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2 years ago

Explain why copper has a high thermal conductivity.

Chemistry

1 answer:

Katarina [22]2 years ago

7 0

Explanation:

So copper is a lattice of positive copper ions with free electrons moving between them.

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The flow of energy in an ecosystem starts with

levacccp [35]

From the sun, through the photosynthetic organisms which includes; green plants and algae, then to herbivores to carnivores and decomposers.

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8 0

3 years ago

When C3H8 burns completely in an excess of oxygen , the products formed are?

Marizza181 [45]

Water and carbon dioxide respectively

6 0

3 years ago

Please help thank you

maxonik [38]

Answer:

$K=1.7x10^{-3}$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by firstly setting up the equilibrium expression for the given reaction, in agreement to the law of mass action:

$K=\frac{[NO]^2}{[N_2][O_2]}$

Next, we plug in the given concentrations on the data table to obtain:

$K=\frac{(0.034)^2}{(0.69)(0.98)}\\\\K=1.7x10^{-3}$

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5 0

3 years ago

Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 21 ∘C∘C. Express the pressure

Volgvan

The question is incomplete, complete question is ;

A deep-sea diver uses a gas cylinder with a volume of 10.0 L and a content of 51.8 g of $O_2$ and 33.1 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 21°C.Express the pressures in atmospheres to three significant digits separated by commas.

Answer:

Partial pressure of the oxygen gas is 3.91 atm.

Partial pressure of the helium gas is 20.0 atm

Total pressure of the gases is 24.0 atm

Explanation:

Moles of oxygen gas = $n_1=\frac{51.8}{32 g/mol}=1.619 mol$

Moles of helium gas = $n_2=\frac{33.1 g}{4 g/mol}=8.275 mol$

Total moles of gas = $n_1+n_2=(1.619 +8.275 ) mole=9.894 mol$

Volume of the cylinder = V = 10.0 L

Total pressure in the cylinder = P = ?

Temperature of the gas in cylinder = T = 21°C = 21 + 273 K = 294 K

PV = nRT ( ideal gas equation )

$P=\frac{nRT}{V}$

$=\frac{9.894 mol\times 0.0821 atm L/mol K\times 294 K}{10.0 L}$

P = 23.88 atm ≈ 23.9

Partial pressure of the individual gas will be determined by the help of Dalton's law:

partial pressure = Total pressure × mole fraction of gas

Partial pressure of the oxygen gas

$p_{1}=P\times \chi_{1}=P\times \frac{n_1}{n_1+n_2}$

$p_1=23.88 atm\times \frac{1.619 mol}{9.894 mol}=3.91 atm$

Partial pressure of the helium gas

$p_{2}=P\times \chi_{2}=P\times \frac{n_2}{n_1+n_2}$

$p_2=23.88 atm\times \frac{8.275 mol}{9.894 mol}=19.97 atm\approx 20.0 atm$

6 0

3 years ago

Describe the three steps involved in producing crystals of the salt copper sulfate.

denpristay [2]

Answer:

Add copper (II) oxide (insoluble base), a little at a time to the warm dilute sulfuric acid and stir until the copper (II) oxide is in excess (stops disappearing) Filter the mixture into an evaporating basin to remove the excess copper (II) oxide. Leave the filtrate in a warm place to dry and crystallize.

7 0

3 years ago