Scientists
Which scientist quantified the relationship between pressure and air?
Robert Boyle
Convert the number of moles of ammonium chloride (NH4Cl) into grams.
0.436 moles of ammonium chloride
23.3 grams
__ Na + __ O2 ----> __ Na2O
4, 1, 2
What is the chemical formula of hydroxide?
OH-
Which scientist stated mass is neither created nor destroyed? What is this law called?
Antoine Lavoisier
The Law of Conservation of Mass
Convert the mass of sodium chloride (NaCl) into moles:
23.5 grams of sodium chloride
0.40 moles
__ Li + __ AlCl3 ----> __ LiCl + __ Al
3, 1, 3, 1
What is PO43-?
phosphate
What did Robert Millikan determine?
The charge of an electron
Ba(C2H3O2)2
255.3 grams
__ Al (OH)3 + __ H2CO3 ----> __ Al2(CO3)3 + __ H2O
2, 3, 1, 6
What is ClO2-?
chlorite
What did JJ Thompson hypothesize and what did he discover?
He hypothesized that atoms are made of a positively charged cloud, with negative electrons around it. He discovered the electron.
If we have 0.072 moles of FeCl3, how many grams are there?
11.7 grams
__ NH4OH + __ H3PO4 ---> __ (NH4)3PO4 + __ H2O
3, 1, 1, 3
What is the chemical formula for nitrate?
NO3-
What is Dalton's atomic theory?
(1) Elements consist of indivisible small particles (atoms).
(2) All atoms of the same element are identical; different elements have different types of atom.
(3) Atoms can neither be created nor destroyed.
(4) ‘Compound elements’ (i.e. compounds) are formed when atoms of different elements join in simple ratios to form ‘compound atoms’ (i.e. molecules).
If there are 9.6x10^15 particles of sugar in a solution then how many moles of sugar are there?
1.59 x 10^-8 moles
__ C6H6 + __ O2 ---> __ CO2 + __ H2O
2, 15, 12, 6
What is ClO4-?
perchlorate