Stoichiometry • Calculations involving quantities of consumed reactants and formed products based on a BALANCED chemical equation. Mass Molar Mass Mole Coeff Bal Eqn Mole Molar Mass Mass Example 2 • The Haber Process involves reacting gaseous nitrogen and gaseous hydrogen to form ammonia. Determine the mass in grams of hydrogen gas required to form 1.00 x 103 g ammonia. Your Turn 2 • If you react 52.9 g of potassium chlorate (KClO3) with excess phosphorus
Premium Chemical reaction Stoichiometry Hydrogen
Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
Premium Electrochemistry Electrolyte Electrolysis
Isotopes and average atomic mass Isotope: element variations with different atomic mass but same atomic number Isotopic Abundance: the relative amount in which each isotope of an element Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u] 1) Given average atomic mass: 10.81u If given percentages‚ you can find average atomic mass by adding each portion 2) Set variables for unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate:
Premium Chemical element Neutron Atomic number
1. (a) The diagram below represents the industrial fractional distillation of crude oil. (i) Identify fraction A. (ii) What property of the fractions allows them to be separated in the column? (2) (b) A gas oil fraction from the distillation of crude oil contains hydrocarbons in the C15 to C19 range. These hydrocarbons can be cracked by strong heating. (i) Write the molecular formula for the alkane with 19 carbon atoms. (ii) Name the type of reaction involved in cracking. (iii) Write
Premium Petroleum Gasoline Internal combustion engine
Scuba diving is a form of underwater diving in which a diver uses a scuba set to breathe underwater. According to the Professional Association of Diving Instructor (PADI)‚ a “DEEP DIVE” is considered to be anything from 18 meters (60 ft) to 30 meters (100 ft). A scuba diver moves around underwater by using swim-fins attached to the feet‚ however external propulsion can be provided by a diver propulsion vehicle. Scuba diving may be performed for a number of reasons; either for recreational purposes
Premium Scuba diving Underwater diving
Keghan Chapter 8 MULTIPLE CHOICE QUESTIONS Topic: Structure Elucidation 1. An alkene adds hydrogen in the presence of a catalyst to give 3‚4-dimethylhexane. Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product. The structure of the alkene is: CH3 A) CH3CH=C-CHCH2CH3 (cis or trans) CH3 CH3 B) CH3CH2C=CCH3 (cis or trans) CH2CH3 C) CH3 CH2=CCH2CHCH2CH3 CH3 CH2 D) CH3CH2CCHCH2CH3 CH3 CH3 E) CH3CH2CHCHCH=CH2
Premium Chlorine Hydrogen Hydrochloric acid
IMPORTANCE OF SOCIAL MEDIA IN OUR LIFE “Paper is no longer a big part of my day. I get 90% of my news online‚ and when I go to a meeting and want to jot things down‚ I bring my Tablet PC. It’s fully synchronized with my office machine‚ so I have all the files I need. It also has a note-taking piece of software called OneNote‚ so all my notes are in digital form” are the words of Bill Gates Social media plays an important role in today’s world. It is impossible to imagine a day without internet
Premium World Wide Web Internet
Learning english is important for our daily life.. As we all know‚ English is the one of important language in this world. If we cannot speak English even a little bit‚ we are called as a very poor in this community. We also cannot improve our life if we worst in English. We will feel loser if we in the group that use English as a medium to speak. According to the research that have been made by the group of University Malay‚ 70% of undergraduate student especially Malay student are not use
Premium Malaysia Lingua franca University
If you hear the word monster today a lot of different creatures and story’s come to your mind. But did you ever think about how monsters are created? Timothy K. Beal’s “Our Monsters‚ Ourselves” is arguing the idea of that we are creating the monsters in our life ourselves. He is using many rhetorical techniques to get the readers to not only agree‚ but also relate to what he is writing. Beal’s arguments are well organized and persuasive. The rhetorical techniques ethos‚ logos and pathos strongly
Premium Rhetoric Ethos Argument
Technology is an improved route to an unimproved target. Technology is associated with innovation. It has definitely changed our lives for the better. Looking back in time‚ we realize that how much our lives have changed due to the fruits of technology.It has provided us with freedom and less consumption of time and resources. One the most effective pieces of technology is the mobile phone‚and nowadays being equivalent to a civilization. Due to technology changes‚ the dependency upon technology has
Premium Technology Change Innovation