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- Question
What is the gram formula mass of K2CO3 ?
Options- A. 147
- B. 138
- C. 129
- D. 116
- Correct Answer
- 138
ExplanationThe gram formula mass of a compound is nothing but the molar mass.
The molar mass of K2CO3 (Potassium Carbonate) is given by
Atomic weights of individual elements are
K (Potassium) = 39 g
C (Carbon) = 12 g
O (Oxygen) = 16 g
Hence, that of K2CO3 = 39(2) + 12 + 16(3)
= 78 + 12 + 48
= 138.
- 1. IUPAC full form
Options- A. Indian Union of Pure and Applied Chemistry
- B. International Union of Postal and Application Corporation
- C. International Union of Pure and Applied Chemistry
- D. International University of Poland And Combodia Discuss
- 2. Which of the following statements about monosaccharide structure is true?
Options- A. Aldoses and ketoses differ in the position of their hydroxyl groups.
- B. Monosaccharides can be classified according to the spatial arrangement of their atoms.
- C. All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms.
- D. A six-carbon sugar is called a pentose. Discuss
- 3. What is the IUPAC name of [Co(NH3)4Cl2]?
Options- A. Tetra-ammine dichloro cobalt (III) chloride
- B. Tetra-ammine trichloro cobalt (III)
- C. Tri-ammine dichloro cobalt (III) chloride
- D. Tetra-ammine dichloro cobalt Discuss
- 4. Rank these compounds by boiling point- Pentane, Propane and Hexane.
Options- A. Pentane > Propane > Hexane
- B. Propane > Pentane > Hexane
- C. Hexane > Pentane > Propane
- D. Propane > Hexane > Pentane Discuss
- 5. What is the gram formula mass of Li2SO4 ?
Options- A. 101.2487
- B. 109.9446
- C. 111.2687
- D. 106.5871 Discuss
- 6. What are the end products of cellular respiration?
Options- A. ATP, Glucose
- B. Glucose, Oxygen
- C. Oxygen, Water
- D. ATP, Water Discuss
- 7. Which of the following elements has the highest electronegativity?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Helium Discuss
- 8. Which choice best describes the polarity of BrF5?
Options- A. nonpolar bonds / nonpolar molecule
- B. nonpolar bonds / polar molecule
- C. polar bonds / polar molecule
- D. polar bonds / nonpolar molecule Discuss
- 9. Is steel a compound?
Options- A. TRUE
- B. FALSE Discuss
- 10. Which compound forms a colored aqueous solution?
Options- A. CrCl3
- B. KBr
- C. CaCl2
- D. NaOH Discuss
Chemistry problems
Search Results
Correct Answer: International Union of Pure and Applied Chemistry
Explanation:
IUPAC stands for International Union of Pure and Applied Chemistry.
A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. The nomenclature used most frequently worldwide is the one created and developed by the International Union of Pure and Applied Chemistry (IUPAC).
Correct Answer: Monosaccharides can be classified according to the spatial arrangement of their atoms.
Explanation:
Monosaccharides, also called simple sugars, are the most basic units of carbohydrates. They are fundamental units of carbohydrates and cannot be further hydrolyzed to simpler compounds.
Hence, Monosaccharides can be classified according to the spatial arrangement of their atoms is true about Monosaccharides.
Correct Answer: Tetra-ammine dichloro cobalt (III) chloride
Explanation:
The IUPAC nomenclature in organic chemistry is a systematic method that is used to name organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).
The IUPAC name of the given complex [Co (NH?)?Cl? ]Cl is - Tetra-ammine dichloro cobalt (III) chloride.
The complex [Co (NH?)? Cl? ] Cl ionizes an aqueous solution to furnish the chloride ion Cl? and [Co (NH?)? Cl? ] ?.
Correct Answer: Hexane > Pentane > Propane
Explanation:
The boiling point of the compounds depend on the number of carbons in them. Hexane has 6, Pentane has 5 and Propane has 3 carbons. As Hexane is with 6 carbons it has highest boiling point and next Pentane with 5 and lowest Propane with 3.
Correct Answer: 109.9446
Explanation:
The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound.
Given compound is Lithium Sulphate -
Elemental calculation ::
Li - Lithium - 6.941 - 2 - 13.88200 %
S - Sulfur - 32.065 - 1 - 32.065 %
O - Oxygen - 15.9994 - 4 - 63.9976 %
Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446
Hence, the gram formula mass of Li2SO4 = 109.9446.
Correct Answer: ATP, Water
Explanation:
Cellular respiration is the three-step process by which cells make ATP using glucose and oxygen.
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP, waste products include carbon dioxide and water.
Correct Answer: Fluorine
Explanation:
Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.
Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element and lithium is the least.
Correct Answer: polar bonds / polar molecule
Correct Answer: FALSE
Explanation:
Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
Correct Answer: CrCl3
Explanation:
Colored aqueous solutions are a characteristic of transition compounds.
The only transition compound in the above choices is CrCl3.
Cr is a transition element.
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