Methylpentane is held in a closed container at 150°f. both gas and liquid are present. what is the pressure in the container

The density of lithium is 0. 546 g/cm3. what volume is occupied by 3. 66 x 10 23 atoms of lithium?

s344n2d4d5 [400]

The volume occupied by 3.66 x $10^{23}$ atoms of lithium is 7.73 $cm^3$

<h3>What is Density?</h3>

The density of a substance is defined as the mass of the substance per unit volume. It is often denoted by the symbol ρ

The density of a substance is given by,

$\rho = \frac{m}{V}$

The mass of a substance is the measure of the amount of matter present in it. It is generally measured in grams (g) or kilograms (kg).

The volume of a substance is defined as the amount of 3D space occupied by it.

<h3>What is Mole Concept?</h3>

It is a concept which uses mole as a unit to measure the number of atoms, molecules or ions.

A mole is defined as the amount of substance which has the same number of elementary particles as there are atoms in 12 grams of $\ce{^{12}C}$

1 mole = Avogadro's number = 6.022 x $10^{23\\$ atoms

<h3>Steps to find out the volume</h3>

Molar Mass of Lithium = 6.94 g/mol

1 mole of Lithium has 6.022 x $10^{23}$ atoms

3.66 x $10^{23}$ atoms of lithium has molar mass = $\frac{6.94 g}{6.022\times10^{23} } \times 3.66 \times 10^{23}$

$m = 4.218 g$

Substitute in density formula,

$\rho = \frac{m}{V}$

$V = \frac{m}{\rho}$

$=\frac{4.218g}{0.546g/cm^3}$

= 7.73 $cm^3\\$

Therefore, 3.66 x $10^{23}$ atoms of lithium occupies 7.73 $cm^3\\$ of volume.

Learn more about the mole concept:

brainly.com/question/1427235

#SPJ4

3 0

2 years ago

A molecule has sp3 hybridization with 1 lone pair. The electron pair geometry of this molecule is:________ . The geometry of thi

DochEvi [55]

Answer:

Tetrahedral

Trigonal pyramidal

less than 109.5°

Explanation:

If a molecule has a hybridization of sp3 it must have four electron domains which corresponds to a tetrahedral geometry.

Now we were told that the molecule also has one lone pair. It means that one out of the four electron domains is composed of a lone pair. Thus the molecular geometry will be trigonal pyramidal (e.g NH3).

Recall that lone pairs usually decrease the bond angle to a value less than the expected value for that particular electron domain geometry.

The expected bond angle for a tetrahedral geometry is 109.5° but that of the trigonal planar geometry is less than this.

4 0

3 years ago

How do oceanographers define salinity?

Studentka2010 [4]

The oceanographers define salinity by the number of grams of salt per kilogram of water.

Salinity is illustrated as how much salt is present in the given amount of water. It is dependent upon how much salt is found in the ocean in the specific regions. If there is a sunny environment, it may evaporate an ample amount of water, and leave behind a lot of salt, thus, the water has more salinity.

The salinity of the ocean is usually measured in Practical Salinity Unit (PSU), it is a unit based on the characteristics of seawater conductivity.

3 0

4 years ago

Read 2 more answers

Which change is the best example of a physical change?

Ede4ka [16]

A physical change would be 3) ice cream melting. 1) and 2) are combustion reactions, which are chemical with oxygen, and 4) is an oxidation reaction, also with oxygen. A phase change, or melting, is not a chemical change but a physical one. Therefore 3) ice cream melting is the answer

3 0

3 years ago

Read 2 more answers

Put the steps in the process of photosynthesis in order

shepuryov [24]

Step 1-Light Dependent

CO2 and H2O enter the leaf

Step 2- Light Dependent

Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2

Step 3- Light Dependent

The electrons move down to enzymes

Step 4-Light Dependent

Sunlight hits the second pigment molecule allowing the enzymes to convert ADP to ATP and NADP+ gets converted to NADPH

Step 5-Light independent

The ATP and NADPH is used by the calvin cycle as a power source for converting carbon dioxide from the atmosphere into simple sugar glucose.

Step 6-Light independent

The calvin cycle converts 3CO2 molecules from the atmosphere to glucose

calvin cycle

The second of two major stages in photosynthesis (following the light reactions), involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate.

4 0

4 years ago