3 years ago

How is the melting point of a substance recorded

Chemistry

1 answer:

GrogVix [38]3 years ago

6 0

1. slowly heat stubstance.

2. once the substance is at the most liqued state take the temp. that's the melting point of that subtance.

hope that helps, any other questions feel free to DM me dont wate your points. :)

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how many liters of O2 are needed to produce 5.62 g of SO2 in the following reaction? 4FeS2+11O2 ->2Fe2O3+8SO2

Liula [17]

8moles of SO_2 need 11mol O_2

1mol need=11/8=1.4molO_2

Moles of sO_2

$\\ \rm\hookrightarrow \dfrac{5.62}{64}=0.1$

Moles of O_2

1.4(0.1)=0.14mol

We know

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3 years ago

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nydimaria [60]

The correct answer is true

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3 years ago

Water mixing with carbon dioxide from the air and changing the properties of limestone is an example of

mart [117]

It is an example of chemical weathering.
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3 years ago

Read 2 more answers

If the temperature changes in a chemical reaction, what has occurred?

bazaltina [42]

Answer:

Energy was transferred

Explanation:

If the temperature changed, energy must have been added or lost, but not created. Energy can't be created or destroyed.

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3 years ago

What is the density of Iodine gas at 2.36 atm and 65.0 C?

timurjin [86]

The density : 21.63 g/L

<h3>Further explanation</h3>

The gas equation can be written

$\large {\boxed {\bold {PV = nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

T = 65+273=338 K

P=2.36 atm

MW Iodine gas (I₂)=254

The density :

$\tt \rho=\dfrac{P\times MW}{RT}\\\\\rho=\dfrac{2.36\times 254}{0.082\times 338}=21.63~g/L$

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3 years ago