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3 years ago

If an atom has one valence electron, how will it form ions?

1 answer:

4 0

Lose 1 electron

It will give it to an atom with more electrons. For example, Lithium (which has 1 valence electron) would give it to an atom that has more than 4 valence electrons

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Toluene (C7H8) and nitric acid (HNO3) are used in the production of trinitrotoluene (TNT, C7H5N3O6), an explosive. C7H8 + HNO3 =

olga55 [171]

The mass in grams of nitric acid that is required to react with 454g C7H8 is 932.72 grams

calculation
find the moles of C7H8 used
moles = mass/molar mass

= 454 g/92 = 4.935 moles

balanced reacting equation

C7H8 +3 HNO3 = C7H5N3O6 +3 H20
by use of mole ratio between C7H8 to HNo3 which is 1:3 the moles of HNO3 =4.935 x3 = 14.805 moles

mass of HNo3 = moles x molar mass
= 14.805 x 63 = 932.72 grams

part B

the mass of C7H5N3o6 = 2045.5 grams

calculate the moles of C7H8
= 829 g/92 g/mol = 9.011 moles

by use of mole ratio between C7H8 to C7H5N3O6 which is 1:1 the moles of C7H5N3O6 is also = 9.011 moles

mass of C7H5N3O6 is therefore = moles x molar mass

=9.011 x227 = 2045.5 grams

8 0

4 years ago

What are some bad thing jellyfish do?

True [87]

Jellyfish aren't necessarily bad or do bad things humans do find that the tentacles that happen to "shock" or "electructe" people are bad. As well as the way jellyfish live in one grouping it is rare but you can find jellyfish out of a group, they do this that way they can eat and stay away from predators.

I hope this helped you!

3 0

3 years ago

Mitosis is an example of what

Phantasy [73]

Answer:

mitosis is Exampel of cell divison

Explanation:

mitosis is the second stage of cell divison or somatic cell divison

3 0

3 years ago

An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 300 nm and then immediately emits photon whose ass

KIM [24]

Answer:

The net energy is 2.196 eV

Explanation:

Basically, the energy of an atom increases when it absorbs a photon. In addition, the wavelength of the emitted photon is longer such that the atom absorbed a net energy in the process.

Using:

ΔE = h*c*(1/λ $_{1}$ - 1/λ $_{2}$ )

where:

ΔE is the net energy in eV (electron-volt). 1 eV is equivalent to 1.602* $10^{-19}$ J.

h = 4.135* $10^{-15}$ eVs

c = 3* $10^{8}$ m/s

λ $_{1}$ = 300 nm = 300* $10^{-9}$ m

λ $_{2}$ = 640 nm = 640* $10^{-9}$ m

Thus:

ΔE = 4.135* $10^{-15}$ eVs*3* $10^{8}$ m/s*( $\frac{1}{300*10^{-9}m } }-\frac{1}{640*10^{-9}m }$ )

ΔE = 4.135* $10^{-15}$ *3* $10^{8}$ *1.77* $10^{6}$ eV = 2.196 eV

6 0

3 years ago

what is a photoelectric?explain the terms ground state and excited state with the help of labelled diagram

brilliants [131]

Answer: Photoelectric is characterized by or involving the emission of electrons from a surface by the action of light.

Photoelectric effect is the emission of electrons when a radiation of frequency higher than the threshold frequency falls on the surface of an element. The substance which undergoes photoelectric effect is called as photoelectric.

Ground state is the state representing the lowest energy state.

Excited state is the state which represents a high energy state.

An electron in ground state absorbs energy to move to the excited state.

5 0

3 years ago