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Gnoma [55]
3 years ago
12

What is the aim of golden rain demonstration​

Chemistry
1 answer:
Andrei [34K]3 years ago
3 0

demonstrates the formation of a solid precipitate

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Which is the most active nonmetallic element in group 16?
timama [110]
Oxygen

For metals, reactivity increases as we move through the elements in the period table from top to bottom, and left to right. In contrast, for nonmetals, reactivity increases as we move through the elements in the periodic table, as we move from bottom to the top, and right to left. 

Group 16 on the periodic table is also called the oxygen family or chalcogens. It includes the following elements from top to bottom: Oxygen, Sulfur, Selenium, Tellurium, and Polonium. Of these, only Oxygen, Sulfur, and Selenium are nonmetals. Since reactivity of nonmetals increases going up the periodic table, oxygen is therefore the most reactive nonmetal in the group. Shown in the figure below is the reactivity trend in the periodic table.

5 0
3 years ago
In performing the "STEP TEST" for 3 minutes, what was your score (your count)? *
MAXImum [283]

Answer:

81

Explanation:

8 0
3 years ago
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Which of the following abilities is NOT a physical property of matter?
Morgarella [4.7K]

Answer:

Ability to react chemically with other substances is not a physical property.

Explanation:

The ability to dissolve in other substance can be both physical and chemical property.

It depend upon the type of solute, solvent and reaction between them.

For example, if NaCl is dissolved in water it gives sodium and chloride ions which are behaving different from the original compound. it will be chemical change but if water is evaporated it will give back sodium chloride and than it will be a physical change.

But if dissolved substances make the mixture not compound it will than a physical change, and solubility will consider a physical property.

Physical properties:

The properties which are not associated with change in chemical composition are called physical properties.                                                                                          

Example

Density, color, hardness, conductance, melting point, boiling points all  are physical properties.

Chemical properties:

The properties which are associated with change in chemical composition are called chemical properties.        

Example:

Toxicity, flammability, heat of combustion etc.

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) -------------------------------------> 2H 2O  (l)

8 0
3 years ago
Which process maintains homeostasis by replacing cells that die or get damaged? A. Cell division B. Cell respiration C. Exceptio
aleksandr82 [10.1K]

Answer:

Cell division

Explanation:

  • Cell division helps maintain homeostasis in living things since it creates new cells which can be used for growth and repair.
  • <em><u>Cell division occurs into two types, meiosis and mitosis . During mitosis, the cell creates two identical daughter cells that are identical to the parent cell, in terms of the number of chromosomes.</u></em>
  • These new cells are necessary to replace old cells that die in the organism, or to repair damage to the body.
7 0
3 years ago
At night, an equilibrium reaction between two different nitrogen compounds generates N2O5N2O5 in the atmosphere, as represented
kakasveta [241]

The breakdown of NO3 in the day leads to more consumption of N2O5 in the day hence its concentration is greater at night than in the day.

<h3>What is equilibrium constant?</h3>

The equilibrium constant is a number that shows how much reactants are converted to products in a reaction. It is often shown as capital letter K in English.

Given the situation described in the question, we know that the concentration of N205 will be higher at night, because the decomposition of NO3(g) in the daytime will result in an increase in the rate of consumption of N2O5(g) to reform NO3(g).

Learn more about equilibrium constant: brainly.com/question/17960050

3 0
2 years ago
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