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Marysya12 [62]
3 years ago
11

What type of physical change is it when a liquid turns into a solid and a solid turns into a liquid

Chemistry
1 answer:
goblinko [34]3 years ago
4 0

Answer:

Freezing and Melting (Fusion)

Explanation:

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From the dry desert of the south to the mountains of the north—Arizona has a varied topography. When residents of Phoenix visit
dedylja [7]

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The reason is because Flagstaff is at a higher elevation than Phoenix.

Explanation:

The air is thinner at higher elevations. You can google Flagstaff's elevation compared to Phoenix but the simple answer is that air is thinner at higher elevations and some people used to 'thicker' air find it harder to breath, especially after some strenuous exercise.

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2 years ago
What is the correct formula for combining Mg2+ and Br1+
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Answer: The correct formula is MgBr_2

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

Here magnesium is having an oxidation state of +2 called as Mg^{2+} cation and bromine Br^{-} is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral MgBr_2.

The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.

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2 years ago
What is the mass of a 300 ml sample of gaseous hydrogen chloride at 2.0 atm and 30c?
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Use PV = nRT
(2 atm)(.3 liters) = n(8.314 mol*K)(303°K)

.6 = n(2519.142)

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3 0
3 years ago
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