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3 years ago

What property can be used to tell the difference between two minerals, if they have the same hardness?

1 answer:

6 0

Some properties to differentiate between the minerals include:

Ductility
Malleability
Luster
Particle Size
Ability to react with chemicals
etc....

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What is the largest river basin in North Carolina?

Liula [17]

The french broad? idk sorry

6 0

3 years ago

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Exactly 1.0 mol N2O4 is placed in an empty 1.0-L container and is allowed to reach equilibrium described by the equation N2O4(g)

lora16 [44]

Answer: The value of equilibrium constant is 0.997

Explanation:

We are given:

Percent degree of dissociation = 39 %

Degree of dissociation, $\alpha$ = 0.39

Concentration of $N_2O_4$ , c = $\frac{1mol}{1L}=1M$

The given chemical equation follows:

$N_2O_4\rightleftharpoons 2NO_2$

Initial: c -

At Eqllm: $c-c\alpha$ $2c\alpha$

So, equilibrium concentration of $N_2O_4=c-c\alpha =[1-(1\times 0.39)]=0.61M$

Equilibrium concentration of $NO_2=2c\alpha =[2\times 1\times 0.39]=0.78M$

The expression of $K_{c}$ for above equation follows:

$K_{c}=\frac{[NO_2]^2}{[N_2O_4]}$

Putting values in above equation, we get:

$K_{c}=\frac{(0.78)^2}{0.61}\\\\K_{c}=0.997$

Hence, the value of equilibrium constant is 0.997

4 0

3 years ago

The concentration of the particles in the solid phase always remains the same regardless of how much quantity is present true or

Elan Coil [88]

The answer is true solid phase remains the same

3 0

3 years ago

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Which of the following statements about trash in the United States is FALSE? Each person produces about 2 kg of trash per day. T

andrew11 [14]

Answer:

There is nothing we can do to reduce the amount of trash we throw away.

Explanation:

We can reuse and recycle the trash that we throw away, so we can do something to reduce the amount of trash that we throw

4 0

2 years ago

Define the standard heat of formation of mgco3

Karo-lina-s [1.5K]

The standard heat of formation is the energy change that occurs when 1 mole of a substance is made from its elements in their standard states ( most stable form of the element at 1 bar of pressure and the specified temperature, usually 298 K or 25 degrees Celcius)
E.g for MgCO3
Mg (s) + C (s) + 3/2 O2 (g) = MgCO3

7 0

3 years ago