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fiasKO [112]
4 years ago
14

Why don't solids change shape?

Chemistry
1 answer:
borishaifa [10]4 years ago
6 0

Answer: B) the forces in the solid hold the atoms tightly in place

Explanation:This is because there is no room for the atoms to move around much and because they are very close together which makes the phase a solid.

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32 g of a metal, M, reacts with 8 g of oxygen to form an oxide. The formula of the oxide is MO. What is the atomic mass of M in
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Answer: M= 128 g/mol (Te is quite close)

Explanation: number of Oxygen moles is n = 8 g / 32 g/mol = 0,25 mol.

Because formula of oxide is MO, thus amount of metal is also 0,25 mol.

Because n = m/M , Molar mass of the metal M = m/n = 32 g /0.25 mol = 128 g/ mol

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Which of the following elements has the smallest atomic radius?
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How many atoms are in 4.5 g of gold? Answer in units of atoms.
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3 years ago
A 78.0 sample of gold at 175°C is put in a foam cup calorimeter with 25.0 g of water at 25.0°C. Calculate the specific heat of t
Nady [450]

The answer is the specific heat of the gold is 0.129 J/gC .

<h3>What is Calorimetry ?</h3>

It is an experimental method that allows one to calculate the heat change in a chemical process.

Calorimeter is just a reaction vessel. It could be a foam cup, a soda can, or a commercially available bomb calorimeter

Where q represents the heat change in the reaction, the calorimeter and the water. Since you are only measuring temperature, you will need to calculate the heat using it.

The change in heat of the gold is given by:

\rm q_{gold} = m c_{gold}\Delta T

=78 \times c_{p}\times (175-38.18)

The change in heat of the water is given by:

\rm q_{water} = mc_{p}\Delta T

m is the mass of water in the calorimeter in grams,

and delta T is the change in temperature.

where \rm c_{p} is the specific heat of water, which is 4.184 J/gC

mass of water =  25 g of water.

Temperature T₁ = 25°C

Final Temperature = 38.18 °C

Difference between temperature = 13.18 °C

\rm q_{water} = 25 \times 4.18\times 13.18

For a Foam Cup Calorimeter

\rm q_{water} = q_{cal}\\\\\\\rm 25\times4.18\times13.318 = 78 \times c_{p}\times (175-38.18)\\\\\\On \;solving\; this \;we \;get  \;c_{p} =  0.129

Therefore the  the specific heat of the gold is 0.129 J/gC

To know more about Calorimeter

brainly.com/question/4802333

#SPJ1

4 0
2 years ago
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