A student used a ruler to measure a pencil, as shown below: Which of the following measurements for this pencil is accurate?
55 mm
5 cm
45 mm
6 cm

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond