Endothermic answer h - Study guides, Class notes & Summaries

Semmelweis Entrance Exam Chemistry| Questions With Verified Answers What are the 4 main elements of living organisms? Correct Answer: carbon, nitrogen, oxygen, hydrogen What are atomic orbitals? Correct Answer: regions where there is a high probability of finding an electron What are the first few electron configurations? Correct Answer: 1s 2s, 2p 3s, 3p, 3d 4s, 4p, 4d, 4f What are primary chemical bonds? Correct Answer: ionic, covalent, metallic What are secondary chemical bo...

A red-hot iron nail is immersed in a large bucket of water. Although the nail cools down sufficiently to be held bare-handed, the temperature of the water barely increases. Which properties keep the water temperature from changing much? water's high specific heat capacity the large mass of water Which phrase best describes heat? the energy transferred between objects at different temperatures In an isolated system, two copper bars at different temperatures transfer energy until...

AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Version: 1.0 Final *JUN2384621H01* IB/M/Jun23/E15 8462/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Monday 22 May 2023 Morning Time allowed: 1 hour 45 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...

Cosmetology practical Exam 311 Questions with Verified Answers Stylist should recommend hair or scalp treatment only - CORRECT ANSWER after hair and scalp analyst Finger waving - CORRECT ANSWER shaping the hair into an S formation using comb lotion and fingers for roller set height and volume is required - CORRECT ANSWER how it sits o its base will determine the volume achieved on base volume half base medium off base for lead volume 45 degrees down the base Back combing or brush bac...

AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Version: 1.0 Final *JUN2384621H01* IB/M/Jun23/E15 8462/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Monday 22 May 2023 Morning Time allowed: 1 hour 45 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...

1 FINAL EXAM CHEM 219 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ). Correct Answer: E = hv = h x c / λ nm to m or m to nm Correct Answer: 1 m / 10^9 nm or 10^9 nm / 1 m What is the maximum number of electrons that can have the quantum numbers n = 3, ℓ = 2, mℓ = -2? Correct Answer: The Pauli exclusion principle states that no two electrons in a given atom can share the sa...

Bronsted-Lowry acid - ANSWER a proton donor. Bronsted-Lowry base - ANSWER proton acceptor What is H3O+? - ANSWER hydronium ion definition of pH - ANSWER -log10[H+] How do you get [H+] from ph? - ANSWER 10^(-pH) the ionic product of water - ANSWER [OH-][H+] Is dissociation an endo or exothermic reaction? - ANSWER endothermic Why is the concentration of water not included in Kw? - ANSWER The concentration of water is so large and constant the equilibrium equation can be simplified How do...

Chemistry Final ACS Exam 75 Questions with Verified Answers Accuracy? - CORRECT ANSWER Closeness of measurements to the TRUE VALUE of what is being measured Precision? - CORRECT ANSWER Closeness of a SET of measurements How do you calculate Percent Error? - CORRECT ANSWER I experimental-accepted I ____________________ x 100 accepted value Are zeros infront of non-zero digis significant? - CORRECT ANSWER Nope! ex: 0.0071 is only 2 sig figs Are zeros at the end of a number and...

Chem 101 Final Exam Questions And Answers Latest Top Score. Ionic Compound - correct answer. a compound composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal Covalent Compound - correct answer. a chemical compound formed by the sharing of electrons The Ideal Gas Law - correct answer. PV = nRT. Tells you how a gas responds to a change in its physical conditions. change P, V or T, and the others adjust ...

Topic 5 IB Chem SL Questions with complete solution 2023/2024Open system - correct answer Most chemical reactions take place in an _____ _____ which can exchange energy and matter with the surroundings. Closed system - correct answer This can exchange energy but not matter with the surroundings. Enthalpy (H) - correct answer The heat content of a system is called its _____, a name which comes from the greek word 'heat inside'. When heat is added to a system from the surroundings this inc...