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Nutka1998 [239]
3 years ago
7

Identify common signs that a chemical reaction has occurred

Chemistry
1 answer:
creativ13 [48]3 years ago
6 0

Answer:

The five conditions of chemical change are color change, the formation of a precipitate, formation of a gas, odor change, temperature change.

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Zoom all the way in to Daphne Major. Describe its appearance in two sentences.
kicyunya [14]
The Daphne Major is located in the Colon Archipelago. It has a crater composed of volcanic rocks. These rocks are made up from volcanic ashes which hardened over time. The volcano is shaped like a cone which is surrounded by trees and houses several rare birds. 
3 0
4 years ago
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How many molecules are in 4.62 moles of nitric acid (HNO3)?
Lena [83]

Answer:

2.8x10^24

Explanation:

To convert moles to molecules, multiply the number of moles by Avagadro's number (6.02x10^23. Round if required.

4.62mol × 6.02x10^23 = 2.8x10^24

6 0
3 years ago
When hydrogen peroxide (H2O2) is added to potassium iodide (KI) solution, the hydrogen peroxide decomposes into water (H2O) and
riadik2000 [5.3K]

Answer:

D. Catalyst

Explanation:

Because a Catalyst is a substance that causes or accelerates a chemical reaction without itself being affected.

5 0
3 years ago
How many electrons are present in outermost shell of argon atom​
sattari [20]

Answer:

there are 18 electrons in the outermost shell of argon atom

7 0
3 years ago
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Which element has a greater electronegativity?<br> fluorine (9) or radium (88)
emmainna [20.7K]

Answer:

Fluorine

General Formulas and Concepts:

<u>Chemistry</u>

  • Reading a Periodic Table
  • Periodic Trends
  • Electronegativity - the tendency for an element to attract an electron to itself
  • Z-effective and Coulomb's Law, Forces of Attraction

Explanation:

The Periodic Trend for Electronegativity is up and to the right of the Periodic Table.

Fluorine is Element 9 and has 9 protons. Radium is Element 88 and has 88 protons. Therefore, Radium has a bigger Zeff than Flourine.

However, since Radium is in Period 7 while Fluorine is in Period 2, Radium has more core e⁻ than Fluorine does. This will create a much larger shielding effect, causing Radium's outermost e⁻ to have less FOA between them. Fluorine, since it has less core e⁻, the FOA between the nucleus and outershell e⁻ will be much stronger.

Therefore, Fluorine would attract an electron more than Radium, thus bringing us to the conclusion that Fluorine has a higher electronegativity.

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3 years ago
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