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TEA [102]
3 years ago
13

Which of the following describes a difference between galaxies and solar systems? A. Galaxies contain only moons, while solar sy

stems contain planets.
B. Gravity holds solar systems in orbits but does not exist between stars in galaxies. C. A galaxy is a collection of millions of stars, while a solar system is a star and the planets around it.
D. It's easier to use astronomical units to measure distances in the galaxy but use light years for measurements in a solar system.
Chemistry
2 answers:
nirvana33 [79]3 years ago
8 0
The correct answers should be C
Tomtit [17]3 years ago
8 0

<u>Answer: </u>The correct answer is Option C.

<u>Explanation:</u>

A galaxy is defined as the huge collection of gas, dust and billions of stars along with their solar system. All these systems are held together by the gravitational attraction. For Example: Milky Way.

A solar system is defined as the collection of a star, planets along with their moons, satellites of the planets, asteroids, meteoroids and comets. In the solar system planets revolve around the Star. For Example: Our Solar System has a star named Sun and eight planets revolve around it.

Hence, the correct answer is Option C.

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What type of bonding exists between the carbon atoms to create diamond ?
Step2247 [10]

Answer:

Covalent bonds.

Explanation:

Diamond is organized in a giant lattice structure with strong covalent bonds between carbon atoms. Each carbon atom forms 4 bonds. Explanation: Each carbon atom has four electrons in its outer shell, all of which form covalent bonds that are strong and hard to break.

5 0
3 years ago
Fulgurites are the products of the melting that occurs when lightning strikes the earth. Microscopic examination of a sand fulgu
BlackZzzverrR [31]

Answer:

Fe₃Si₇

Explanation:

In order to determine the empirical formula, we have to follow a series of steps.

Step 1: Determine the percent composition

Fe: 46.01%

Si: 53.99%

Step 2: Divide each percentage by the atomic mass of the element

Fe: 46.01/55.85 = 0.8238

Si: 53.99/28.09 = 1.922

Step 3: Divide all the numbers by the smallest one

Fe: 0.8238/0.8238 = 1

Si: 1.922/0.8238 = 2.33

Step 4: Multiply by numbers that make the coefficients whole.

Fe: 1 × 3 = 3

Si: 2.33 × 3 = 7

The empirical formula is Fe₃Si₇.

5 0
3 years ago
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Answer:

37.99681 g/mol

Explanation:

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