Simple distillation - Study guides, Class notes & Summaries

GCSE AQA Chemistry Exam With All Answers what is a compound - ANSWER contains atoms of two or more elements which are chemically combined in fixed proportions how can compounds be separated into their component elements - ANSWER chemical reactions or electrolysis why is the total mass of products equal to the total mass of reactants - ANSWER no atoms are lost or made what is a mixture - ANSWER contains two or more elements or compounds which are not chemically...

1. What is a mixture? - Ans .Two or more elements not chemically bonded 2. What is the difference between a compound and a mixture? - Ans .Compounds have a fixed composition whereas mixtures do not. Mixtures are not chemically bonded but compounds are. 3. Describe the process of filtration - Ans .Pour the mixture onto the filter paper, the liquid simply passes through the filter paper into the flask. The insoluble solid cannot pass through and so it stays on the paper 4. Describe the pr...

TLETA Week 9 Test with correct Answers Alcohol - Answer ️️ -A family of closely related chemicals whose molecules are made up of hydrogen, carbon, and oxygen Three types of alcohol - Answer ️️ -Methyl Alcohol (methanol) Ethyl Alcohol (ethanol) Isopropyl Alcohol (isopropanol) The type of alcohol contained in alcoholic beverages is - Answer ️️ -Ethanol What's the chemical abbreviation for Ethyl Alcohol - Answer ️️ -ETOH What are the two methods of making drinking alcohol -...

CHEM 2100L/2211L Lab Final | with a complete study set Experiment #1 Re-crystallization - What is the specialized melting point technique that is used to determine the identity of an unknown compound? - Comparative Melting Point -- this is when you make a 50:50 mixture of the unknown compound and the substance you think it is based off given melting point values What are the five steps of re-crystallization? - 1. Choose an appropriate solvent 2. Dissolve the impure mixture in the s...

Give an equation for the combustion of heptane (C7H16) in an excess of oxygen - Ans .C7H16 + 11O2 --> 7CO2 + 8H2O Heptane can be obtained from the catalytic cracking of hexadecane (C16H34) at a high temperature. Identify a suitable catalyst for this process.Give one condition other than high temperature.Give an equation for the catalytic cracking of one molecule of hexadecane to produce one molecule of heptane, one molecule of cyclohexane and one other product. - Ans .Zeolite OR alumi...

Unit 28: Industrial Applications of Organic Chemistry Unit code: H/502/5573 QCF Level 3: BTEC National Credit value: 10 Guided learning hours: 60 Aim and purpose The aim of this unit is to familiarise learners with the structure, naming and properties of a range of organic compounds and to investigate the industrial uses of these compounds. Unit introduction The majority of the substances we use every day are, or contain, organic compounds. Pharmaceuticals such as aspirin and parac...

Experiment for Diffusion? - correct answer 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? - correct answer 1) Put a coloured substance in a solvent e.g f...

▪ What are all substances made of - Ans .atoms. ▪ What is an atom? - Ans .Smallest part of an element that can exist. ▪ What is an element? - Ans .A substance that only contains one type of atom. ▪ How many elements are there? - Ans .about 100. ▪ Where are elements displayed? - Ans .In the periodic table. ▪ How are the atoms of each element represented? - Ans .different chemical symbols. ▪ What are most substances? - Ans .Compounds. ▪ What is a compound? - Ans .2 or more e...

m   1. Which of the following is the mRNA start codon in most cases? A. UAA B. AGU C. AUG D. UGA 2. Which of the types of RNA is the smallest? A. mRNA B. tRNA C. rRNA D. 3. Which of the following is not considered a pyrimidine? A. C B. T C. U D. G 4. Which of the following is paired correctly? A. A-G B. C-G C. A-U D. G-T 5. Which of the following characterizes a Western blot? A. Antibody/protein hybridization B. DNA/RNA combination C. RNA ...

M5 FINAL COACHING EXAM - Questions and Answers (Complete Solutions) Identify cosmetics which are regulated as drugs. A. Hair colors, toothpastes B. Skin moisturizers, perfumes, nail polishes C. Shampoos, lipsticks D. Mouthwashes, antiperspirants, diaper ointments, lip balms Identify the use of Potassium Diformate in veterinary medicine. A. Antiparasitic B. Strong antimicrobial C. Anti-acidic agent D. Sedative Which statements BEST describe the local effects of drugs? I. Local effects are felt ...