24. Write the formula for the compound barium oxide.

Chemistry

2 answers:

Daniel [21]3 years ago

7 0

Answer:

the answer should be BaO

postnew [5]3 years ago

4 0

Answer:add me as a friend first and then you will get the answer

Explanation:

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The density of an unknown gas is found to be 4.12 g/L at standard temperature and pressure (STP). What is the molar mass of this

elena-s [515]

The molar mass of this gas is 92.3 g/mol

Calculation

By use ideal gas equation PV =nRT where
n=mole p=pressure V= volume R = gas constant T= temperature

n = mass /molar mass(MM)
substitute in the equation

PV =(mass/MM)RT
mass = density x volume(V)

Therefore PV =(density xV/ MM) xRT

divide both side by by V

P= (density/Mm) xRT

making MM the subject of the formula

MM = densityPRT

At STP = P= 1 atm, R= 0.0821 L.atm/Mol.k T = 273 K

MM is therefore = 4.12 g/l x 1 atm x 0.081 L.atm/mol.k x 273 K = 92.3 g/mol

7 0

3 years ago

Read 2 more answers

2p is the correct representation for the sub-shell with n = 2 and l = 1.

boyakko [2]

Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

s = 1 orbital

p = 3 orbitals

d = 5 orbitals

f = 7 orbitals

For n = 4

l = 0 to (n-1) = 0 to 3 = (4s , 4p , 4d , 4f)

Number of subshells = 4

Number of orbitals = 1 + 3 + 5 + 7 = 16

The maximum number of electrons the n = 4 shell can contain:

Each orbital can holds upto two electrons, then 16 orbitals will have :

$16\times 2=32$