Calculate the number of moles in 4.80 g of each of the following: a) CS2 b) Ca3N2 c) C6H8O6 (vitamin C). Suppose 26 g of calcium chloride CaCl2 (110.98 g / mol) are dissolved in water to make 200 mL of solution. Para balancear una ecuación química, ingresa la ecuación de una reacción química y pulsa el botón de Balancear. a) 96.0 g/mol b) 92.0 g/mol c) 82.0 g/mol d) 78.0 g/mol. If the infant dose is 1.25 mL, how many milligrams of acetaminophen is administered to an infant? How much solid ammonium sulfate should you add? What is the molar mass of Ca(NO_3)_2? \\ A. a) Determine the number of grams in 0.750 moles of the compound Iron (II) phosphate, Fe3(PO4)2? How many moles are in 5.0 mg of americium? How many moles of N are in 0.235 g of N 2 O ? He finds that 8.5 g of fluorine gas is produced. Calculate the number of mol corresponding to 29.0 g NO_2. |, History of the Periodic table of elements, Electronic configurations of the elements, Naming of elements of atomic numbers greater than 100. Lactic acid, HC3H5O3, is the acid, which forms when milk sours. 0.0625 mol c. 0.0786 mol d. 194.7 mol e. 0.169 mol, Calculate the number of moles in 3.05 g of each of the following: \\ 1.\ SnO_2\\ 2.\ Cr(OH)_3\\ 3.\ Ca_3N_2. What is the molar mass of this compound? a) What is the maximum amount in moles of P2O5 that can theoretically be made from 112 g of P4 and excess oxygen? Calculate the number of moles in 47.51 grams of Al2O3. a) What is the percentage of Cl in the unknown sample? A 2.000 g sample of a zinc and oxygen compound contains 1.6068 g of zinc. How many grams are 4.75 moles of magnesium phosphate? How many moles of M g S i O 3 are in 177 g of the compound? An unknown compound with a molar mass of 223.94 g/mol consists of 32.18% C, 4.50% H, and 63.32% Cl. How many grams of CaCl_2 \cdot 2H_2O would you use to prepare 500 mL of a 20.9 mM solution? A 18.2-g sample of SO_2 contains how many moles of SO_2? ... We can't weigh moles on our scales, so we must convert moles to grams. 55.5 g b. An unknown sample weighs 2.1 g and contains 0.035 moles of molecules. The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS_2). 25.0 g NaOH B.) (a) What is its empirical formula? A)48 B)112.41 C)40.08 D)20, The molar mass of borax, Na_2B_4O_7 cdot 10 H_2 O is: (a) 221.4 (b) 381.4 (c) 180.2 (d) 219.2 (e) 201.2. Find the molar weight of iron (II) ammonium sulfate hexahydrate, F e ( N H 4 ) 2 ( S O 4 ) 2 6 H 2 O . Convert 139.1 grams of magnesium phosphate to moles. If I used 0.355g of methyl-4-formyl benzoate, and the molar mass of said compound is 164.158 g/mol, then how many moles did I use? A 30.6 mg sample of the compound X2O3 contains 14.4 mg of oxygen atoms. A) 65.2 g/mol B) 58.9 g/mol C) 11.4 g/mol D) 22.4 g/mol E) 43.9 g/mol. It is not element, it is a compound which is formed from hydrogen(H2) and oxygen(O2). What is the mass of 9.4 times 10^(25) formula units of Cobalt (III) Dichromate? You are given a 0.6240 g sample of a substance with the generic formula M Cl_2 (H_2 O)_2. If 52.4 mL of NaOH(aq) is required to titrate 0.643 g KHP to the equivalence point, what is the concentration of the NaOH... A) Allison R. Lang determines the mass of an unknown gas to be 10.21 g at 36 degrees Celsius and 780 mmHg in a 3.5 L container. Calculate the number of moles in a 250 g sample of C a 3 ( P O 4 ) 2 . Fe4[Fe(CN)6]3, NaHCO3, ch3coonh4, h2so4, pb(c2h3o2)2*3h2o, caso4*1/2h2o) and press Enter or click Calculate button. b) Using the periodic table of elements, determine the molar mass for this molecule. For this conversion, we use each element's molar mass, found on the periodic table. 82.91 g/mol \\4. The number of moles of an element or compound can be calculated by: A. molar mass divided by volume B. molar mass divided by mass of sample C. mass of sample divided by molar mass D. mass of sample... What is the molar mass of water, H 2 O ? What is the chemical formula for the follo... How many grams of propane (C3H8) are in 1.40 moles of propane? B) How many grams in 2.50 moles of Copper (II) Chloride? What is the molar mass (to the nearest tenth of a gram/mole) of each of the following KCl? What mass of potassium chloride would you need to have the same number of molecules in each sample? a. H2O b. NaF c. Na3PO4 d. K2Cr2O7 e. C6H12O6, Give the molar mass for the compound. How many atoms are there in 5.10 g of phosphorus? What mass of oxygen is present in 10.0 grams of potassium nitrate ( K N O 3 )? Show the calculations required. If 78.4 grams of aluminum metal react with excess hydrochloric acid, how many grams of hydrogen gas can be produced? Answer to the nearest tenth 2. In a reaction to synthesize nitrogen triiodide, 0.023 moles of I2 are needed. 4.88 \times 10^{25} mol \\5. Calculate the number of moles of CO in 1.28 g of CO. (a) 35.45 g/mol (b) 110.98 g/mol (c) 40.08 g/mol (d) 75.53 g/mol, Molar mass, sometimes referred to as molecular weight, is the mass of one mole of a substance, and is usually expressed in: (a) Liters (b) Grams (c) Density (d) Moles, Which of the following is the correct molar mass of glucose (C6H12O6)? Note: Molar mass of silver is 107.87 g/mol. a. Explain how you calculated this value. By mass, nicotine is 74.0% carbon, 8.7% hydrogen, and 17.3% nitrogen. 0.792 grams of H3PO4 c. 5.852 grams of sulfuric acid. NaOH(aq) + HCl(aq) arrow NaCl(aq) + H2O(l), With 1.010 grams of Na2O and excess HCl react, what mass of NaCl could be formed? Nicotine (C10H14N2), a member of the nightshade family of plants, is an oily liquid that makes up between 0.6 to 3% of a cigarette's mass. When used as a food additive, it has … C) 8 kg. What is the mass of 9.10 moles of magnesium chloride, MgCl_2? Determine the molar mass of and then the number of moles in 2.431 g of Na3PO4. How many kilograms of CO_2 would be produced through combustion of a gallon (2.6 kg) of octane (C_8H_{18})? That number is about 6.022*1023 atoms in one mole. Butane has a molecular weight of 58.1 grams in one mole. Calculate the number of moles of chloroform (CHCl3) in 175 grams of chloroform. H is an element with an atomic What is the formula mass of compound H_2X_3? How many moles of Kr are contained in 398 mg of Kr? Calculate the mass of fluorine gas that participates. How many moles of ethanol (CH3CH2OH) are in 141 mg? 2 C_8H_{18} (g) + 25 O_2 (g) to 16 CO_2 (g) + 18 H_2O (g) A) 2.6 kg. Given that 0.832 g of oxygen combined with 0.104 g of hydrogen H is assigned an atomic mass of 1.00 amu. How many moles of solute have you used? How many mol of the phosphate ion (PO4^{3-}) are contained in 750.0 g Ca3(PO4)2? Show all work. How many grams is one mole of carbon dioxide? Determine the number of grams in each of the following: 1) 2.09 E 17 atoms of PCl_5 2) 3.90 moles of NaHCO_3 3) 1.59 moles of CuSO_4. A copper atom has a mass of 1.06 times 10^{-22} g and a penny has a mass of 2.5 g. Use this information to answer the questions below. (Use 1 kg = 2.20 lbs and 58.5 grams of NaCl = 1 mole of NaCl), Calculate the molecular mass of calcium chloride (CaCl2). 81.2 g of Ag b. The total pressure of argon is 231 mmHg. Chloroform, CHCl3 , was formerly used as an anesthetic but its use was discontinued due to respiratory and cardiac failure. Calculate the number of moles of fluorine gas produced. How many moles are in 19.0 grams of oxalic acid, H2C2O4? It requires 22.4 mL of NaOH at 0.156 M to neutralize the acid in a samp... What is the total number of atoms in a 30.0 gram sample of neon? After completely drying the sample (which means removing the 2 moles of H_2 O per mole of M Cl_2), the samp... For the reaction Zn + Cu SO_4 gives Zn SO_4 + Cu (unbalanced) .Calculate the mass of Zn SO_4 and Cu. Contact with the liquid pure form can cause death within h... a) Determine the number of atoms for each element present in the following molecule: CaCl2. A molar volume of gas whose mass is #222*g*mol^-1# is confined in a #22.4*L# container. The molar mass of H2PO4- is 96.99 g/mol. As2(CO3)3. False. a) 5.14 b) 30.97 c) 45.97 d) 90.33 How many grams of potassium dihydrogen phosphate (KH_2PO_4) are there in 0.223 moles? He finds that 6.1 g of fluorine gas is produced. b) How many atoms of iron are in 0.750 moles of the compound iron (III) oxide, Fe2O3? . What is the atomic mass for cadmium? What is the mass of 9.85 10 19 C H 4 molecules? What mass (in mg)does 2.63 moles of nickel have? The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. What is the molar mass of propyl benzoate, C_{10}H_{12}O_2, a common food additive? This gives a ratio in which no number is less than 1. How many oxygen atoms are contained in 1.0 g alum? Suppose you have 0.472 grams of H2PO4-. Calculate the number of mol corresponding to 21.0 g Be. What is the molar mass of each of the following? Write the correct formula and calculate the formula mass for perchloric acid. The molar mass of phosphorus is equal to the mass of 6.02 * 10^23 atoms of phosphorus. C u B r 2 + 2 N a B H 4 2 N a B r + C u + H 2 + B 2 H 6. a. What mass of CO2 will be produced when 125 g of C8H18 react completely in the following equation? How much copper is produced if 0.25 g of copper (II) bromide reacts with an excess of N a B H 4 ? How many formula units are in 19.6 g of magnesium chloride? 9.82 times 10^(-4) mol of Ti. How many moles (of molecules or formula units) are in 32.60 grams of CF2Cl2? The molar mass of glucose is 180 g/mol. Select one: a. How many grams are in 1.36 x 10-3 moles of H2S? Calculate the molarity of the solution by dividing the number of moles of solute by the volume of the solution in liters. Consider the compound FePO4 and answer the following questions: A) What is the name of this compound? Assume the other reactant is in excess. How many millimoles of p-anisaldehyde (M.W. Calcium chloride dihydrate (CaCl2•2H2O) is 147.0 g/mol. If you had 5.00 moles of NaOH, how many grams would you have? How many grams of (NH_4)_2CO_3 are in 0.680 moles of (NH_4)_2CO_3? (a) 17.1 g (b) 6.82 g (c) 8.83 10 22 g (d) 1.03 10 24 g (e) 1.70 10 2 g. You have been given a 200.00 mL canister containing an unidentified gas. Get help with your Molar mass homework. 258 g C. 344 g D. 342 g, Formula mass and molar mass are the same. YOu will have to know the molar mass of the compound. Find the molecular formula for the compound. He isolated the compounds from a mold which had contaminated some of his experiments. a. Hydrogen (H2) is one of the lightest gases whereas tungsten hexafluoride is one of the heaviest. Calculate the percent by mass of N in NH_4NO_2. (a) 22.4 g/mol (b) 56.0 g/mol (c) 58.0 g/mol (d) 10.0 g/mol (e) 1.00 g/mol. A mole of Cd. a. 2C4H10(g) +13O2(g) 8CO2(g) +10H2O(g), Calculate the mass, in grams, of the following sample: 2.7 x 1021 HCN molecules. How many molecules are in 89 g C C l 4 ? The number of grams of NaOH needed to prepare 7.5 ml of a 5.0 M NaOH solution is, What is the mass of 0.00100 mol of caffeine, C8H10N4O2? Identify the molecule. c) Find the formula mass of Na2S. What is the relative formula mass of Copper oxide, Aluminum oxide, and Carbon dioxide? Go ahead and submit it to our experts to be answered. 11.60 mol \\2. How many grams are in 0.658 mol of calcium phosphate, C a 3 ( P O 4 ) 2 ? The mass of the products equals the mass of the reactants how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide In the reaction CH4 + 2O2 —> CO2 + 2H2O How many molecules of (O2) gas enter this reaction? Sciences, Culinary Arts and Personal Citing this page: Generalic, Eni. A.) 136.15) are there in 200 mg? How many moles of calcium are in 5 grams of calcium? Calculate the molar mass of N a 2 S O 4 . Calculate the mass of iodine solid that participates. How many grams of gold (Au) are there in 51.83 moles? 1. The average cup of coffee contains about 125 mg of caffeine, C8H10N4O2. Determine the molar mass of propane: C3H8. The relative atomic mass indicates how many times larger the mass of a given atom is than 1/12 the mass of the 12C carbon isotope. A student titrated a solution containing 3.7066 g of an unknown triprotic, H_3A, to the end point using 28.94 mL of 0.3021 M KOH solution. which is more than 50% oxygen on a molar basis and which is more than 50% oxygen by mass? 2. You dissolve .3g of an acid in a small amount of water. We also acknowledge previous National Science Foundation support under grant numbers 1246120, … Convert 0.1825 moles of strontium nitride to masses in grams. Na2CO3(aq) + 2HCl(aq) arrow 2NaCl(aq) + CO2(g) + H2O(l). 5.27 \times 1025... How many aluminum atoms are there in 319 g of Al2S3? (a) 29.02 g/mole (b) 50.23 g/mole (c) 210.0 g/mole (d) 342.3 g/mole, What is the molar mass of copper(II) sulfate, C u S O 4 ? You have an iron nail which has a mass of 100.0 grams. Let us say you have 2 moles of carbon dioxide and 2 moles of hydrogen in two separate containers, each at standard temperature and a volume of say 5 L. What would the mass of each sample be? Perform the calculation: Molar mass of a gas if its density is 3.6 g/L at 15 degrees C and 825 torr. What is the molar mass of phosphorus, in g/mol? What is the mass of 8.90 moles of magnesium chloride, MgCl_2? a) 60 amu. Services, Working Scholars® Bringing Tuition-Free College to the Community. Cholesterol has been linked to heart disease, so the determination of blood cholesterol can be very important. A. For a gas at standard temperature and pressure with a density of 2.8 g/L, determine its molar mass. Periodic Table of the Elements. A chemist determines by measurements that 0.0700 moles of iodine solid particles into a chemical reaction. 7.90 \times 10^{-1} mol \\4. Find the ratio of the molar masses of tungsten hexafluoride to hydrogen gas. Molar Solubility from Ksp Example 2 VIDEO. H is an element with an atomic mass of 1.07 amu and X in an imaginary eleme... What is the molar mass of the imaginary solid BaNO3? A 2.00 g sample of iron was reacted with 1.00 g bromide. How many moles of each molecule are contained in the following? Write the correct formula and calculate the formula mass for carbon tetrachloride. 2 SO_2 + O_2 to 2 SO_3|. What is the mass of 8.50 x 10^22 molecules of NH3? 1. What information is needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate? (a) Calculate the molar... A dandruff shampoo contains dipyrithione, C10H8N2O2S2, an antibacterial and antifungal agent. One gram of alum, KAl(SO4)2.12H2O, contains 1.3 10^21 Al atoms. Jonathan D. Pewe Carried out an experiment with plant food that contained 0.28 grams of phosphate PO4^3-. What is the formula mass of compound H_2X_3? How many grams of CO2 would burning a gallon of gasoline make? What is the molar mass of (NH4)2CO3? In an experiment, you use 8.700 g of solvent (FP = 92.6 C; Kf = 4.3 C/m) and 0.620 g of solute (molecular mass = 188.94 g/mol). What is the mass of one atom of Carbon 12 in kg? Calculate the mass of iodine solid that participates. Calculate the mass (in grams) of each sample.a) 7.6 x 10^{25} O_3 molecules. What is the molar mass of sucrose? How many moles of O2 are contained in a gas tank that contains 650 grams of oxygen? A lack of this vitamin in the diet can lead to anemia. b. Then add 29.4 mL of .1 M of NaOH. How many grams of nitrogen atoms are present in a sample of each of the following that contains 2.47 moles of oxygen atoms? What is the molecular formula? a. A. It is blue because it contains copper, which is 0.390% of its mass. Which has the largest mass? Na + H2O arrow NaOH + H2. a)80 g b)140g c)320g d)640g e)24 \times 10^{23} g, How many moles of cl atoms are there in 65.2 g CHCl_3? a) 52.0 g/mol b) 34.0 g/mol c) 82.0 g/mol d) 30.0 g/mol, For each compound, write down the correct formula and calculate the formula mass. 64.10 g/mol \\3. A chemist determines by measurements that 0.095 moles of fluorine gas participate in a chemical reaction. Mercury(II) sulfide is insoluble in water. None of these, What is the molar mass of MgCl_2? (a) How many moles are there in 45.0 g of S F 6 ? CH4 + 2O2 --> CO2 + 2H2O. What is the mass in grams in 4.25 moles of Na2CO3? Using Avogadro's number, how many molecules of O_2 are contained in a gas tank that contains 650.0 g of oxygen? How many moles of PbSO_4 are in the bottle? 3.1 mol of water or 0.100 mol of sugar molecules (C_{12}H_{22}O_{11}). Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. A 255 mL gas sample contains argon and nitrogen at a temperature of 65 degrees Celsius. How many atoms of aluminum are in 10.0 g of Al_2O_3? For example, the molecular weight of calcium chloride is 111.0 grams per mole (g/mol), which is the same as the formula weight if the material is anhydrous. Calculate the moles of NaCl in 5.26 grams of NaCl. \\ B) The unknown gas... 6 grams of carbon and four grams of oxygen contain? 221.96 g/mol, What is the mass in grams of 35.24 moles of iron? Enter a chemical formula to calculate its molar mass (e.g. Calculate the mass of silver nitrate (in grams) in a 145 mL solution of 4.31 M AgNO_3. {Date of access}. (a) 31.98 amu (b) 31.98 g/mol (c) 33.99 g/mol (d) 34.00 amu (e) 2.05 10 25 g/mol, A chemical reaction requires 6.00 moles of F e ( N O 3 ) 3 . (b) What is the mass of 0.527 moles of C a ( N O 3 ) 2 ? How many iron atoms are in 27.71 grams of iron? The most common source of copper is chalcopyrite. Calculate the formula mass of H B r O 4 . A chemist determines the amount of fluorine gas produced during an experiment. 58.9 g/mol c. 80.6 g/mol d. 22.4 g/mol e. 43.9 g/mol. a. Calculate the number of moles present in 2.3 grams of zinc. First, write the balanced equation. Laccase is a protein that is found in wood-rotting fungus. What is the molar mass of phosphorus, in g/mol? What is the gas? Find the molar mass of alum (KAl(SO_4)_2 \cdot 12H_2O.). How many grams are in 1.73 mol of dinitrogen pentoxide ( N 2 O 5 )? I recently had my house fumigated with methyl bromide (CH_3Br). Why would determining the molar mass of an acid be important? What is the empirical formula of dipyrithione? Express your answer to two significant figures and include the appropriate units. A mole is defined as 6.0221415 × 1023 molecules (or atoms) of a substance. NH4NO3 → N2O + 2H2O A chemist who is performing this reaction starts with 160.1 g of NH4NO3. Alexander Fleming discovered penicillin, C_{16}H_{18}N_2O_4S, in 1928 at the University of London. The density of krypton gas at 1.2 atm and 50 ^oC is _____ g/L. 574 g. How many moles of Ba(NO3)2 are there in 0.25 L of a 2.00 M Ba(NO3)2 solution?

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