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elena55 [62]
3 years ago
10

HELP PLEASE! EASY! How many stars does the barred-spiral galaxy contain?

Chemistry
2 answers:
const2013 [10]3 years ago
6 0
A barred-spiral galaxy is estimated to have 200 - 400 billion stars in it, although it could have a s many as a a trillion.
Hope this helps! Don't forget Brainliest! :)
Zepler [3.9K]3 years ago
5 0
<span> Bars are found in approximately two-thirds of all spiral galaxies.</span>
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When heated, KCIO3 decomposes into KCl and O2
Oksana_A [137]

Answer:

Explanation:

First, the KClO3 moles is determined by using given grams of KCl produced from the reaction.

Next, the moles of O2 produced is obtained by using the moles of KClO3 which then, finally converted into mass of O2.

Analyzing the given chemical reaction clearly shows that, 2 moles of KClO3 produces 2 moles of KCl and 3 moles of O2.

From the given grams of KCl produced the initial grams of KClO3 used in the reaction is determined as follows,

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3 years ago
Which of these pairs indicates an incorrect coupling of reversible reactions?dehydration synthesis and hydrolysisanabolic and ca
Olegator [25]

Answer:

option C= hydrolysis and break down

Explanation:

All other three pairs are correct coupling of each others.

Option A= dehydration synthesis and hydrolysis

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In dehydration synthesis monomers combine through the covalent bonds and form large molecules. The large molecules are called polymers. The water as a byproduct also released when monomers joints together.

Hydrolysis:

In hydrolysis the polymers are break down into monomers by using water molecules. The catalysts are also required in this process.

Option B= Catabolic and Anabolic

Anabolic:

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For example simple glucose molecules join together to form large disaccharides.

Catabolic:

It is the break down of large complex molecules to the smaller molecules.

For example during cellular respiration sugar molecules break down and generate energy.

Option D=  Break down and synthesis

The break down and synthesis are also reverse pair of each others. The  synthesis involve the formation of molecules form smaller component while the break down involve destruction of molecules into smaller units.

8 0
3 years ago
Can someone write a hypothesis for this: Cigarette smoking increases the risk of lung cancer
Sholpan [36]

Answer: I believe/don't believe that smoking increases the risk of lung cancer because...(add your three reasons if writing an essay)

Explanation:

Since a hypothesis is basically your inference, these hypothesis can vary.

:) Hope this helped

6 0
4 years ago
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Answer:

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Hence, a model that can adequately show something that happens very slowly is the model for the formation of mountains.

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Which type of graph is best used to show how a measured quantity changes over time?
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Line graph; shows relationship between an independent and dependent variable. One example of an independent variable is time.
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