Chemistry Homework Help: Answers & Questions
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Most students try to avoid chemistry, as they consider it a complex subject, which requires lots of skills, knowledge and attention to details. However, it helps us to solve any problem we may face in every day life and that is what makes chemistry so special and important.During the classes, every student faces various topics, including:
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- - Organic chemistry;
- - Measurement;
- - Nuclear reactions and much more.
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Waiting for answer Is a cubic meter (m3) equal to, different from , larger than ,or smaller than a cubic centimeter (cm3)?$15.00
Waiting for answer 2TiO2 + 4Cl2 + 3C → CO2 + 2CO +2TiCl4 How many moles of chlorine, Cl2, will react with 4.5 moles of carbon,C? A. 3.4 mol B. 6.8 mol C. 6.0 mol D. 0.67 mol$15.00
Waiting for answer Large doses of vitamin C are supposed to cure the common cold. One commercial over-the-counter product consists of 500.0-mg tablets that are 20.0% by weight vitamin C. How many tablets should one take$15.00
Waiting for answer The equation for the formation of water from hydrogen gas and oxygen gas is 2H2 + O2 = 2H2O. How many grams of water can be made from 64g of oxygen gas? a) 405g b) 720g c) 180g d) 72g$15.00
Waiting for answer A sample is prepared by completely dissolving 10.0 grams of NaCl in 1.0 liter of H20. Which classification best describes this sample? a) homogeneous compound b) homogeneous mixture c) heterogeneous c$15.00
Waiting for answer Carbon-14 has a half-life of 5730 years. If the age of an object older than 50,000 years cannot be determined by radiocarbon dating, then A. carbon-14 levels in a sample are undetectable after undete$10.00
Waiting for answer An underground copper pipe is used to transport oil under a factory. It is very important that this pipe does not oxidize, so engineers use impressed current cathodic protection. a. Would zinc be an a$10.00
Waiting for answer How many milliliters of 0.600 m hcl should be added to 3.34 g of na3po4 (163.94 g/mol) to yield a solution that has a ph of 11.80 when diluted to 5.00 x 102 ml. for h3po4 pka1 = 2.148, pka2 = 7.198 an$10.00
Waiting for answer Name two organic compounds that cannot be extracted effectively from an aqueous solution by means of an immiscible organic solvent such as diethyl ether or cyclohexane$20.00
Waiting for answer For the baeyer–villiger oxidation of cyclohexyl methyl ketone, shown below, draw the main organic product.$20.00
Waiting for answer John Quincy has been a citizen of the United States for 8 years he is 27 years old if John decided to run for Congress what are his options$50.00
Waiting for answer Question 2: Redox Reactions a) The environment on Earth is an oxidizing environment. Write 2-3 sentences to describe, using oxidation numbers, how the oxidation number of carbon changes in the convers$20.00
Waiting for answer A substance has the following properties: Heat capacities: 1.34 J/g oC (solid) 3.02 J/g oC (liquid) 2.55 J/g oC (gas) Heat of Fusion = 4.23 kJ/mole Heat of Vaporization = 23.5 kJ/mole Melting Point =$12.00
Waiting for answer What is the oxidation number of each phosphorus atom (P) in the compound calcium phosphite, Ca3(PO3)2? -2 -3 +3 +6$50.00
Waiting for answer If 0.6 moles of an ideal gas occupies a volume of 2.735 L and has a pressure of 5.4 atm, what is the temperature of the gas?$50.00
Waiting for answer A liquid that occupies a volume of 8.2 liters has a mass of 5.6 kilograms what is the density of the liquid in kg/L$20.00
Waiting for answer Atoms of two adjacent elements in the third period are in the ground state. An atom of element A has only s electrons in its valence shell. An atom of element B has at least one p electron in its vale$10.00
Waiting for answer One amu is equal to the mass of an electron the mass of one proton or one electron the mass of one neutron or one electron the mass of one neutron or one proton$35.00
Waiting for answer Please help me in numbers 3 and 4$10.00
Waiting for answer Hown below are the titration curves of two amino acids. select the pka values of each functional group observed on the titration curve and identify which amino acid is being titrated?$35.00