Complete question is;
When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,
A)the average kinetic energy of molecules increases.
B)the frequency of molecular collisions increases.
C)the rate constant increases.
D)the activation energy increases.
E)the order of reaction increases.
Answer:
B) The frequency of molecular collisions increases.
Explanation:
When we increase number of reactant molecules, the effective collision between the reactant molecules will form a product which also increases. As a result, the overall rate of the reaction will also increase which means the frequency of the molecular collision will also increase as well.
Thus, the correct answer is Option B
Answer:
0.74176 M HCl
Explanation:
1) Write out a balanced equation.
KOH + HCl --> KCl + H2O
2) Calculate #mol KOH in 76.0mL needed for the titration.
1.22 mol KOH in 1000mL
x mol KOH in 76.0mL
x = 0.09272 mol KOH
3) Use the balanced equation ratio (from step 1), 1 mol KOH : 1 mol HCl.
0.09272 mol KOH = 0.09272 mol HCl
4) 125mL of the HCl solution was used for the titration, so find the molarity.
0.09272 mol HCl is in 125mL
x mol HCl in 1000mL
x = 0.74176 mol HCL / 1 L
SO... 0.74176 M HCl is the answer.
*hope this helped*
- A Kind Stranger
Answer:
9028.8 J
Explanation:
The equation for working out the amount of thermal energy required is q = m c Δ T , where q is the amount of energy, m is the mass being heated up in grams, c is the specific heat capacity of what you're heating up in joules per gram per kelvin, and Δ T is the change in temperature in Kelvin.(Change in temperature will always give the same value,no matter Celsius or Kelvin)
mass = 27g, assuming specific heat capacity of water is 4.18 J/g*K, and the change in temperature is 90-10(=80) , the energy needed to raise : 80 × 27 × 4.18 = 9028.8 J
The balanced nuclear equations for the following:(a) β⁻decay of sodium-26 is Na²⁶₁₁ → Mg²⁶₁₂ + β₋₁⁰ + energy.
What is beta decay?
Beta decay (-decay) is a type of radioactive decay in nuclear physics in which a beta particle (fast energetic electron or positron) is ejected from an atomic nucleus, converting the original nuclide to an isobar of that nuclide. For example, beta decay of a neutron converts it into a proton by the emission of an electron accompanied by an antineutrino; or positron emission converts a proton into a neutron via the emission of a positron accompanied by a neutrino. The beta particle and its accompanying (anti-)neutrino do not exist in the nucleus before beta decay, but are generated during the decay process. Unstable atoms gain a more stable proton-neutron ratio through this process.
To learn more about beta decay visit:
brainly.com/question/28305263
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