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How many significant figures are in the number 0.0000439200

Provide the name for the chemical shown below.   K2CO3

What is the bond order for the electron configuration shown below?

A spray can is used until it is empty except for the propellant gas, which has a pressure of 1,300. torr at 23 °C. If the can is thrown into a fire (T = 475 °C), what will be the pressure, in torr, in the hot can?

How many moles of aluminum are needed to make 9 moles of molecular hydrogen? Given the reaction: 2Al + 6HCl → 2AlCl3 + 3H2

Use the solubility rules to determine if K2SO4 is soluble or insoluble.

The number of neutrons tells you the                          of an atom.

After reacting 18.427 g HC2H3O2 with 18.442 g NaOH, 12.814 g of dried NaC2H3O2  were collected. What was the percent yield of the reaction (round your answer to just two significant figures)?   HC2H3O2 + NaOH –> NaC2H3O2 + H2O

EXTRA CREDIT: +4 points possible   A titration is performed using sodium hydroxide, NaOH, at a concentration of 0.1211 M to determine the concentration of a hydrochloric acid solution of unknown concentration. A volume of 10.00 mL of the hydrochloric acid solution is used in each trial. Using the balance chemical reaction and data table below, determine the concentration of the hydrochloric acid solution. HCl(aq) + NaOH(aq) –> NaCl(aq) + H2O(l) Concentration of NaOH 0.1211 M Volume of HCl used 10.00 mL Initial buret reading of NaOH 0.35 mL Final buret reading of NaOH 14.20 mL

Provide the name for the chemical shown below.   Mg(NO3)2