What is the definition of chemical property?

2 answers:

5 0

Property or characteristic of a substance that can only be determined chemical if it is seen during a chemical change, and changes the properties and composition, not just a physical property like general shape

fenix001 [56]3 years ago

3 0

It is a type of property which is normally not visible but when it undergoes certain chemical reactions then this property is visible

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STatiana [176]

1. Igneous roc
2. Weathering & erosion
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5. Melting
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Hope this is helpful

8 0

3 years ago

Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas

Zinaida [17]

Answer: Number of molecules of hydrogen gas $6.32\times 10^{32}$

Explanation:

$2Na+2H_2O\rightarrow 2NaOH+H_2$

Number of moles of sodium = $\frac{\text{mass of sodium}}{\text{molar mass of sodium}}=\frac{48.7 g}{23 g/mol}=2.11mol$

According to reaction , 2 moles of sodium produces 1 mole of hydrogen gas , then 2.11 mol of sodium will= $\frac{1}{2}\times 2.11 mol$ of hydrogen gas that is 1.05 moles of hydrogen gas.