Popular Problems
Rank Topic Problem Formatted Problem
1 Find the Number of Neutrons H
2 Find the Mass of 1 Mole H_2O
3 Find the pH 0.76M(HCl)(solution)
4 Find the Mass of 1 Mole H_2O
5 Balance H_2(SO_4)+K(OH)→K_2(SO_4)+H(OH)
6 Find the Mass of 1 Mole H
7 Find the Number of Neutrons Fe
8 Find the Number of Neutrons Tc
9 Find the Electron Configuration H
10 Find the Number of Neutrons Ca
11 Balance CH_4+O_2→H_2O+CO_2
12 Find the Number of Neutrons C
13 Find the Number of Protons H
14 Find the Number of Neutrons O
15 Find the Mass of 1 Mole CO_2
16 Balance (a+b/c)(d-e)=f
17 Balance CH_4+O_2→H_2O+CO_2
18 Balance C_8H_18+O_2→CO_2+H_2O
19 Find the Atomic Mass H
20 Determine if the Compound is Soluble in Water H_2O
21 Find the Electron Configuration Na
22 Find the Mass of a Single Atom H
23 Find the Number of Neutrons Nb
24 Find the Number of Neutrons Au
25 Find the Number of Neutrons Mn
26 Find the Number of Neutrons Ru
27 Find the Electron Configuration O
28 Find the Mass Percentages H_2O
29 Simplify fifth root of 243
30 Determine if the Compound is Soluble in Water NaCl
31 Find the Empirical/Simplest Formula H_2O
32 Find the Oxidation Numbers H_2O
33 Find the Electron Configuration K
34 Find the Electron Configuration Mg
35 Find the Electron Configuration Ca
36 Find the Number of Neutrons Rh
37 Find the Number of Neutrons Na
38 Find the Number of Neutrons Pt
39 Find the Number of Neutrons Be Be
40 Find the Number of Neutrons Cr
41 Find the Mass of 1 Mole H_2SO_4
42 Find the Mass of 1 Mole HCl
43 Find the Mass of 1 Mole Fe
44 Find the Mass of 1 Mole C
45 Find the Number of Neutrons Cu
46 Find the Number of Neutrons S
47 Find the Oxidation Numbers H
48 Balance CH_4+O_2→CO_2+H_2O
49 Find the Atomic Mass O
50 Find the Atomic Number H
51 Find the Number of Neutrons Mo
52 Find the Number of Neutrons Os
53 Find the Mass of 1 Mole NaOH
54 Find the Mass of 1 Mole O
55 Find the Electron Configuration H Be
56 Find the Electron Configuration Fe
57 Find the Electron Configuration C
58 Find the Mass Percentages NaCl
59 Find the Mass of 1 Mole K
60 Find the Mass of a Single Atom Na
61 Find the Number of Neutrons N
62 Find the Number of Neutrons Li
63 Find the Number of Neutrons V
64 Find the Number of Protons N
65 Evaluate 2+2
66 Simplify H^2O
67 Simplify h*2o
68 Determine if the Compound is Soluble in Water H
69 Find the Density at STP H_2O
70 Find the Oxidation Numbers NaCl
71 Find the Oxidation Numbers H_2O
72 Find the Atomic Mass He He
73 Find the Atomic Mass Mg
74 Evaluate (1.0*10^-15)/(4.2*10^-7)
75 Find the Number of Electrons H
76 Find the Number of Electrons O
77 Find the Number of Electrons S
78 Find the Number of Neutrons Pd
79 Find the Number of Neutrons Hg
80 Find the Number of Neutrons B
81 Find the Mass of a Single Atom Li
82 Find the Mass of 1 Mole H_2O
83 Find the Empirical Formula H=12% , C=54% , N=20 , ,
84 Find the Number of Protons Be Be
85 Find the Mass of 1 Mole Na
86 Find the Electron Configuration Co
87 Find the Electron Configuration S
88 Balance C_2H_6+O_2→CO_2+H_2O
89 Balance H_2+O_2→H_2O
90 Balance C_2H_6+O_2→CO_2+H_2O
91 Find the Electron Configuration P
92 Find the Electron Configuration Pb
93 Find the Electron Configuration Al
94 Find the Electron Configuration Ar
95 Find the Mass of 1 Mole O_2
96 Find the Mass of 1 Mole H_2
97 Balance CH_4+O_2→CO_2+H_2O
98 Find the Number of Neutrons K
99 Find the Number of Neutrons P
100 Find the Number of Neutrons Mg

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