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jolli1 [7]
3 years ago
6

I need help with the one with the pen on it

Chemistry
2 answers:
Setler [38]3 years ago
5 0
<span>The human body is organized at different levels, starting with the cell. Cells are organized into tissues, and tissues form organs. Organs are organized into organ systems such as the skeletal and muscular systems.</span>
Pavel [41]3 years ago
5 0
Q: What is the job of your heart?
A: Your heart is sort of like a pump, or two pumps in one. The right side of your heart receives blood from the body and pumps it to the lungs.


Answered this just to help out. I seen that your question was answered.
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When an oxygen atom is attached to a carbon atom the carbon atom becomes more?
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When an oxygen atom is attached to a carbon atom, the carbon atom becomes reduced.
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Which two of the following elements would you expect to be most similar: nitrogen, chlorine, barium, fluorine, and sulfur? 
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Stomach acid is approximately 0.10 M HCl. How many mL of stomach acid can be neutralized by one regular antacid tablet that cont
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Answer:

100 mL

Explanation:

The reaction that takes place is:

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First we <u>convert 500 mg of CaCO₃ into mmoles</u>, using its <em>molar mass</em>:

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Then we <u>convert 5 mmoles of CaCO₃ into HCl mmoles</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:

  • 5 mmol CaCO₃ * \frac{2mmolHCl}{1mmolCaCO_3} = 10 mmol HCl

Finally we <u>calculate the volume of a 0.10 M HCl solution (such as stomach acid) that would contain 10 mmoles</u>:

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3 years ago
Which of the following compounds are held together by ionic bonds? Water, salt, sugar, carbon dioxide
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Answer:

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Salt=NaCl

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