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ANTONII [103]
2 years ago
10

What is the main idea of this paragraph? (The image gives you a hint...) Select an answer Carbon is the building block of the un

iverse. Smaller particles combine to make larger particles. Stars constantly grow from adding particles of the gas and dust from the nebulae. Stars make energy through fusion reactions and may eventually explode, making heavier of elements, larger particles, and releasing tremendous amounts of light energy.
Chemistry
1 answer:
Crank2 years ago
3 0

Answer:

give me brain lessssssssssssasss

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What class of compounds do fats belong to
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Fats are referred to as lipids, or cellular compounds that are insoluble in water.
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3 years ago
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Three different atoms or atomic cations with 3 electrons.
sveticcg [70]

Answer:

Li, Be^+, B^{2+}

Explanation:

To answer this question successfully, we need to remember that atoms are neutral species, since the number of protons, the positively charged particles, is equal to the number of electrons, the negatively charged particles. That said, we may firstly find an atom which has 3 electrons (and, as a result, 3 protons, as it should be neutral).

The number of protons is equal to the atomic number of an element. We firstly may have an atom with 3 protons and 3 electrons (atomic number of 3, this is Li).

Similarly, we may take the atomic number of 4, beryllium, and remove 1 electron from it. Upon removing an electron, it would become beryllium cation, Be^+.

We may use the same logic going forward and taking the atomic number of 5. This is boron. In this case, we need to remove 2 electrons to have a total of 3 electrons. Removal of 2 electrons would yield a +2-charged cation: B^{2+}.

6 0
2 years ago
The fossil record provides evidence of past life as well as clues to the past climate, environment, and abiotic factors in an ar
murzikaleks [220]
That is true because fossils can tell many things. 
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3 years ago
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18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?
Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

Solution

Mass of solution :

\tt mass~sugar+mass~water=12.45+100=112.45~g

Percent mass of sugar :

\tt \%mass=\dfrac{mass~sugar}{mass~solution}\times 100\%\\\\\%mass=\dfrac{12.45}{112.45}\times 100\%=11.07\%

6 0
2 years ago
Robert has 4 grams of a substance and Jill has 10 grams of the same substance. Which of the following statements is true?
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If Robert has 4 grams of a substance and Jill has 10 grams of the same substance <span>Jill's sample will weigh more than Robert's sample.</span>
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3 years ago
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