Answer: Half of each hemisphere is lit, and the sunlight is centered on the equator. ... Earth's axis still points in the same direction, but now the North Pole seems to lean toward the Sun and is in sunlight. The June solstice marks the beginning of summer in the Northern hemisphere

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What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should

horsena [70]

Answer:

$J_{m} = 20$

$J_{m} = 22.5$

Explanation:

From the question we are told that

The first temperatures is $T_1 = 25^oC = 25 +273 =298 \ K$

The second temperature is $T_2 = 100^oC = 100 +273 = 373 \ K$

Generally the equation for the most highly populated rotational energy level is mathematically represented as

$J_{m} = [ \frac{RT}{2B}] ^{\frac{1}{2} } - \frac{1}{2}$

Here R is the gas constant with value $R =8.314 \ J\cdot K^{-1} \cdot mol^{-1}$

Also

B is given as $B=\ 0.244 \ cm^{-1}$

Generally the energy require per mole to move 1 cm is 12 J /mole

So $0.244 \ cm^{-1}$ will require x J/mole

$x = 0.244 * 12$

=> $x = 2.928 \ J/mol$

So at the first temperature

$J_{m} = [ \frac{8.314 * 298 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 20$

So at the second temperature

$J_{m} = [ \frac{8.314 * 373 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 22.5$

3 0

3 years ago

At what temperature will water change from a solid to a liquid (melt)?

lord [1]

Answer:

When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt.

8 0

3 years ago

Read 2 more answers

Gallium is a metallic element in Group III. It has similar properties to aluminium.

Liula [17]

Answer:

Gallium has Orthorhombic and forms ionic bonds with metals

Explanation:

The structure of gallium is Orthorhombic and it has a high neutron capture cross section. It is very stable in dry air but oxidizes in moist air. It reacts with oxygen to form Ga2O3. It has a valence of III. Its electronic configuration is

Ar 3d10 4s2 4p1

It is found in the 3A group of periodic table and it mostly forms ionic bonds with metal.

3 0

3 years ago

Why is the cell a basic unit of life?

Tju [1.3M]

Answer:

Cells make up the smallest level of a living organism such as yourself and other living things. The cellular level of an organism is where the metabolic processes occur that keep the organism alive. That is why the cell is called the fundamental unit of life.

Explanation:

put it in your own words

7 0

3 years ago

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In what ways do scientists not study the history of Earth's climate?

BARSIC [14]

(A) Studying ice cores

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3 years ago