What is 2 AlBr3 + 3 K2SO4 --> 6 KBr + 1 Al2(SO4)3?
200
A child playing with an action figure (42g) in the tub accidentially drops the toy in the bath water and the water raises from 6L to 6.5L. This is the density of the toy in g/mL.
What is 0.084g/mL?
200
List the number of protons, neutrons, and electrons in Cr ^+4.
What is p =24 , n = 28, e =20?
200
Use the equation c= 3.00 x10^8m/s c=(wavelength)*v to solve the following equation. An electromagnetic wave is found to have a frequency of 8.34 x10^ -12 Hz. What is the speed of the wave?
What is 3.6x10^8 m/s?
200
Name the following compound H2SO3
What is sulfurous acid?
200
Identify the type of reaction: Pb + FeSO4 PbSO4 + Fe
What is single replacement?
300
Convert 5 um(micro meters) to km.
What is 5.0 x10^-9 km?
300
Two unknown compounds are tested. Compound I contains 15.0g of hydrogen and 120.0g of oxygen. Compound II contains 2.0g of hydrogen and 32.0g of oxygen. Are the compounds the same?why or why not?
What is no, don't have the same percent by mass?
300
The electron configuration for Aluminum.
What is 1s2 2s2 2p6 3s2 3p1?
300
draw the lewis dot structure in the correct geometric shape and determine the polarity of COH2. Electronegativities C-2.5 O-3.5 H-2.1
What is trigonal planar, polar?
300
Reactions between aqueous solutions can produce one of these three things.
What is water, gas, precipitate?
400
Determine the number of sig figs in 0.000450
What is 3?
400
Calculate the average atomic mass for Lithium – 6 that occurs 7.59% of the time and Lithium - 7 that occurs 92.41% of the time.
What is 6.939amu?
400
Which element would have the highest ionization energy a) the element in period 2, group 1 or b) the element in period 3, group 17
What is b?
400
Write the chemical equation for Niobium (III) Iodite
What is Nb(IO2)3?
400
Write the complete net ionic equation for the following equation: NaOH (aq) + CuCl2 (aq) -> NaCl (aq) + Cu(OH)2 (s)
What is 2NaOH (aq) + CuCl2 (aq) -> 2NaCl (aq) + Cu(OH)2 (s) (will check ionic)?
500
Complete the calculation and round to the correct number of sig figs. 8.00 / 1.666 + 7.2
What is 12.0?
500
Iodine-131 undergoes alpha and beta decay. Write the nuclear equation for this reaction.
What is (will check answers)?
500
Which element would be represented by [Kr]5s2 4d8
What is Palladium?
500
Explain what makes a compound an acid.
What is it donates H+ ions when dissolved in water?
500
Write the chemical equation predicting the products and then write the complete and net ionic: Mixing hydrosulfuric acid and aqueous calcium hydroxide produces two products.
What is H2S (aq) + Ca(OH)2 (aq) -> 2H2O (l) + CaS?