The half-life of the reaction is 101.9 min
<h3>First order reaction </h3>
When a reaction's pace and reactant concentration are inversely correlated, the process is known as a first-order reaction. To put it another way, the reaction rate doubles when the concentration does. One or two reactants can be present in a first-order reaction, as in the case of the decomposition process.
<h3>The half-life of first-order reaction:-</h3>
The amount of time it takes for the initial concentration of the reactant(s) to decrease by half is known as the half-life of a chemical reaction (abbreviated as "t1/2").
<h3 /><h3>Calculation:-</h3>
a→b
25% reacted means 75% remains
t=42 min
Rate constant
k=(2.303/t)(log a/a-x)
k=(2.303/42)(log 100/100-25 )
k=(0.054) (log 100/75)
k=(0.054)(0.1249)
k=0.0068 per min
half life
t1/2=(0.693/k)
=(0.693/0.0068)
=101.9 min
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The result when the OH- ions go as additional acid is added is that t<span>hey remain in solution but change concentration. </span>This is because when you add more acid to hydroxide, it will change its concentration due to the acidity added.
Sound is created by the vibrations of matter such as air. But theoretically if someone tried to make a sound in space where there is no matter, there would be nothing to vibrate so it wouldn’t make sound.
So no, sound needs matter to travel because sound itself is the vibration of matter.
All metals in the periodic table form metallic bonds. This includes every element in the
periodic table except those in the non-metal group. So elements that are
Polyatomic nonmetal, Diatomic nonmetal, Noble gas are those who DON'T FORM.
Answer: Silver, Rhenium, Lithium, <span>Bismuth </span>will form metal bonds.
1 mole Be ------------- 6.02x10²³ atoms
?? moles Be ---------- 3.93x10²⁰ atoms
1 x (3.93x10²⁰) / 6.02x10²³ =
=> 0.000652 moles