Where is the table?info given is not enough
Di- means 2 so 1 mole of 2 has 2 oxygen atoms
Answer:
C
Explanation:
5 moles of oxygen are needed to produce 1 mols of P4O10
x moles of oxygen are needed to produce 2 mols of P4O10
5/x = 1/2 Cross multiply
1*x = 2 * 5 Combine
x = 10
C
Answer:
HCl is the limiting reactant.
Explanation:
The reactant that yields the lesser number of moles of product is the limiting reactant
Number of moles of MnO2= mass of MnO2/ molar mass of MnO2
Number of moles= 37.7g/86.9368 g/mol= 0.4336 moles
From the reaction equation,
If 1 mole of MnO2 yields 1 mole of chlorine gas
0.4336 moles of MnO2 also yield 0.4336 moles of chlorine gas
For HCl
Number of moles of HCl= mass of HCl/ molar mass of HCl
Number of moles= 46.3g/36.46 g/mol = 1.27 moles of HCl
If 4 moles of HCl yields 1 mole of chlorine gas
1.27 moles of HCl will yield 1.27×1/4 = 0.3175 moles of HCl
Hence HCl is the limiting reactant.
<span>the electrons change their energy states and photons in visible spectrum (and infrared spectrum) are emitted.More the losses, more would be the light, but at the same time, more would be the heat generated.So
this necessitates that the metal used should have high resistivity (and
hence high losses), good thermmal conductivity and high melting point.
hope it helps
</span>
