Balanced equation Study guides, Class notes & Summaries

OCR A Level Chemistry Paper 2 (H432/02) Synthesis and analytical techniques Mark Scheme for June 2023. Trend for all 3 hydrocarbons (1 mark): Boiling point increases with less branching OR less methyl/alkyl groups/side chains  Explanation with comparison (3 marks): Branching and surface contact (Less branching gives) more (surface) contact / interaction (between molecules)  Surface contact and London forces (More surface contact) gives more /stronger induced dipole(–dipole) inte...

ABCTE- Basic Chemistry Part 2What is a chemical reaction - correct answer a chemical reaction? Some indications of a chemical reaction include what - correct answer a change in temperature, such as in fire, a color change that indicates the presence of a different substance, and the generation of electrical current by a battery. Chemical reactions are written using what - correct answer shorthand similar to a mathematical equation. reactant A + reactant B product C + product D Unli...

CHEM 161 EXAM 2 Answers actual yield the experimental quantity, in grams, of product obtained in a reaction. Avogadro’s number the number of particles (6.022 x 10^23) of a substance in 1 mol of that substance. By definition, Avogadro’s number is equal to the number of carbon-12 atoms in exactly 12.00 g of carbon-12. balanced appropriate coefficients have been added such that the number of atoms of each element are the same in both reactants and products. chemical equation a prec...

Accounting - correct answer -The process of compiling and analyzing financial records is known as __ Equity - correct answer -Subtract a company's debt from its assets to determine its __ Assests = liabilities - correct answer -An equation that represents a balanced account for a business is __ Plumbers on the team - correct answer -Ensuring that the project is kept on schedule and within budget is a responsibility of the __ Critical path management - correct answer -The abbreviatio...

1. Question: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of 2. Question: What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? 3. Question: What is the molecular mass of Br2? 4. Question: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? 5. Question: How many moles of hydrogen chloride are contained in a 52.6 g sample of this gas? 6. Question: 1.00 mole of O2 contains the same number ...

What single change to the experimental system would reduce the electric field strength necessary to maintain the oil drop in static equilibrium? ANS- Decreasing the mass of the drop -When the oil drop (with charge -q) is in static eqbm, the electric force it feels, qE upward, is balanced by the gravitational force, mg downward. Thus, qE = mg, so E = mg / q. Don't be confused by the electric field strength in a capacitor, E = V / d. Which of the following equations gives the voltage V ...

1. Question: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of 2. Question: What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? 3. Question: What is the molecular mass of Br2? 4. Question: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? 5. Question: How many moles of hydrogen chloride are contained in a 52.6 g sample of this gas? 6. Question: 1.00 mole of O2 contains the same number ...

One type of acid-base buffer is composed of a weak , which will react with any added base, and its conjugate , which will react with any added acid. correct answer: Blank 1: acid Blank 2: base Which of the following combinations could be used in an acid-base buffer system? Select all that apply. correct answer: NH3 /NH4Cl CH3COOH/NaCH3COO HNO2 /KNO2 If NaClO (aq) is added to the reaction shown below, which of the following statements would be true? Select all that apply. HClO (aq) + ...

1. Question: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of 2. Question: What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? 3. Question: What is the molecular mass of Br2? 4. Question: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? 5. Question: How many moles of hydrogen chloride are contained in a 52.6 g sample of this gas? 6. Question: 1.00 mole of O2 contains the same number ...

1. Question: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of 2. Question: What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? 3. Question: What is the molecular mass of Br2? 4. Question: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? 5. Question: How many moles of hydrogen chloride are contained in a 52.6 g sample of this gas? 6. Question: 1.00 mole of O2 contains the same number ...