Md-term exam | Ahmad Albedaw & Obadah Alzoubi |
Mid-Term Chemistry Exam Quiz
Test your knowledge with this exciting mid-term chemistry exam quiz designed for students looking to prepare for their upcoming assessments. Challenge yourself on a variety of topics, from stoichiometry to molecular structures, and more.
Featuring:
- 20 engaging multiple-choice questions
- Score points for correct answers
- Instant feedback on your performance
Copper (Cu) has a density of 7.96 g/cm³ at 25 °C. What is the volume (L) of 112.3 g of Cu?
0.14
0.0141
14.1
14.1
How many grams of C are there n 55g of C2H5O6 ( 125g/mol ) ?
10.56
11.56
9.56
8.56
Each oxygen atom (O) in the Lewis structure of O2 molecule is surrounded by:
4 pairs of electrons, 1 bonding and 3 non-bonding.
pairs of electrons, 2 bonding and 2 non-bonding.
4 pairs, all bonding
4 pairs of electrons, 3 bonding and 1 non-bonding.
A 19.1 mL of a 0.875 M K2O solution is added to 66.1 mL of 0.65 M K3N. What is the concentration of K+ ion in the final solution?
1.9
2.6
20
19
The correct order of increase lattice energy is ...........
SrSe < KI < FrBr
KI < SrSe < FrBr
KI < FrBr < SrSe
FrBr < KI < SrSe
Beryllium reacts with a certain element to form a compound with the general formula Be3X2. What would the most likely formula be for the compound formed between Aluminium and element X?
AlX
Al2X3
Al3X2
Al3X
A 55-gram sample of C3H7O4 ( 104 g/mol ) contains ............... Atoms of H
3.7
22.29 x 10^23
0.53
3.18 x 10^23
How many grams of Mg(OH)2 (58.3 g/mol) are present in 500mL of 0.200 M solution of Mg(OH)2?
5.83
3.2
9.4
7.3
For the reaction 3A + 5B + 5C + 3Z → 3E + D, if equal moles of A, B ,Z and C are allowed to react in a flask, then at the end of the reaction, the flask contains:
Cannot determine
A, Z, E and D
Both E and D
A, E and D
Which of the following has the lowest boiling point ?
Na3N
BeO
Cs2Se
Rb2Se
Predict the empirical formula of the ionic compound that forms from potassium with oxygen
KO2
K2O
KO
K2O2
Electronegativity ............. From bottom to Top within a group and ............... From right to left within a period
Increase , Decrease
Increase ,Increase
Decrease , Decrease
Decrease ,Increase
How many resonance structures can be drawn for NO3–?
1
2
3
4
5
6.00 ng/cm3 is equivalent to .................. Gg/dm3
6.00 x 10^-15
6.00 x 10^-18
6.00 x 10^15
6.00 x 10^18
How many milliliters of 46.0 M Sulfuric acid,H2SO4 should be diluted with water in order to make 1.00 L of 2.00 M solution?
21.73
86.95
43.48
10.5
How many moles of MgO are consumed when 0.998 mol of Mg burns? 2Mg (s) + O2 (g) → 2MgO (s)
0.998
0.499
1.996
0.332
There are ......... Milliseconds in 10000 Seconds
1 x 10^7
1 x 10^-7
1 x 10^4
1 x 10^-4
55.8 grams of O2 (32.0 g/mol) are produced experimentally from the reaction of 45 grams of H2O (18 g/mol) with excess CO2 . What is the % yield in this reaction? 6CO2 + 12H2O ——> C6H24O6 + 9O2
93%
50%
8%
1.5%
Which of the following pairs is isoelectronic ?
K,Cl-
K+,Cl
K+ , Cl-
K , Cl
Give the answer of the following calculation to the correct number of significant figures: (13.1 - 4.13) x ( 5.6 + 1.444) / 4.1
15.3
15.36
15
2
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