Curious Carl lost the results of his chemistry lab on reaction rates. He and his partner added crushed antacid tablets to four solvents in 50 ml beakers. The temperatures of the solvents are displayed in the chart. Using your knowledge of kinetics and reaction rates, see if you can help Carl out and organize his data: 12 seconds, 45 seconds, 15 seconds, 32 seconds. How would you fill in the reaction time data, from top to bottom, in Carl's data table?

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.