Molar mass Study guides, Class notes & Summaries
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Mole and Molar Mass exam with 100% Correct answers already graded A+
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Mole and Molar Mass exam with 100% Correct answers already graded A+
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LMR Molar Mass Review B 2022
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LMR Molar Mass Review B 2022 
 (show all work) 
 
 
 
 
1.FIND THE MOLAR MASS OF 
a)	Na2S 
 
 
 
Na	23.0	46.0 
S	32.1	32.1 
= 78.1 or 78 g 
b)	Li2SO4 
 
 
 
Li	6.94	13.88 
S	32.1	32.1 
O	16.0	64.0 
= 109.98 or 110.0 g 2.CALCULATE THE MOLAR MASS OF 
a)	ALUMINUM CHLORIDE Al3+ + Cl-1 = AlCl3 
 
Al	27.0	27.0 
Cl	35.5	106.5 
= 133.5 or 134 g
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RNAS C Practice Test Review 437 Questions with Verified Answers,100% CORRECT
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RNAS C Practice Test Review 437 Questions with Verified Answers 
 
A capacitor and resisitor in parallel - CORRECT ANSWER will have same voltage across since in parallel. 
if in series, voltage drops would occur 
 
they can be treated together 
 
If the absolute pressure of a gas is increased from 3 atm to 4 atm at constant volume, then the absolute temperature of the gas will increase by: 
A. 25%. 
B. 33%. 
C. 67%. 
D. 75% - CORRECT ANSWER B. Assuming the validity of the Ideal-Gas law, PV = n...
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MOLAR MASS CK12 exam with 100% Correct answers already graded A+
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MOLAR MASS CK12 exam with 100% Correct answers already graded A+
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AP Chemistry Exam Review
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atomic number CORRECT ANSWER The same as the number of protons in the nucleus of an element; it is also the same as the number of electrons surrounding the nucleus of an element when it is neutrally charged. 
 
mass number CORRECT ANSWER The sum of an atom's neutrons and protons 
 
isotopes CORRECT ANSWER Atoms of an element with different numbers of neutrons 
 
Avogadro's number CORRECT ANSWER 6.022×10²³ particles per one mole 
 
Moles CORRECT ANSWER grams/molar mass 
 
Standard Temperatur...
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Edexcel iGCSE Chemistry, question and answer with rated solution
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Edexcel iGCSE Chemistry, question and answer with rated solution 
Experiment for Diffusion? 
1) HCl placed at one end of the test tube, ammonia solution at the other. 
2) Where they meet, a ring of Ammonium Chloride appears. 
3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. 
 
 
 
Experiment for Dilution? 
1) Put a coloured substance in a solvent e.g food colouring in water. 
2) Over the time, the colour le...
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ACS Gen Chem 2 Final Exam Study Guide questions with correct answers
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C CORRECT ANSWER Where is the hydrophilic (attracted to water) region of the molecule? 
(A) Region 1 
(B) Region 2 
(C) Region 3 
(D) The three regions are equally hydrophilic 
 
C CORRECT ANSWER Which molecule is most soluble in water? 
 
D CORRECT ANSWER A solution of NaCl in water has a concentration of 20.5% by mass. What is the molal concentration of the solution? 
 
Molar Mass NaCl = 58.44 g/mol 
 
(A) 0.205 m 
(B) 0.258 m 
(C) 3.51 m 
(D) 4.41 m 
 
B CORRECT ANSWER What is the mole fracti...
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HESI A2 CHEMISTRY-CHRISJAY FILES (1) (1)
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HESI A2 ENTRANCEEXAM 
FOR 
CHAMBERLAINCOLLGE 
OF NURSING 
2023 QUESTIONS WITH 
ANSWERS 
CHEMISTRY 
HESI A2 CHEMISTRY V1/V2 FILE 
1. If a Hydrogen isin a compound, what would its oxidation number be? 
+1 
2. What isthe oxidation number of any simple ion? 
+1 or -1 depending on the charge of the ion 
3. How many kilograms are in a pound? 
0. kg 
4. What is the temperature for freezing point of water in Celsius? 
0 degrees Celsius (32°F for Fahrenheit) 
5. What is the conversion of Celsius to Fah...
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ACS Gen Chem 2 Final Exam 2023 with 100% correct answers
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C - correct answer Where is the hydrophilic (attracted to water) region of the molecule? 
(A) Region 1 
(B) Region 2 
(C) Region 3 
(D) The three regions are equally hydrophilic 
 
C - correct answer Which molecule is most soluble in water? 
 
D - correct answer A solution of NaCl in water has a concentration of 20.5% by mass. What is the molal concentration of the solution? 
 
Molar Mass NaCl = 58.44 g/mol 
 
(A) 0.205 m 
(B) 0.258 m 
(C) 3.51 m 
(D) 4.41 m 
 
B - correct answer What is...
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CHEM 101L LAB 4 MOLAR MASS Straighterline 2023
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CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLAR MASS Straighterline 2023..CHEM 101L LAB 4 MOLA...
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