The concentration of a solution may be expressed by all of the following except

ID: 3505908 • Letter: T

Question

The concentration of a solution may be expressed by all of the following except _________.

weight per volume

percentage

molarity

Oxygen has an atomic number of 8 and an atomic mass of 16. How many valence electrons does it have?

Which of the following describes a parasagittal plane?

any cut dividing the body into anterior and posterior portions

a transverse cut just above the knees

two cuts dividing the body into left and right halves

any sagittal plane except in the midline

Which of the following is a neutralization reaction?

NH3 + H+ NH4+2

HCl H+ + Cl-

HCl + NaOH NaCl + H2O

NaOH Na+ + OH-

The chemical properties of an atom are determined by its __________.

protons

electrons

neutrons

protons and neutrons

particles

weight per volume

percentage

molarity

1.pH

ph measures the number of H+ or OH- ions in a solution, not the concentration of the solution.

2.two

electronic configyration of oxygen (8) is 1s2 2s2 2p4

a completely filled p orbital have 6 electrons but oxygen lack 2 unpaired electrons

so valenncy of oxygen i s2

3.any sagittal plane except in the midline

The midsagittal plane is the specific sagittal plane that is exactly in the middle of the body.

4.HCl + NaOH NaCl + H2O

in neutrilization reaction salt and waterare formed as products.

5.electrons

electrons, determine many of the physical and chemical properties of atoms as they intract directly with other atoms or molecules

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