Answer: an amount of space between two things or people.
Explanation: hope this helps? :)
Answer:
Explanation:
Cr₂O₃ ( chromium oxide )
Mass of Cr₂O₃⁻ = 2 x 52 + 3 x 16 = 104 + 48 = 152
152 gram chromium oxide contains 104 grams chromium
152 tonnes chromium oxide contains 104 tonnes chromium
5 tonnes chromium oxide contains 104 x 5 / 152 tonnes chromium
mass of chromium required = 104 x 5 / 152 tonnes
= 3.42 tonnes .
<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We calculate as follows:
</span>5.31×10^21 platinum atoms ( 1 mol / 6.022 x 10^23 atoms ) ( 78 grams / 1 mol ) = 0.6878 grams platinum
Answer:
The 2 represents, 2 oxygen atoms.
