Chapter 1: Essential Ideas
Chapter 2: Atoms, Molecules, and Ions
Chapter 3: Composition of Substances and Solutions
Chapter 4: Stoichiometry and Chemical Reactions
Mixed
100
What are the 3 states of matter?
Solids, liquids, gases
100
What is the name of this compound?
Fe(OH)3
Iron (III) hydroxide
100
How many atoms of Na are in 1 mole of sodium?
6.022x10^23 atoms
100
A reaction takes place in the lab with an initial temperature reading 38ºC and, after an hour, the temperature has dropped to 20ºC. Is this reaction exothermic or endothermic and what could be the sign of ΔH?
endothermic, ΔH = +
100
What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
m = 158g
200
What is the volume present in this graduated cylinder?
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~24.0 mL (also accepting 23.9 mL and 24.1 mL)
200
How many electrons does Polonium have if its mass is 209 and it has 125 neutrons?
84 electrons
200
A 3.2mol block of NaCl is dissolved in 4L of water. What is the molarity of the water?
0.8 M
200
Balance this equation:
___ NaOH + ___ H2CO3 ---> ___ Na2CO3 + ___ H2O
_2_ NaOH + _1_ H2CO3 ---> _1_ Na2CO3 + _2_ H2O
200
How many Cl atoms are in a 2.467 L solution of 8.451 M HCl?
1.255 x 10^25 Cl atoms
300
List out the diatomic elements
Br,I,N,Cl,H,O,F
300
What is Permanganic acid's chemical formula?
HMnO4
300
A sample of a compound was found to be 42.56% palladium (Pd mm = 106.42 g/mol) and 0.80% hydrogen. If the molar mass of the compound is 216.8 g/mol, what is the molecular formula of the compound?
Pd2H4
300
2 AgNO3 + H2SO4 ---> Ag2SO4 + 2 HNO3
If 307.3 grams of HNO3 are produced, how many grams of AgNO3 were reacted?
828.4 grams AgNO3 reacted
300
Given:
Actual yield = 5.98 g
Percent error = 10.5%
What is the theoretical yield?
6.68 g
400
Convert 7.8 x 10-3 m to micrometers
7800 µm
400
Explain how the gold foil experiment disproved the plum pudding model of the atom.
Rutherford's gold foil experiment in 1909 disproved Thomson's plum pudding model by showing that most of the atom is empty space, with a dense, positively charged nucleus. While most alpha particles passed straight through the foil, some were deflected or bounced back, indicating a different atomic structure. This led to the development of Rutherford's nuclear model of the atom.
400
A nurse preparing an IV solution takes 297 mL of 6.33 M Na₂CO₃ and dilutes to 3.37 M. Find the final volume.
558 mL
400
Balance the following equation:
___ Ca3(PO4)2 + ___ SiO2 + ___ C ---> ___ CaSiO3 + ___ CO + ___ P
_1_ Ca3(PO4)2 + _3_ SiO2 + _5_ C ---> _3_ CaSiO3 + _5_ CO + _2_ P
400
I have 345 mL of a 1.5 M NaCl solution. If I boil the water until the volume of the solution is 250 mL, what will the molarity of the solution be?
2.1 M
500
A solid has a mass of 3.12 grams and when placed in a graduated cylinder filled with water, it displaces the water from 23.5 mL to 32.4 mL. What is the density of the solid?
0.35 g/mL
500
58.10 amu
500
How many ml of liquid H2O can be produced from combusting 3.6 L of C4H10 gas?
14.5 mL
500
NH4NO3 + Na3PO4 ---> (NH4)3PO4 + NaNO3
Which reactant is limiting, assuming we started with 30.0 grams of ammonium nitrate and 50.0 grams of sodium phosphate. What is the mass of each product that can be formed? What mass of the excess reactant(s) is left over?
ammonium nitrate is limiting
18.6 grams of ammonium phosphate, 31.9 grams of sodium nitrate
29.5 grams of sodium phosphate
500
An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass (with units) that should be put on the periodic table for this element.
20.17 amu