When matter is heated, particles within the matter will.
2 answers:
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Answer:
Approximately 1.9 kilograms of this rock.
Explanation:
Relative atomic mass data from a modern periodic table:
- Pb: 207.2;
- S: 32.06.
To answer this question, start by finding the mass of Pb in each kilogram of this rock.
89% of the rock is . There will be 890 grams of
in one kilogram of this rock.
Formula mass of :
.
How many moles of formula units in that 890 grams of
?
.
There's one mole of in each mole of
. There are thus
of
in one kilogram of this rock.
What will be the mass of that of
?
.
In other words, the in 1 kilogram of this rock contains
of lead
.
How many kilograms of the rock will contain enough to provide 1.5 kilogram of
?
.
Answer:
91.1835 nm
Explanation:
Given that the ionization energy of the oxygen molecule = 1314 kJ/mol
It means that
1 mole of oxygen molecules can be ionized by the energy = 1314 kJ = 1314000 J
1 mole of molecules contains 6.022 × 10²³ atoms
So,
6.022 × 10²³ atoms of oxygen molecules can be ionized by the energy = 1314000 J
1 atom require of energy
Energy =
Also
Where,
h is Plank's constant having value
c is the speed of light having value
is the wavelength
So,
Also,
So, wavelength = 91.1835 nm