There are many examples of collaboration in the scientific world. Which statement describes one of those examples?

A gas mixture with a total pressure of 765 mmHg contains each of the following gases at the indicated partial pressures: 134 mmH

ladessa [460]

Answer: c

Explanation:

4 0

4 years ago

what modifications to either or both of the half-cell reactions would kim need to make if she wanted to use them to produce equa

kompoz [17]

We have to add the both half cell equations and eliminate the number of electrons lost/gained.

<h3>What modification must Kim make to the equations?</h3>

The term redox reaction is a type of reaction that occurs when an electron is lost or gained in a reaction system. We can see that in this reaction, zinc looses two electron which are gained by copper.

If we want to obtain the equation 4.9 which is the overall equation of the redox reaction from the various half cell equations then we have to add the both half cell equations and eliminate the number of electrons lost/gained.

Learn kore about redox reaction:brainly.com/question/13293425

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7 0

2 years ago

Where was the most deposition of sediment take place

zaharov [31]

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7 0

3 years ago

The density of potassium, which has the BCC structure, is 0.855 g/cm3. The atomic weight of potassium is 39.09 g/mol. Calculate

Delicious77 [7]

Answer:

For a: The edge length of the crystal is 533.5 pm

For b: The atomic radius of potassium is 231.01 pm

Explanation:

For a:

To calculate the lattice parameter or edge length of the crystal, we use the equation:

$\rho=\frac{Z\times M}{N_{A}\times a^{3}}$

where,

$\rho$ = density = $0.855g/cm^3$

Z = number of atom in unit cell = 2 (BCC)

M = atomic mass of metal = 39.09 g/mol

$N_{A}$ = Avogadro's number = $6.022\times 10^{23}$

a = edge length of unit cell = ?

Putting values in above equation, we get:

$0.855=\frac{2\times 39.09}{6.022\times 10^{23}\times (a)^3}\\\\\a=5.335\times 10^{-8}cm=533.5pm$

Conversion factor: $1cm=10^{10}pm$

Hence, the edge length of the crystal is 533.5 pm

For b:

To calculate the edge length, we use the relation between the radius and edge length for BCC lattice:

$R=\frac{\sqrt{3}a}{4}$

where,

R = radius of the lattice = ?

a = edge length = 533.5 pm

Putting values in above equation, we get:

$R=\frac{\sqrt{3}\times 533.5}{4}=231.01pm$

Hence, the atomic radius of potassium is 231.01 pm

4 0

3 years ago

Pure elemental gases, such as O2 and N2, have very low melting points. At around -220°c. What is one reason that this is the cas

Elanso [62]

Pure elemental gases like oxygen and nitrogen have extremely low melting values of about -220 degrees Celsius because pure gases are nonpolar and only covalently linked. The intensity of intermolecular interactions between molecules determines a substance's melting point.

Which gases make up the elements?

The pure gases element group, includes hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), and noble gases At normal pressure and temperature, the following gases are present: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) (STP).

Which four types of gases are important?

A four-gas monitor, which measures the four principal gases oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), and methane (CH4), can safeguard the employees in any setting (CH4).

Learn more about gases here:

brainly.com/question/1369730

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3 0

2 years ago