Quiz is similar to the mid-term exam chem103 ( Ahmad Albedawi & Obadah )
Chemistry Challenge: Mid-Term Review
Test your knowledge with our engaging chemistry quiz designed specifically for students preparing for the CHEM103 mid-term examination. This quiz includes a variety of questions that cover essential concepts in chemistry, from stoichiometry to molecular structure.
Featured Topics in the Quiz:
- Stoichiometry Calculations
- Molarity and Concentration
- Bonding and Molecular Geometry
- Properties of Elements and Compounds
A 3.38x10^5 mg of a cube of gold has density of 12.52g/cm^3 , calculate the length of cube .
27 cm
3cm
9cm
338cm
Calculate the molarity of cl- in 0.015M AlCl3 solution
0.015M
0.005M
0.060M
0.045M
How many IONS are there in three molecules of Ba3(PO4)2 .
3
6
9
15
A sample weights 6.7g contains K2CO3( M.W =138g/ml) required 20ml of 0.15M Hcl solution to neutrolize , calculate the mass% of K2CO3 in the sample || K2CO3 + 2HCl --> 2KCl+H2O+CO2
3.1%
12.4%
6.2%
1.55%
How many micrograms are there in 8000 nanograms
8 micrograms
8000000 micrograms
0.000008 micrograms
80 micrograms
The number of valence electron in Ca^+2 is :
8
0
1
2
The find of 0.0250360 should contain _______ significant figures
4 S.F.
5 S.F.
6 S.F.
8 S.F.
The number of bonding and nonbonding pairs of electrons respectively around Br atom in BrO3^-1
3,1
2,3
4,0
2,2
Which of the following is extensive property
Temperature
Pressure
Volume
Density
A 26ml of KoH solution required 18ml of 0.12M diprotic acid (H2A) to neutralize , calculate the molarity of KoH solution
0.042M
0.166M
0.083M
0.332M
How many grams of O2 remained at the end of the reaction || if 4g of NO reacted with 6g of O2 according to the following equation : (M.W - NO =30g/mol - O2 = 32g/mol ) - NO + 0.5O2 --> NO2
2.13g
1.87g
6 g
3.87g
Which of the following ionic compounds has the highest Lattice energy :
AlCl3
LiF
NaCl
MgO
CaO
How many ml of 0.13M HBr solution required to completely titrated with 20ml of 0.18M NaOH solution
14.4ml
20ml
27.7ml
34.4ml
The density of ccl4 is 1.60g/cm^3 at 25C , calculate the density in Kg/inch ( 1inch = 2.54 cm )
0.026
0.004
26.24
4.064
If 3.95g of NO2 was produced in the above reaction , calculate the %yield of NO2 || if 4g of NO reacted with 6g of O2 according to the following equation : (M.W - NO =30g/mol - O2 = 32g/mol ) - NO + 0.5O2 --> NO2
64.4%
36.2%
92%
46%
How many atoms are there in 0.25 moles of C3H8O
4.5 x 10^23
1.2 x 10^24
1.8 x 10^24
1.5 x 10^23
How many grams of C5H12 (M.W = 72g/mol ) required to produce 6.25g of CO2 (M.W=44) || C5H12 + 8O2 --> 5CO2 + H2O
19.1g
6.25g
0.766g
1.25g
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