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Westkost [7]
3 years ago
7

What kind of change is a change in state of matter and why Physical or chemical

Chemistry
1 answer:
Maru [420]3 years ago
6 0

Answer:

physical

Explanation:

Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. I hope this helps. :)

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Calcium solid is placed in a solution of iron (III) chloride producing calcium chloride and iron solid
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Answer:

3Ca₍s₎ + 2FeCl₃ ------------------------------------------------------------->  3CaCl₂ + 2Fe₍s₎.

Explanation:

Iron(III) chloride is also known as Iron trichloride and it has the molar mass value of 162.2 g/mol and density of 2.9 g/cm³.

<em>The balanced equation for the chemical reaction between solid calcium and iron (III) chloride is given below as:  </em>

<em />

3Ca₍s₎ + 2FeCl₃ ------------------------------------------------------------->  3CaCl₂ + 2Fe₍s₎.

This kind of chemical reaction is known as <em>single displacement reaction or single replacement reaction. </em>

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Answer:

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Reducing sugars contain the -CHO group. If there is no colour change after the addition of Benedict's solution, then we can conclude that reducing sugars are absent.

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Help me with this chemistry question please.​
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Answer:

B) Because you are adding positively charged protons, which pull in the outer electrons.

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Since the increase in protons have a greater effect then the increase in electrons the protons pull the electrons in closer resulting the radius of an atom to decrease from left to right across a period.

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