All categories

3 years ago

According to the bohr model of the atom which particles are allowed to exist, in any one of a number of a energy level

1 answer:

5 0

the line-emission spectrum of an atom is caused by the energies released when electrons. releases energy of only certain values.

You might be interested in

Which is an example of a chemical change

jonny [76]

The answer is baking a cake.

4 0

3 years ago

Read 2 more answers

A solid substance formed when two aqueous solutions are mixed is known as a

lys-0071 [83]

Answer:

b. precipitate is your answer

3 0

2 years ago

Read 2 more answers

True or false? Covalent molecules are formed when non-metal atoms share electrons with other non-metal atoms.

Tomtit [17]

Answer:

true

covalent bonds are between non metals and nonmetals. and they are sharing electrons.

7 0

3 years ago

Part 1: A cylinder containing 20.0 L of compressed nitrogen is connected to an empty (evacuated) vessel with an unknown volume.

baherus [9]

Answer:

The volume of the vessel is 250 L

Partial pressure of hydrogen = 189 torr

Explanation:

Using Boyle's law

${P_1}\times {V_1}={P_2}\times {V_2}$

Given ,

V₁ = 20.0 L

V₂ = ?

P₁ = 25 atm

P₂ = 2 atm

Using above equation as:

${P_1}\times {V_1}={P_2}\times {V_2}$

${25}\times {20.0}={2}\times {V_2}$

${V_2}=\frac {{25}\times {20.0}}{2}\ L$

${V_2}=250\ L$

The volume of the vessel is 250 L.

According to Dalton's law of partial pressure:-

$P_{H_2}=Mole\ fraction\times Total\ Pressure$

So, according to definition of mole fraction:

$Mole\ fraction\ of\ H_2=\frac {n_{H_2}}{n_{H_2}+n_{He}}$

Also,

Mole fraction of H₂ = 1 - Mole fraction of He = 1 - 0.75 = 0.25

So,

Total pressure = 756 torr

Thus,

$P_{H_2}=0.25\times 756\ torr$

Partial pressure of hydrogen = 189 torr.

7 0

3 years ago

Two glucose molecules are bonded together through a dehydration reaction to form a disaccharide called maltose. the molecular fo

Zina [86]

C12H22O11. If it is a dehydration reaction, there is a union of the two monosaccharides and a water molecule is lost. So double the C6H12O6, and remove an H2O, so C12H24O12 - H2O would yield C12H22O11.

4 0

3 years ago