Water properties Study guides, Class notes & Summaries

Phosphorus has an atomic number of 15. This tells us that... - Answer-there must be 15 protons True or False: covalent bonds are stronger than ionic and hydrogen bonds because atoms that are joined with covalent bonds share electrons - Answer-True An e- in a hydrogen atom exists in the first valence shell. The valence e- of Aluminum exist in the 3rd shell. Which valence shell e- have higher potential energy and why? - Answer-the valence e- of aluminum, bc higher e- shells have higher energy...

Board of Cosmetology (PSI) Written Exam Prep| Q-Bank| Questions With Verified Answers ( Pass 2024| Graded A Store disinfected implements in? (Ans: - Clean, dry & cover containers The chemical process whereby cells are nourished & carry out their activities is? (Ans: - Metabolism Study of the structure, function, & diseases of the muscles? (Ans: - Myology Muscles that control movement of fingers & hand? (Ans: - Muscles of the forearm The federal agency that regulates & enforces...

BCH4024 Exam 1 Purich Questions & Answers 2023/2024 Basic Structure of water - ANSWER--large dipole moment -very polar that interactions between H2O molecules are strong--high heat capacity -liquid water=H-bonds are relentlessly made and broken; thus a flickering collection of W5 structures, with extremely little W1 -each water molecule can form up to 4 H-bonds -liquid water has 3.4 H-bonds on average -ice has 4 H-bonds H-bond - ANSWER-stable interaction occurring when 2 EN atoms shar...

BIOL 1P91 Final Exam Questions And Verified Solutions What are the 3 general components that make up an atom? - ANS Protons Neutrons Electrons The sum of the atomic number and the number of neutrons is: - ANS A (the atomic number) Mass Number Which of the following is/ are a polar bond? A) O-H bond in water * B) C-O in CO2 C) N-N in N2 D) all of the above E) two of the above - ANS A) O-H bond in water A substance dissolvable in oil is said to be: - ANS Hydrophobic...

Virulence: mycolic acid in cell wall causes slow growth, protection from lysis once bacteria are phagocytized, capacity for intracellular growth, resistance to Gram-staining, detergents, many antimicrobial drugs, and dessication - Answer-Mycobacterium Tuberculosis Unique properties: grows very slowly, can live within macrophages, tuberculin skin test--positive when red swelling appears, BCG vaccine is used in countries w/ lots of TB cases, effective on 80% of children and 20-50% of adults, ...

Define IPM - ANSWER-1. a pest population management system that anticipates and prevents pests from causing damage. 2. an ecological approach to pest control. Components of IPM - ANSWER-1. Pest identification 2. Monitoring 3. Use of natural enemies (biological control) 4. Pest-resistant plants 5. Cultural and structural changes 6. Judicious use of least toxic pesticides Intent of IPM - ANSWER-To use tactics that include pesticide alternatives that reduce the total amount of pestici...

Chemistry Review-Water properties of water Questions and Answers Graded A+ Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? Polar groups attract one another. Dissolving is best described as mingling of molecules and/or ions. Water is a source of ______________ for chemical reactions in cells. Oxygen and Hydrogen. Which statement is true of water's tensile strength? (a) It results from hydrogen bonding. (b) It helps to pull water through p...

LEG2601 Assignment 2 (ANSWERS) Semester 1 2024 - DISTINCTION GUARANTEED. Answers, guidelines, workings and references..... .... Question 1 Complete Marked out of 1.00 Question 2 Complete Marked out of 1.00 QUIZ … is an example of a heritage resource protected under the National Heritage Resources Act 25 of 1999. a. Great-grandmother’s vase. b. A collection of South African 1 cent coins (no longer in circulation). c. Any gravesite. d. A building older than 60 years. A number...

Introduction to Chemistry 5th Edition by Rich Bauer – Test Bank Description Introduction to Chemistry 5th Edition by Rich Bauer – Test Bank Sample Questions Instant Download With Answer s Introduction to Chemistry, 5e (Bauer) Chapter 3 Chemical Compounds 1) The figure shows all but which of the following? 1. A) two elements and a compound 2. B) a chemical reaction 3. C) one mixture and one pure substance 4. D) three compounds Answer: D Difficulty: 1 Easy Topic: Study of Chemistry Bloom’s: ...

GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H Version: 1.0 Final *JUN238464C2H01* IB/M/Jun23/E7 8464/C/2H For Examiner’s Use Question Mark 1 2 3 4 5 6 TOTAL Tuesday 13 June 2023 Morning Time allowed: 1 hour 15 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at t...