A student heated a beaker containing a liquid over a yellow flame. After the beaker was removed the student noticed a black deposit on the underside of the beaker. What is the black deposit and where did it come from? What could the student do next time to avoid having the black deposit?
1. Suppose you wanted to measure the heat produced by a Bunsen burner flame. Why would holding a thermometer in…
Calculate the molar mass of an unknown compound based on the following data. A mixture containing 1.11g of the unknown compound and 6.66g of camphor froze at 166.1 degree C. Pure camphor has freezing point of 178.4 degree C and Kf=37.7 degree C kg mol
Description BR> When submitting grades in scientific notation, a number like 2300 would be 2.3e+3 or 0.0078 would be 7.8e-3. Remember entropy values are in units of joules.must convert to kJ in some problems IF any errors pop up and do sometimes, please let me know!! Instructions The sig fig checker has been turned off […]
The elements that occupy the spaces in the Periodic Table below have been assigned code letters A through Z. Use the information given to place the each code letter in its proper space.The following sets of elements are found in the same family {Z,R & D}; {S, I, P & F}; {X, E, J & […]
for each of the aluminum measurements calculate and record the following a total volume in the graduated cylinder of the water and metal b. net volume of the metal c. total mass of the metal d density of the metal started with balance of 54.0 30 ml of water added for total of 84.00 […]
Question 4 How many grams of KClO3 are needed to produce 9.484 moles of O2 in the reaction 2 KClO3 —> 2 KCl + 3 O2 Question 5 How many moles of NaCl are needed if we want to make 35.21 grams of PbCl2 by the reaction 2 NaCl + Pb(NO3)2 —> PbCl2 + 2 […]
Write the formula for an ionic compound formed from O^2- with each of the following ions: magnesium ion sodium ion aluminum ion
Lithium metal reacts with nitrogen gas in a synthesis reaction. How many grams of nitrogen are needed to react completely…
refer to the peridodic table. why are the average atomic mass of H thru Bi generally not whole numbers? why are Pu thru Und whole numbers? this is a good analogy of the relative abundances of different isotopes of the same element. what is wrong with this analogy? think about the isotopes used here and […]
