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Rasek [7]
3 years ago
9

A large bar of solid gold is melted into liquid. The liquid is then poured into molds to make a number of gold coins. Was this a

chemical or physical change? Explain
Chemistry
1 answer:
Kobotan [32]3 years ago
8 0

Answer:

it's physical change because none of the components of the bar of solid have been tampered with so solid to liquid is physical change

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A rectangle has a volume of 395cm3. It has a mass of 147g. What is its density? *
LekaFEV [45]

The density of a rectangle : ρ = 0.372 g/cm³

<h3>Further explanation</h3>

Given

The volume of rectangle : 395 cm³

Mass : 147 g

Required

The density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume

Input the value :

ρ = 147 g : 395 cm³

ρ = 0.372 g/cm³

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arlik [135]

Answer:

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Explanation:

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