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4 years ago

1

Chemistry

1 answer:

Marat540 [252]4 years ago

3 0

Answer:

The correct option is A) The light moths will be captured by predators more easily than the dark moths, and the population of dark moths will rise.

Explanation:

As we can see, the colour of the trees do not match with the light moths. Instead, the colour of the trees resembles the dark moths. This adaptation will work best for the dark moths to protect it from its predators. The light moths lack this adaptation and can easily be attacked by the predators. Hence, the population of the dark moth will increase as they are better adapted to live in such an environment.

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In creating a covalent bond, it would be best to bind oxygen to ______. carbon (C) argon (Ar) magnesium (Mg) aluminum (Al)

Sedaia [141]

Answer: In creating a covalent bond, it would be best to bind oxygen to carbon (C ).

Covalent bonds result from electron-sharing between two atoms. One carbon atom combines with two oxygen atoms. Thus, the carbon dioxide molecule has two C=O bonds. Carbon dioxide is a very common covalent bond.

3 0

3 years ago

Read 2 more answers

What is the function of the rough

bekas [8.4K]

A. build proteins

Explanation:

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins

4 0

3 years ago

What is the kinetic energy, in joules, of a molecule of carbon tetrachloride moving at a speed of 255 m s–1 (use the appropriate

hram777 [196]

Answer:

The kinetic energy of a molecule of carbon tetrachloride is 8.29 zJ.

Explanation:

The kinetic energy of a molecule of carbon tetrachloride is given by:

$K = \frac{1}{2}mv^{2}$

Where:

m: is the mass

v: is the speed = 255 m/s

To find the mass we need to find the molar mass for CCl₄, and use the Avogadro's number, knowing that in 1 mol of carbon tetrachloride we have 6.022x10²³ molecules:

A (C) = 12.011 g/mol

A (Cl) = 35.45 g/mol

The molar mass (M) of CCl₄ is:

$M = A (C) + 4*A (Cl) = 12.011 g/mol + 4*35.45 g/mol = 153.81 g/mol$

Now, the mass of 1 molecule of CCl₄ is:

$m = 153.81 \frac{g}{mol}*\frac{1 mol}{6.022 \cdot 10^{23} molecules} = 2.55 \cdot 10^{-22} g = 2.55 \cdot 10^{-25} kg$

Finally, the kinetic energy of a molecule of carbon tetrachloride is:

$K = \frac{1}{2}mv^{2} = \frac{1}{2}2.55 \cdot 10^{-25} kg*(255 m/s)^{2} = 8.29 zJ$

Therefore, the kinetic energy of a molecule of carbon tetrachloride is 8.29 zeptoJoule.

I hope it helps you!

6 0

3 years ago

You have an unknown quantity of oxygen at a pressure of 2.2 atam, a volume of 21 liters and a temperature of 87 Celsius. How man

laila [671]

Let's assume that the oxygen gas has ideal gas behavior.
Then we can use ideal gas formula,
PV = nRT

Where, P is the pressure of the gas (Pa), V is the volume of the gas (m³), n is the number of moles of gas (mol), R is the universal gas constant ( 8.314 J mol⁻¹ K⁻¹) and T is temperature in Kelvin.

P = 2.2 atm = 222915 Pa
V = 21 L = 21 x 10⁻³ m³

n = ?

R = 8.314 J mol⁻¹ K⁻¹

T = 87 °C = 360 K

By substitution,
222915 Pa x 21 x 10⁻³ m³ = n x 8.314 J mol⁻¹ K⁻¹ x 360 K
n = 1.56 mol

Hence, 1.56 moles of the oxygen gas are left for you to breath.

6 0

3 years ago

What kind of element has the greatest tendency to attract electrons?why?

amid [387]

The kind of element that has the greatest tendency to attract electrons are inert gases or noble gases, in the right side of the periodic table. It is because the nuclear charge is bigger for the elements in the right side of the periodic table, and inert gases or noble gases' atom is the best to attract electrons.

6 0

4 years ago