A student is observing a chemical reaction occurring with visible bubbling. The bubbling eventually stops. The student can see that some of the original reactants are still intact inside the beaker, so he knows that not all the reactant has been used up. Therefore, the student knows he is now observing:
A. A failed reaction.
B. Equilibrium.
C. A decrease in temperature.
D. A completed reaction.
Which of the following is the atomic mass of an atom containing 31 protons 31 electrons and 37 neutrons?
A. 62
B. 68
C. 70
D. 99
Fe + CuSO4 -> FeSO4 + Cu is an example of what type of reaction?
A. Single Replacement
B. Combustion
C. Double Replacement
D. Decomposition
Which of the following creates a cramping sensation during intense exercise?
A. Glucose
B. Pyruvate
C. Lactate
D. Protein
DNA is made up of which of the following nucleotides?
A. Adenine, Guanine, Cytosine, and Thymine
B. Uracil, Adenine, Guanine, and Thymine
C. Amenine, Cytosine, Galvine, Thymine
D. Ribose, Phosphate, Pentose, and Amine
What is the total number of sulfur atoms represented in 3Ca(SO4)3?
A. 3
B. 4
C. 6
D. 9
The pH scale ranges from 0 to 14, where 0 is more _____ and 14 is more ______.
A. basic, acidic
B. neutral, acidic
C. acidic, neutral
D. acidic, basic
Glycolysis results in a net gain of how many ATP molecules?
A. 0
B. 1
C. 2
D. 4
Fluorine, oxygen, and nitrogen would each form what type of bond with a hydrogen atom?
A. Polar bond.
B. Covalent bond.
C. Hydrogen bond.
D. All of the above.
Which of the following is an example of an ionic bond?
A. NaCl
B. OH
C. H3O+
D. COO-
Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only Health Educational Systems exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your HESI exam preparations and Health Educational Systems certification application, do not hesitate to visit our Vcedump.com to find your solutions here.