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how many grams are in 2.00 mol of sodium chloride (NaCl)?
The enthalpy and entropy change of a reaction are -3.9 3.9kJ / mole and +56.6 J/mole K respectively at 250 C. What is the free energy change in kJ / mole ? Is this reaction always spontaneous, never spontaneous or does it depend on the temperature ?
6.02x10^-3 / 3.01x10^-2
Using the reaction on below:
Sn(s) + Pb²+ (aq) → Sn²+ (aq) + Pb(s)
a. Write the oxidation and reduction half reaction.
b. Construct a cell diagram.
c. Write the overall equation of the reaction.
d. Solve for the cell potential.
Calculate the boiling point and freezing point of a 1.7 m ethylene glycol solution.
1. When 10g of N2 and 7g H2 are allowed to react. Determine the limiting reactant and excess reactant in this reaction.
N_{2}+H_{2} ->NH_{3}
Given:
Find:
Solution:
TEST 2. PROBLEM SOLVING
Solve the problem below. Show your answers legibly, concisely, and completely. Use the back portion if necessary.
1. Determine the limiting reactant and excess reactant, when 36g of Al and 28.5g of HBr are reacted and how many grams of H_{2} gas are formed?
Al + HBr -> AlB*r_{3} + H_{2}
Given:
Find:
Solution:
Problem: If 68 g of Zn reacts with 27.5 g of HCl. Use the chemical equation to answer the following questions below.
Zn + 2HCl -> ZnC*l_{2} + H_{2}
1. What is the molar mass of Zn?
2. What is the molar mass of HCI?
3. What coefficient is indicated in HCI?
4. Which substance is limiting reactant?
5. Which substance is excess reactant?
6. What is the molar mass of ZnCl_{2} ?
from what alkene reactant might 3-methyl-3-pentanol be made?
How many aluminum atoms are in 4.22 g of aluminum?
