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3 years ago

What are some genaral properties of gases that govern their behavior

Chemistry

2 answers:

dimulka [17.4K]3 years ago

8 0

Glass or anything that is breaking

NARA [144]3 years ago

3 0

Answer:

1. Gases may be compressed

2. Gases expand when less pressure is applied.

3. Gases can be mixed.

4. Gases exert a constant pressure on its container walls.

5. Gases have low densities.

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The mineral benitoite is a gemstone for making jewelry. It has a molecular weight of 413.44 grams/mole and a percent composition

Mila [183]

<h3>Answer:</h3>

Option-A (BaTiSi₃O₉)

<h3>Solution:</h3>

Step 1: Calculate Moles of each Element;

Moles of Ba = %Ba ÷ At.Mass of Ba

Moles of Ba = 33.21 ÷ 137.33

Moles of Ba = 0.241 mol

Moles of Ti = %Ti ÷ At.Mass of Ti

Moles of Ti = 11.58 ÷ 47.88

Moles of Ti = 0.241 mol

Moles of Si = %Si ÷ At.Mass of Si

Moles of Si = 20.38 ÷ 28.09

Moles of Si = 0.725 mol

Moles of O = %O ÷ At.Mass of O

Moles of O = 34.83 ÷ 16.0

Moles of O = 2.176 mol

Step 2: Find out mole ratio and simplify it;

Ba Ti Si O

0.241 0.241 0.725 2.176

0.241/0.241 0.241/0.241 0.725/0.241 2.176/0.241

1 1 3 9

Hence, Empirical Formula = BaTiSi₃O₉

Step 3: Calculating Molecular Formula:

Molecular formula is calculated by using following formula,

Molecular Formula = n × Empirical Formula ---- (1)

Also, n is given as,

n = Molecular Weight / Empirical Formula Weight

Molecular Weight = 413.44 g.mol⁻¹

Empirical Formula Weight = 137.33 (Ba) + 47.88(Ti) + 28.09 (Si₃) + 16 (O₉) = 413.48 g.mol⁻¹

So,

n = 413.44 g.mol⁻¹ ÷ 413.48 g.mol⁻¹

n = 1

Putting Empirical Formula and value of "n" in equation 1,

Molecular Formula = 1 × BaTiSi₃O₉

Molecular Formula = BaTiSi₃O₉

6 0

4 years ago

determine the type of the following chemical reaction: Mg(s) + 2HCl(aq)——-> H2(g) + MgCl2(aq) a. single replacement reaction

kumpel [21]

Answer:

a. single replacement reaction

Explanation:

Mg(s) + 2HCl(aq)——-> H2(g) + MgCl2(aq)

Mg replaces H, so this is a single replacement reaction.

4 0

3 years ago

An atom of helium has a radius of 31. pm and the average orbital speed of the electrons in it is about 4.4x 10 m/s Calculate the

otez555 [7]

The question is incomplete, here is the complete question:

An atom of helium has a radius of 31. pm and the average orbital speed of the electrons in it is about $4.4\times 10^6m/s$ . Calculate the least possible uncertainty in a measurement of the speed of an electron in an atom of helium. Write your answer as a percentage of the average speed, and round it to 2 significant digits

<u>Answer:</u> The percentage of average speed is 41 %

<u>Explanation:</u>

We are given:

Radius of helium atom = 31 pm = $31\times 10^{-12}m$ (Conversion factor: $1m=10^{12}pm$ )

So, diameter of helium atom = $(2\times r)=(2\times 31\times 10^{-12})=64\times 10^{-12}m$

The diameter of the atom will be equal to the uncertainty in position.

The equation representing Heisenberg's uncertainty principle follows:

$\Delta x.\Delta p=\frac{h}{2\pi}$

where,

$\Delta x$ = uncertainty in position = d = $64\times 10^{-12}m$

$\Delta p$ = uncertainty in momentum = $m\Delta v$

m = mass of electron = $9.1095\times 10^{-31}kg$

h = Planck's constant = $6.627\times 10^{-34}kgm^2/s^2$

Putting values in above equation, we get:

$64\times 10^{-12}m\times 9.1095\times 10^{-31}kg\times \Delta v=\frac{6.627\times 10^{-34}kgm^2/s}{2\times 3.14}\\\\\Delta v=\frac{6.627\times 10^{-34}kgm^2/s^2}{2\times 3.14\times 64\times 10^{-12}m\times 9.1095\times 10^{-31}kg}=1.81\times 10^6m/s$

To calculate the percentage of average speed, we use the equation:

$\text{Percentage of the average speed}=\frac{\text{Uncertainty in velocity}}{\text{Average orbital speed}}\times 100$

We are given:

Average orbital speed = $4.4\times 10^6m/s$

Putting values in above equation, we get:

$\text{Percentage of the average speed}=\frac{1.81\times 10^6m/s}{4.4\times 10^6m/s}\times 100\\\\\text{Percentage of the average speed}=41.\%$

Hence, the percentage of average speed is 41 %

3 0

4 years ago

Which phenomenon best explains the miscibility of heptane (CH3CH2CH2CH2CH2CH2CH3) in pentane (CH3CH2CH2CH2CH3)

Nuetrik [128]

The phenomenon that best explains the miscibility of heptane in pentane is that both are non-polar compounds.

<h3>Solubility of compounds</h3>

Solubility is defined as the ability of a solute or substance to dissolve in a given solvent and at a particular temperature.

Heptane is a straight-chain alkane hydrocarbon that contains 7 carbon atoms. It is a non polar solvent.

Pentane is also a straight-chain alkane hydrocarbon that contains 5 carbon atoms. It is also a non- polar solvent.

Both pentane and heptane are non-polar because the atoms in their molecules share electrons equally. They are able to dissolve each other because they are alike.

Learn more about solubility here:

brainly.com/question/23946616

6 0

2 years ago

How many degrees does the earth tilt

mart [117]

That would be 23.5 degrees

6 0

4 years ago

Read 2 more answers