There are two major branches of chemistry or subdivisions, name them. Classify it as acidic or basic and explain your reasoning. What volume of concentrated H2SO4 would you use in order to make 3.00 L of 4.0 M stock solution? Na + H2O arrow NaOH + H2. Each sample is diluted in Standard Dissociating buffer and heated for 5 mins before placing on ice and loading onto the gel. Approximately how much faster? b) a mixture of carbon and oxygen. PDF IGCSE Complete Chemistry Notes - WELCOME IGCSE IGCSE Complete Chemistry Notes . Exam questions organised by topic, past papers and mark schemes for CIE O Level Chemistry. a. boron b. fluorine c. helium d. nitrogen e. beryllium, Which atom has a mass number of 13 with 6 neutrons? b. For the following reaction, 29.3 grams of hydrochloric acid are allowed to react with 58.8 grams of barium hydroxide. What is the mass of calcium carbonate needed to produce 93.0 L of... What is the pressure in a 29.2-L cylinder filled with 21.6 g of oxygen gas at a temperature of 343 K? The volume of a single chromiumatom is 8.10*10^-24 cm^3. Explain why staggered conformer is more stable than an eclipsed conformer? Visit Save My Exams today! Give the net ionic equation for each test. What negative effects has the growth of the chemical industry had on... A mixture containing 15.0 mol% hexane balance N2 flows through a pipe at 6.53 kmol/h. A. enzyme B. nucleus C. isotope D. compound. How many water molecules can hydrogen bond to methanol? It has a molar mass of 62.07 g/mol. Discuss the atomic structure and chemical bonding. And voila - model answers were born! For the reaction shown, compute the theoretical yield of product (in moles) for each of the following initial amounts of reactants. According to the kinetic theory of gases, particles of a gas are very large particles. Are chemical elements considered chemicals? Predict the hybridization of the central atom in the DMSO molecule. Earn Transferable Credit & Get your Degree. What is the condensed noble gas electron configuration for Nb atom? What is the H3O+(aq) of the 0.83 mol/L CH3COOH(aq)? Give an example of how applied science has impacted your life. Convert the % concentration of acetic acid in a vinegar solution to a g/100 mL concentration given that the concentration in g/100 mL for 100% acetic acid is 4.2 g/100 mL. Use hyperconjugation concept to explain. and peak B has a retention time of rB=5 min., what is the resolution of these two peaks given that both have a peak width of 1.0 min.? What is the molarity of the stock solution of luminol? Name the five major divisions of chemistry. e) the... For the following reaction, 27.6 grams of calcium hydroxide are allowed to react with 32.0 grams of hydrochloric acid. 1.00 g of this compound was dissolved in water to form a 100.0 mL solution. Could we use HCl instead in HNO3 in the Volhard method? B) Identify the oxidizing agent and the reducing agent. A coolant widely used in automotive engines is 38.70% carbon, 9.75% hydrogen, and 51.56% oxygen. a. How many mL of sodium metal, with a density of 0.97 g/mL, would be needed to produce 12.8 grams of hydrogen gas in the unbalanced single replacement reaction below? What is the volume of a chromiumatom in microliters? Medical aspirants usually find NEET Chemistry MCQ Preparation be the most scoring section but if … The molecular shapes of water and methane are based on sp3 hybrid orbitals attached to the central atoms. Why does the atomic radius increase from top to bottom? What mass of CCl4 will be formed if 1.20 moles of methane react with 1.04 moles of chlorine? Which one of the following is the true covalent oxide of iodine? The unbalanced chemical equation for this reaction is given below. When is the absorption spectrum of an electron generated? Select one: A. no such law exists B. law of combining volume... (a) What are the principles of chemistry? How many moles of PbC_2O_4 (s) precipitate from the resulting solution? a) they participate in the same types of reactions. D. How are they transported? The gas volume factor at 4200 psia is 0.003425 f t 3 / S C F and at 750 psia is 0.0185... Did Marie Curie get her PhD in chemotherapy? Its molecular formula is C63H88CoN14O14P. A sample of gas has a mass of 0.545 g. Its volume is 116 mL at a temperature of 84 deg C and a pressure of 737 mmHg. CaO + SO2 + O2 arrow CaSO4. Air in the amount of 1 lbm is contained in a well-insulated, rigid vessel equipped with a stirring paddle wheel. Save My Exams is the home of revision. Dissolving ammonium bromide in what gives an acidic solution. Mention the ten (10) applications of Kohlrausch's law of independent ionic mobility. Hydrochloric acid(aq) + barium hydroxide(aq) barium chloride(aq) + water(l). What happens to the atomic radius as you go down a period�. What law states the total volume of gaseous products from a chemical reaction must equal the sum of the volumes of gaseous reactants? (b) are very far apart. One mole of a gas occupies 22.4 L at (a) 0 C and 0.50 atm. (SH of Fe is 0.450 J/(g C)). Found: 26 Jan 2021 | Rating: 90/100. What element has 16 neutrons and a mass number of 31? c. has the lowest ratio of moles availab... How many grams of calcium nitrate, Ca(NO_3)_2, contains 24 grams of oxygen atoms?