1. The diameter of a neutral Helium atom is about 1 x 102 pm. Suppose we could line up Helium atoms side by side in contact with one another. Approximately, how many atoms would it take to make the distance from end to end 1 cm? 2. What is the mass number of an iron atom that has 28 neutrons? 3. Determine the number of protons and neutrons in the nucleus of: a) He z=2 A=3 b) He z=2 A=4 c) Mg z= 12 A=24 d) Mg z= 12 A= 25 e) Ti z= 22 A=48 f) Br Z=35 A = 79
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- OWLV2 | Online teaching and X OmySigTau x b Login | bartleby M COMM.1113: FUND OF ORAL X G what food has c - Google Se X + now.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] A certain microwave oven delivers 750 watts (J/s) of power to a coffee cup containing 41.0 g of water at 35.3°C. If the wavelength of microwaves in the oven is 9.75 cm, how long does it take, and how many photons must be absorbed, to make the water boil? The specific heat capacity of water is 4.18 J/°C-g and assume only the water absorbs the energy of the microwaves. photons Submit Answer Try Another Version 3 item attempts remaining Previous Nextb Answered x Co. How to Ca x N NSU Logir x PeriodicTa XM Action Rec X 0 mySigTau X G 4.25 ml to X NBA Final xG scientific c X + w.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] In 1897 the Swedish explorer Andreé tried to reach the North Pole in a balloon. The balloon was filled with hydrogen gas. The hydrogen gas was prepared from iron splints and diluted sulfuric acid. The reaction is Fe(s) +H2SO4 (ag) → FESO4(aq) + H2 (g) The volume of the balloon was 4800 m and the loss of hydrogen gas during filling was estimated at 20.%. What mass of iron splints and 98% (by mass) H2SO4 were needed to ensure the complete filling of the balloon? Assume a temperature of 0°C, a pressure of 1.0 atm during filling, and 100% yield. Mass of Fe = Mass of H2SO4 g Submit Answer Try Another Version 3 item attempts remaining Previous Next Email Instructor Save and Exit Cengage Learning | Cengage Technical Support%ot 令4N ۱۷ من ۲ ۲ YAA @ Asiacel I. A docs.google.com قسم بلا عنوان You are presented with a prescription for Zyloric tablets 100 mg at a dose of 300 mg each day for 7 days, reducing to 200 mg for further 7 days. Then, 100 mg for another 7 A ays. How many packs of 28 tablets should ?you supply Two and a half Three One | Four One and a half The number of days a 150 mL bottle of nitrazepam 2.5 mg/5 mL suspension will last a patient prescribed nitrazepam 5 mg at * .bedtime for insomnia 10 وسن سالم طاهر B2 21:46 äcluI 21.03.11
- k Mh1 = %3DMla pnc.com/women Mail - Whi x O Grades for x Course Ho X G oxide cont X G Exercise 4.x E 4 - Molecu x O Bananas a X 1.84 x 10- x + envellum.ecollege.com/course.html?courseld 16985674&OpenVellumHMAC=a0b841caaee7feddab1623a6c83a92c0#10001 Review | Constants I Periodic Table Percent composition refers to the mass percent of each element in a compound: mass of element Part A mass percent = x 100% mass of compound > For example, the percent composition of water, H2O. is 11.2% hydrogen and 88.8% oxygen. Therefore, a 100-g sample of water contains 11.2 g of hydrogen atoms and 88.8 g of oxygen atoms. A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: CH22 Enter the percentages of carbon and hydrogen numerically to four significant figures, separated by commas. The periodic table will be useful when doing this problem. You can access a periodic table by clicking the "Tools" link in the upper right…CUTE ASS Gwinn X B Homepage-2021S x A Classwork for 2021 x E Danesha Patterson x Commonlit | The S docs.google.com/document/d/1TNETJ72LOKTHX-Ab-VC2FSAnLbFjT2a5pa79lj8 CommonLit | The Scramble for Africa |Free Reading Passages and Literac. izzes - 2021S1 H. commonlit.org anesha Patterson - Copy of Stoichiometry DLD Review 2020 (2).DOCX @ e Edit View Insert Format Tools Add-ons Help Last edit was 2 days ago E A, P Normal text Arlal 100% +BIUA E = E E tE 1E E - E - 4. 11 w .. gi - 2 3. 4 7 **Draw your T-charts on a piece of paper and take a pic to upload*** Use the equation given below for questions 1-3 , - 1co, + 2 H,O How many moles of methane (CH,) are needed to produce 3.7 moles of water (H,O)? 1CH, + 20, 1. 2. How many grams of oxygen (0,) react if the reaction produces 0.9 moles of carbon dioxide (CO,)? How many grams of water (H,O) are produced if 136 grams of methane (CH,) react completely in this reaction? If you start with 136 grams of methane (CH4), what is the theoretical…
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