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3 years ago

What are some examples of gases at room temperature

Chemistry

1 answer:

Lady_Fox [76]3 years ago

6 0

Answer:

Nitrogen, Hydrogen, Oxygen, Chlorine, and Fluorine are all gases at room temperature.

Explanation:

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Classify the following as homogeneous or heterogeneous mixtures, or pure

victus00 [196]

Explanation:

Sugar - Pure substance

Magnesium Ribbon - Pure Substance

Vegetable soup Heterogeneous mixture

Bath oil - Homogeneous mixture

Tin of assorted biscuits - Heterogeneous mixture

Peanuts and raisins - Heterogeneous mixture

Copper wire - Pure Substance

Bicarbonate of soda (Baking soda) - Pure Substance

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2 years ago

Calculate the energy(J) change associated with an electron transition from n=2 to n=5 in a Bohr hydrogen atom. Put answer in sci

Oliga [24]

The energy at n level of hydrogen atom energy level =13.6/n^2

substiture the respective n values in the equation above and find the difference in the energy levels

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3 years ago

Read 2 more answers

Rank the following compounds in order of decreasing boiling point: potassium fluoride (KF), acetylene (C2H2), and formaldehyde (

otez555 [7]

Answer: $KF$ > $CH_2O$ > $C_2H_2$

Explanation:

The order of boiling point depends upon the type of interactions present between the molecules.

Potassium fluoride (KF) is an ionic compound and the opposite ions are held together by strong electrostatic forces.

$C_2H_2$ is a covalent compound and the molecules are held together by weak van der Waals' forces.

Formaldehyde is a polar compound due to presence of polar carbonyl group. Hence dipole-dipole force is present between formaldehyde molecules.

Thus the decreasing order of boiling point is:

$KF$ > $CH_2O$ > $C_2H_2$

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2 years ago

If there were only 4 protons, but the number of electrons remained at 6, what would the charge of this atom be? please help!!

lina2011 [118]

Answer:

Negatively charged

Explanation:

It could be an ion too. To balance the electron shell it could lose 1 or 2 electrons. If it is not an ion it won't lose atoms to balance the shells.

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2 years ago

Copper is a solid phase of copper still unknown to science. The only difference between it and ordinary copper is that Copper fo

Scrat [10]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The density is $\rho = 8.21479 g/cm^3$

Explanation:

From the question we are told that

the lattice constant is $a = 0.295 nm = 0.295*10^{-9} = 0.295*10^{-7} cm$

The density of Copper ( $\beta$ ) is mathematically represented as

$\rho = \frac{ZM}{a^3N_A}$

Where Z is the number of units in a unit cell and for BCC crystals Z =2

M is the molar mass of copper which same for Copper with a value of

$M = 63.5 g/mol$

$N_A$ is the Avogadro's constant with a value of $N_A = 6.022*10^{23}$

Substituting values

$\rho = \frac{2 *63.5}{(0.295*10^{-7})^3 * (6.022*10^{23})}$

$\rho = 8.21479 g/cm^3$

8 0

3 years ago