Show metadataprovide my evaluation of this resource in the recrytallization / melting point lab, there are a number of experimental details that need to be followed. choose whether the following statements are true or false.
the melting point apparatus should not be placed in a drafty location and should be protected from the effect of the room breeze.
in some melting point instruments, the sample is placed on a microscope slide which is then placed on top of a heated metal block, and the temperature of the metal block is raised until melting is observed.
if the sample to be melted were placed on a microscope slide then heated, finger oils on the microscope slide will lower the melting point.
a slow heating rate is necessary near the expected melting point if a mercury or alcohol thermometer is used in a melting point determination, a fractional degree reading should be possible with careful observation.

What three natural resources are found in the great lakes region

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum