Examlex
A chemical reaction of the general type A 2B is first-order, with a rate constant of 1.52 *10¯4 s¯1.
A) Calculate the half-life of A.
B) Assuming the initial concentration of A is 0.067 mol L¯1, calculate the time needed for the concentration to fall to 0.010 mol L¯1.
Required
A condition or attribute indicating that a particular field, information, or action is mandatory.
LastName Field
A specific field in a database designated for storing the surname part of a person's name.
Short Text
A data type used in databases for fields that contain text or combinations of text and numbers, typically limited in length.
Database Accuracy
The extent to which data in a database is correct, up-to-date, and free of errors.
Q3: Crystal structures may be conveniently measured using<br>A)
Q21: What will be the effect of adding
Q31: Write the mass-action expression, Q<sub>c</sub>, for the
Q32: Identify the principal organic product of the
Q40: The radioactive isotope tritium decays with a
Q42: Which of the following statements about ceramics
Q54: A molecule with the formula AX<sub>2</sub> uses
Q62: Esters can be formed by the dehydration-condensation
Q75: At 850 <span class="ql-formula" data-value="\degree"><span
Q105: A solution of sodium acetate (CH<sub>3</sub>COONa) in