Now let's suppose it's your turn to be the professor. You want to write a question for your students using theoretical data. Suppose you want their "unknown liquid" to be toluene (molar mass = 92.1 g/mol). Using the data in the table below, what should the "mass of flask + unknown condensed liquid" be so that they can correctly identify toluene as their unknown? Mass of flask: 77.485 g Mass of flask + unknown condensed liquid: ????? Temperature of water bath: 100 °C Pressure of gas in our system: 0.997 atm Volume of gas in our system: 255 mL Group of answer choices: A) 78.250 B) 0.765 C) 1.04 g D) 78.525 g

Q: In a common laboratory experiment in general chemistry, students are asked to determine the relative…

A: To find: A method for separating two compounds of the given mixture.

Q: To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.800…

A: Concentration of recommended fluoride in drinking water = 0.800ppm Diameter of the tank = 4.00 x 102…

Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: This question can be solved using simple subtraction.

Q: What is the mass of H2SO4 in a 48.1 cm3 sample of concentrated sulfuric acid that has a density of…

A: The given question is related to analytical chemistry. The mass of any compound is equal to…

Q: (a) Palladium (Pd) is an element with properties similar to those of platinum. It is useful in…

A: Given : Mass of bar = 96.03 g Length of bar = 10.7 cm Diameter of bar = 9.82 mm = 0.982 cm…

Q: Substance AB2 is 60% A by mass.  What is the percent A by mass for substance AB?  Justify your…

A: Law of definite proportions: It states that chemical compounds has formed always in a fixed ratio. 1…

Q: How many mL of (5.0300x10^0) M NaNO3 would be needed in a dilution experiment to make (8.56x10^2) mL…

A: Given-> Initial molarity (M1) = 5.0300 ×100M Final molarity (M2) = 2.3400 ×100 M Final volume…

Q: A chemist has two different gasohol mixtures available. One contains 20% alcohol and the other 12%…

A:

Q: What is the Mass pf Cl- found in the water sample (in grams)? %(w/w) Cl- in the water sample?…

A: Given data,Mass of titrant(AgNO3) used in trial 1=0.76gMass of AgNO3 used in trial 2=0.73gMass of…

Q: Using the available data in the graph (below), calculate the percent by mass of Potassium Bromide in…

A: Percentage by mass is a method to represent the concentration of any solution, and it s defined as…

Q: How many grams of ethanol are there in a liter-volume of wine (D = 0.934 g/mL) that is 12.0% by mass…

A: Given: Density of wine = 0.934 g/mL. Volume of wine = 1 L = 1000 mL

Q: Please assist with number 3

A: We are authorized to answer three subparts at a time since you have not mentioned which part you are…

Q: About Sampling, tick only the incorrect alternative(s). Choose one or more: A) Identifying the…

A: Analysis are of two types: qualitative analysis and quantitative analysis. Qualitative analysis…

Q: Cocaine (C17H21O4N; Figure 2) is a natural substance found in leaves of the coca plant, which have…

A: Given: The density of the hydrochloride salt of cocaine = 2.50 kg/L The density of pure cocaine =…

Q: the mole is a common unit of measurement in chemistry you mat not be faniliar with mikes but one of…

A: Given : Mass of water i.e H2O = 290 g And mass of 1 mole of water = 18 g

Q: Be sure to answer all parts. Fermentation is a complex chemical process of wine making in which…

A:

Q: in a pure sample of blue vitriol, the Cu content is 25.45%. what is the percentage of water?

A:

Q: A student obtained the data below after performing a similar experiment described in this…

A: Mass of hydrated salt = mass of crucible, cover and hydrate - mass of crucible and cover. So, Mass…

Q: C. Naphthalene, C1,Hg, the chemical used in mothballs, can be isolated from the naphtha fraction of…

A: Since the whole mass contain 10 molecules of naphthalene. In solid state they are stick together and…

Q: When is sieving and fractional distillation a good method for separating mixtures? Cite an example.

A: Sieving- It is a technique for separating particles of different sizes by using a sieve. For…

Q: 2. The picture in the introduction shows that the mass of a crucible and lid was determined to be…

A: Given,  The mass of Crucible and lid = 22.1504 g.  The mass of crucible and lid  and hydrate =…

Q: How many grams of water must be used to prepare a 2.50 percent by mass (%m/m) sodium hydroxide…

A:

Q: When Kay added 30 g of hydrochloric acid (HCI) to 65 g of Zn, bubbles appeared and a white…

A: We know, when Zn reacts with HCl, it will produce ZnCl2 and H2 following the reaction  Zn + 2HCl…

Q: You record the following data during the Qualitative and Quantitative Characterization of Aspirin…

A: A numerical problem based on concentration terms, which is to be accomplished.

Q: A student obtained the data below after performing a similar experiment described in this…

A:

Q: Consider the reaction: 2 NH3(g) + 3 N20(g) → 4 N2(g) + 3 H20(1) 112 g of NH3 reacts with 215 g of…

A: From the reaction it is clear that 2 mole NH3 reacts with 3 mole N2O.  Molecular weight of NH3 and…

Q: Suppose now that you wanted to determine the density of a small crystal to confirm that it is…

A: total volume = 20.0 mL volume of CHCl3 = x volume of CHBr3 = 20 - x total mass = 20 x 2.07 = 41.4 g…

Q: 2. A particular brand of beef jerky contains 0.0552 % sodium nitrite (NaNO2) by mass and is sold in…

A: Given: % NaNO2=0.0552 % 1 bag contains 8 oz sample Mass of sample= 8 x 28.35 g =226.8 g

Q: compounds. Then, a major shift happened. How did chemists increase the rate of discovery of the…

A: Antoine Lavoisier first one who tried to group the elements as metals and nonmetals. Then Wolfang…

Q: Substance AB2 is 60% A by mass.  What is the percent A by mass for substance AB?  Justify your…

A: For given compound AB2, 60% by mass is A then obviously 40% is B. That is for 100g of given…

Q: 50.0 mL 2.00M HCI and 50.0 mL 2.00 M NaOH mixed: HCI(aq) + NaOH(aq) → H,0() + NaCI(aq) - Csoln =…

A: In just above step of  circled part, we have calculated the total heat released during the reaction…

Q: In the picture below, determine how many atoms with a radius of 37pm can fit into a 1.00" box.…

A: Given: The radius of the hydrogen atom is 37 pm. To find: Number of atoms

Q: One of the inherently satisfying features of chemistry is that chemical materials form and interact…

A:

Q: Commercial ibuprofen tablets contain 200 mg of ibuprofen each. The commercial tablets have the…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Q5. As part of the aspirin synthesis lab, the orgo students also had to perform the following…

A:

Q: Given your experience in mass determinations and volumetric glassware, which factor used in…

A: The density can be determined by using the following formula,

Q: Suppose you need 6.5 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A:

Q: 1.28 x 1023 molecules of C10H22 would have what number of carbon atoms? 6.

A:

Q: Valuable minerals (chemicals) can be obtained from ores, which are natually occuring mixtures. One…

A: Given : Mass percent of magnetite in ore = 38 % Mass percent of iron in magnetite = 72.4 % And mass…

Q: If the tax on alcohol is Php 500 per proof gallon, how much tax must be paid on 5 gallons of alcohol…

A:

Q: A drink recipe calls for 600 grams of sugar, 6 liters of water, and 3 package of flavoring. While…

A: Limiting Reagent concept is used wherever one ingredient is limited.

Q: In doing the chemical formula experiment, the mass of original sample of compound was 2.438 g, and…

A: Mass of original sample = Mass of copper in it + Mass of chlorine in it

Q: Question attached

A: The weight of 136 washers and number of washers in 118 g should be calculated.

Q: How many moles of NaOH are in 26.27 mL of 1.4 M NAOH? Do NOT place the answer in scientific notation…

A:

Q: Saponification is a process in which soap is produced from the chemical reaction between  animal fat…

A:

Q: Welders use helium (He) and argon (Ar) gases to blow over the metal during the welding process.  Why…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: Crime scene investigators keep a wide variety of compounds on hand to help with identifying unknown…

A: Elemental analysis of the compound revealed that it contains  63.57% carbon 6.000% hydrogen 9.267%…

Q: A solution is made using 250.0 mL of ethanol (density 0.7892 g/mL) and 369.1 mL of water (density…

A:

Q: Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has…

A: (a)Edge length of the cubic container is given as 25 nm.  So volume of one nanocontainer can be…

Q: Avogadro’s number is so large that the only way to visualize it is through analogies. For example,…

A: Given : Entire volume of US = 6.9 X 109 Km3  And volume of one orange = 1.4 X 10-14 Km3  Since the…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".