An inactive area of a pixel covers 20% of a pixel.  What is the fill factor?

How many moles of hydrogen atoms are there in 0.250 mole of C2H6?

The compound Cr2O3 is named ________.

What is the classification for this reaction?2Na + 2HCl → 2 NaCl + H2

Which of the following correctly gives the correct coefficients for the reaction below?N2H4 + H2O2 → N2 + H2O

One mole of calcium phosphate, Ca3(PO4)2, contains ________ O atoms. Avagadro’s # is 6.022 x 1023 units in 1 mole.

 Now, by these confessions ’tis agreed that the devil has made a dreadful knot of witches in the country, and by the help of witches has dreadfully increased that knot: that these witches have driven a trade of commissioning their confederate spirits to do all sorts of mischiefs to the neighbors, whereupon there have ensued such mischievous consequences upon the bodies and estates of the neighborhood, as could not otherwise be accounted for…. This is a quotation from which of the following selections?    

Which of the following tissues attenuate the greatest quantity of radiation?

If SID is reduced by half, what must be done to mAs to maintain a constant density?

What effect will additional filtration have in regard to density on the radiograph?