Subliming - Study guides, Revision notes & Summaries

exothermic reaction : a chemical reaction that releases energy to its surroundings "Heat" is best described as : the energy transferred as a result of a temperature difference endothermic reaction : A reaction that ABSORBS energy in the form of heat Iodine Vapor depositing on a cool surface : exothermic water condensing on a cold glass : exothermic propane burning : exothermic dry ice subliming 2 | P a g e : physical, endothermic reaction water freezing : exothermic reaction W...

Chem 120 final exam 4 GRADED A+ (ACTUAL EXAM ) Questions and Answers (Solved) 1. Exam 1- Which of the following correctly describes a physical change? Burning a candle, Rusting of iron, Photosynthesis of glucose, Subliming ofdry ice. Answer: Subliming of dry ice 2. If someone is conducting a study on trees, the statement "leaves turn colorin the fall b/c the amount of sunlight they receive is reduced is a: Answer: Hypothesis 3. The number of significant figures in the measurement of 45...

exothermic reaction correct answers a chemical reaction that releases energy to its surroundings "Heat" is best described as correct answers the energy transferred as a result of a temperature difference endothermic reaction correct answers A reaction that ABSORBS energy in the form of heat Iodine Vapor depositing on a cool surface correct answers exothermic water condensing on a cold glass correct answers exothermic propane burning correct answers exothermic dry ice sublimin...

LATEST 2023_2024 CHEMISTRY SUMMARY QUESTIONS WITH ANSWERS ALL IN ONE Example 7.1 Evidence of a Chemical Reaction Which changes involve a chemical reaction? Explain your answers. a. ice melting upon warming b. an electric current passing through water, resulting in the formation of hydrogen and oxygen gas that appears as bubbles rising in the water c. iron rusting d. bubbles forming when a soda can is opened Solution a. not a chemical reaction; melting ice forms water, but both the ic...

Question number Answer Notes Marks 1 (a) nucleus ACCEPT nuclei 1 (b) 11 / eleven 1 (c) 1 / one / group 1 1 (d) 3 / three / period 3 1 (e) +1 / 1+ ACCEPT + / Na+ / positive 1 1 IGNORE positive alone Total 5Question number Answer Notes Marks 2 (a) Change Change of state water to ice freezing steam to water condensation solid wax to liquid wax melting iodine crystals to iodine vapour sublimation ALLOW condensing ALLOW subliming 4 (b) (i) (ii) M1 heat M2 stir / mix filter...

exothermic reaction correct answers a chemical reaction that releases energy to its surroundings "Heat" is best described as correct answers the energy transferred as a result of a temperature difference endothermic reaction correct answers A reaction that ABSORBS energy in the form of heat Iodine Vapor depositing on a cool surface correct answers exothermic water condensing on a cold glass correct answers exothermic propane burning correct answers exothermic dry ice sublimin...

UCF-CHM2045C % comp - Answer- = (looking for)/ compound Percent Abundance - Answer- set to x and 1-x Molecular formula from empirical - Answer- Mass of molecular/ mass of empirical convert three elements - Answer- find the molar mass and divide by lowest mol Formula for conversions - Answer- Mass=(1/amu)=Mole=(Avo #/Mole)=Atom (2(compound)/Compound)=Atoms Atomic Number - Answer- Protons Mass # - Answer- Protons and neutrons Isotopes are what? - Answer- different neutrons...

LATEST 2023_2024 CHEMISTRY SUMMARY QUESTIONS WITH ANSWERS ALL IN ONE Example 7.1 Evidence of a Chemical Reaction Which changes involve a chemical reaction? Explain your answers. a. ice melting upon warming b. an electric current passing through water, resulting in the formation of hydrogen and oxygen gas that appears as bubbles rising in the water c. iron rusting d. bubbles forming when a soda can is opened Solution a. not a chemical reaction; melting ice forms water, but both the ic...

EOSC 114 - Fragile Systems Exam Questions and Answers Latest Update Graded A+ the distance 35,000m is equal to - Answers 3.5 x 10^7 m the speed at which wave energy propagates is called the ____ speed - Answers group consider object A with a mass of 10kg and object B with a mass of 20 kg, both moving at a speed of 1m/sec. Which of the following statements of TRUE? - Answers the kinetic energy of Object B is 2X the kinetic energy of object A most disaster scales are - Answers logarithmic the...

Example 7.1 Evidence of a Chemical Reaction Which changes involve a chemical reaction? Explain your answers. a. ice melting upon warming b. an electric current passing through water, resulting in the formation of hydrogen and oxygen gas that appears as bubbles rising in the water c. iron rusting d. bubbles forming when a soda can is opened Solution a. not a chemical reaction; melting ice forms water, but both the ice and water are composed of water molecules. b. chemical reaction; wat...