Answer:
Cu + HNO3 → Cu(NO3)2 + <u>H2O</u> + <u>NO2</u>
Cu + 4HNO3 → Cu(NO3)2 + <u>2H2O</u> + <u>2NO2 </u>(balanced equation)
Answer:
P waves is the correct answer
Answer:
HCl acts as an excess reagent
Explanation:
The reaction equation is;
PbO + 2HCl → PbCl2 + H20
Number of moles of PbO = 13g/223.2 g/mol = 0.058 moles
Since the mole ratio is 1:1, 0.058 moles of PbCl2 is produced
Number of moles of HCl = 6.4 g/36.5g/mol = 0.175 moles
2 moles of HCl yields 1 mole of PbCl2
0.175 moles yields 0.175 moles * 1/2
= 0.0875 moles of PbCl2
Hence; PbO yields the least number of moles of product so it is the limiting reactant and HCl is the reactant in excess
Answer: It will produce 40 chloride ions
Explanation: When in water, Calcium chloride separate in ions, as the following chemical equation:
CaCl₂ + H₂O ⇒
According to the equation, 1 calcium chloride results in 2 chloride ions, so if there are 20 units of the chemical compound, there will be 2 times as much Chlorine ions, i.e., 40 units of chlorine ions.
Answer:
1.76 x 10²²molecucles
Explanation:
Given parameters:
Mass of the sugar C₁₂H₂₂O₁₁ = 10g
Unknown:
Number of molecules = ?
Solution:
The number of molecules can be determined if we find the number of moles first.
Number of moles =
Molar mass of C₁₂H₂₂O₁₁ = 12(12) + 22(1) + 11(16) = 342g/mol
Number of moles = = 0.029mole
1 mole of C₁₂H₂₂O₁₁ will contain 6.02 x 10²³
0.029 mole of C₁₂H₂₂O₁₁ will be made up of 0.029 x 6.02 x 10²³
= 1.76 x 10²²molecucles