The building blocks of DNA are like alphabet letters, because they: : Are

The building blocks of DNA are like alphabet letters, because they: А: Are each associated with a particular sound B: Can be used in a variety of languages C: Each have an uppercase and a lowercase form D: Spell out different instructions depending on their order Help please

2 months ago

Solution 1

Guest Guest #5493024
2 months ago
The answer should be D since DNA is written in codes which can be rearranged like letters to a word

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Why do light-fur mice survive less often on dark rocks, compared to dark- figure mice?
Solution 1

Light-fur mice survive less often on dark rocks, compared to dark- figure mice because light - mice are easily seen by predators, while dark - figure are not easily seen by predators.

What is predator ?

Any species that preys on other animals and survives by killing and devouring them. Predators such as wolves and bears. Rabbit population is regulated by large carnivores.

Predators are living things that go for and kill prey. The term "prey" refers to the living things that predators eat. Both carnivores and omnivores may be predators. Predators including lions, tigers, sharks, and snakes.

Thus, Light-fur mice survive less often on dark rocks, compared to dark- figure mice because light - mice are easily seen by predators, while dark - figure are not easily seen by predators.

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Solution 2

Answer:

Light fur mice can be easily spotted by predators among the dark rocks

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How many moles of NH3 can be produced from 26.0 mol of H2 and excess N2 ? Express the number of moles to three significant figures.
Solution 1

17.3 moles of NH₃ were produced.

The reaction above talks about the production of ammonia NH₃

To solve this question, we'll begin by writing the balanced equation for the reaction between H₂ and N₂. This is illustrated below:

3H₂ + N₂ —> 2NH₃

From the balanced equation above,

3 moles of H₂ reacted to produce 2 moles of NH₃.

Therefore, 26 moles of H₂ will react to produce = (26 × 2)/3 = 17.3 moles of NH₃.

Thus, 17.3 moles of NH₃ were obtained from the reaction.

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Ammonia can be prepared using Haber process based on the following equation:

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Why do earthquakes occur more often in some countries than in others?
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Some places have more earthquakes than others because they sit on the edges of tectonic plates.

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Name and symbol for the first 20 elements.​
Solution 1

Answer:

H - Hydrogen

He - Helium

Li - Lithium

Be - Beryllium

B - Boron

C - Carbon

N - Nitrogen

O - Oxygen

F - Fluorine

Ne - Neon

Na - Sodium

Mg - Magnesium

Al - Aluminum

Si - Silicon

P - Phosphorus

S - Sulfur

Cl - Chlorine

Ar - Argon

K - Potassium

Ca - Calcium

Explanation:

Solution 2

Answer:1 Hydrogen H

2 Helium He

3      Lithium Li

4 Beryllium Be

5 Boron B

6 Carbon C

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8 Oxygen O

9 Fluorine F

10 Neon Ne

11 Sodium Na

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15 Phosphorus P

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17 Chlorine Cl

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Explanation:

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If you could count two atoms every second, how long would it take you to count a mole of atoms? Assume that you counted continually 24 hours every day. How does the time you calculated compare with the age of Earth. which is estimated to be 4.5 x 10 years old?​
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If we count two atoms every seconds, then the time taken to count one mole of atoms that is 6.02×10²³ atoms is 3.0×10²³ seconds. If we continually count the atoms it will take the time which is longer that the age of earth.

What is one mole of atoms?

Any substance that contains 6.02×10²³ atoms is called its one mole. this number that is, one mole of an atom is called the Avogadro number.

The time for counting two atoms is one second then the time to count 6.02×10²³ atoms is 6.02×10²³ /2 = 3.0×10²³ seconds.

One year have about 31556926 seconds. 3.0×10²³ seconds comprises 3.0×10²³  /31556926 = 9.53×10¹⁵ years. Age of earth is 4.5 × 10⁹ years.

Therefore, it will take longer time to count one mole of atoms than the age of earth.

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Solution 2

Answer:

It would take 9.54 x 10^15 years to count 1 mole of atoms which is 10^6 times the age of Earth.

Explanation:

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In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases of that substance coexist in thermodynamic equilibrium. It is that temperatureand pressure at which the sublimation curve, fusion curve and vaporisation curve meet.

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At the triple point, all three phases (solid, liquid, and gas) are in equilibrium. Since the triple point is a point, there is only one temperature and one pressure where the three phases will exist. This fact often helps in identifying compounds or in problem solving.

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