Answer:
this is fairly simple if you have a periodic table with you.
Explanation:
atomic number 17 is Cl mass numer is 35.45 for protons neutron and electron you can just look that up on google. atomic number is where it is at on the periodic table and the mass number is in the little square at the bottom.
<h3>
Answer:</h3>
0.00245 moles of HCl
<h3>
Explanation:</h3>
We are given;
Volume of KOH = 9.71 mL
Molarity of KOH = 0.252 M
Volume of HCl = 15.0 mL
We are required to determine the number of moles of HCl
<h3>Step 1: Write the balanced equation for the reaction</h3>
The reaction between HCl and KOH is given by;
KOH(aq) + HCl(aq) → KCl(aq) + H₂O(l)
<h3>Step 2: Calculating the number of moles of KOH</h3>
Molarity = Moles ÷ Volume
Rearranging the formula;
Moles = Molarity × Volume
= 0.252 M × 0.00971 L
= 0.00245 moles
<h3>Step 3: Moles of HCl </h3>
From the equation, 1 mole of KOH reacts with 1 mole of HCl
Therefore, the mole ratio of KOH : HCl is 1 : 1
Thus,
Moles of HCl will be 0.00245 moles
Therefore, there are 0.00245 moles of HCl in the solution.
Explanation:
H2 (9) + 2 NOg) N20() + H20G)
H2 (M) NO (M) Rate (M*s)
Trial 1 0.30 0.35 2.835 x 10-3
Trial 2 0.60 0.35 1.134 x 10-2
Trial 3 0.60 0.70 2.268 x 10-2
a. What is the order with respect to H2?
Comparing trials 1 and 2,the concentration of H is doubled and that leads to an increase in the rate of the reaction by a factor of 4. This means the order with respect to H is 2.
b. What is the order with respect to NO?
Comparing trials 2 and 3, the concentration of NO is doubled and that leads to an increase in the rate of the reaction by a factor of 2. This means the order with respect to NO is 1.
c. What is the rate equation for this reaction?
rate = k [H]²[NO]
d. Calculate the rate constant for the reaction.
Taking trial 1;
rate = k [H]²[NO]
2.835 x 10-3 = k (0.30)² (0.35)
k = 90 x 10-3 = 0.09 L2 mol-2 s-1