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allochka39001 [22]
3 years ago
10

What is the name given to the tiny clump of positive material at an atom’s center

Chemistry
1 answer:
Mariana [72]3 years ago
7 0
The answer will be the Bohr model
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What is the name for CH 3 CH 2 COCHCH 3 CH(CH 3 ) 2 ?
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Answer:

Butanoic acid

Explanation:

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The IUPAC name for a given compound is Butanoic acid.

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In a chemical formula, what is used to indicate the number of atoms of each element?
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The coefficients next to the symbols of entities indicate the number of moles of a substance produced or used in the chemical reaction.
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How many milliliters of sterile water for injection should be added to a vial containing 5 mg/mL of a drug to prepare a solution
jonny [76]

Answer:

7mL of sterile water is the initial amount of the concentrated solution is 3mL

Explanation:

In this problem, the vial must be <em>diluted </em>from 5mg/mL to 1.5mg/mL, that means the solution must be diluted:

5mg/mL / 1.5mg/mL = 3.33 times

If the initial amount of the drug in the vial is 3mL, the final volume must be:

10mL

That means the volume of water that should be added is:

10mL - 3mL:

<h3>7mL of sterile water is the initial amount of the concentrated solution is 3mL</h3>
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3 years ago
What is the total mass of 2.0 moles of diatomic hydrogen?
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diatomic hydrogen is written as H2                                                                                (2.02 grams H2) <------- if each hydrogen atom is 1.01 grams, then two hydrogen atoms are 2.02 grams                                                                                                                  2.0 moles H2 X 2.02 grams H2                                                                                             ------------- (divide to cancel moles)   = 4.04 grams/mole H2 ÷ one mole = 4.04 grams H2

                                                          

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