Answer:
The fourth one down
Explanation:
It is the only setup in which the units of "cm" and "in" cancel correctly and give the desired units of "ft."
The second one down has the correct units but the wrong conversion factor for converting centimetres to inches.
Answer:
1 mole of Sn is required to react with 40 gram of HF
Explanation:
It is given that molar mass of HF is 20.01 g/mol
Mass of HF is 40 gram
So number of of HF is
Number of moles
When reaction between HF and Sn takes place
From the reaction it is clear that 1 mole Sn require 2 moles HF
Therefore 2 moles of HF require 1 mole Sn
Answer:
Explanation:
stoichiometry of C₂H₂ to H₂O is 2:2.
Number of moles of C₂H₂ = molar mass of C₂H₂
Since the molar mass of C₂H₂ is 26 g/mol.
Number of C₂H₂ moles reacted = 64.0 g / 26 g/mol = 2.46 mol.
according to a molar ratio of 2:2.
the number of H₂O moles formed = a number of C₂H₂ moles reacted.
Therefore the number of H₂O moles produced = 2.46 mol
H20= water or hydrogen do you times it and you will do density equals mass/volume