2.1130 grams of an unknown liquid compound was found to occupy 305 mL at 757 torr and 100ºC. (a) Find its approximate molar mass using the same approach as you did for today’s experiment. (b) On analysis, the compound is found to consist of 49.3% C, 12.3% H, and the rest is nitrogen. Find its empirical formula.

Q: How many grams of carbon must have been present if 5.186 dm3 of carbon monoxide was produced at…

A:

Q: What is the volume of methane at 273 K and 760 torr, if its original volume at 300 K and 769 torrs…

A: Given,

Q: If 1.47x10^-3 mol of argon occupies a 75.0-mL container at 26°C, what is the pressure (in torr)?

A: The ideal gas equation is PV= nRT Where,  P= pressure (atm) V= volume (L) R= Universal Gas Constant…

Q: 3. How many moles of hydrogen are present in a 37.5-mL sample at 22.0°C and 749 torr? Assume the…

A: Answer = 1.525 x 10-3

Q: A sample of a gas weighs 2.85 g and has a volume of 1001 mL at 715.0 torr and 20.0 °C. What is its…

A: The given mass of a sample of gas is 2.85 g. The given pressure is 715.0 torr.It is known that 1…

Q: At 30oC, a gas cylinder containing nitrogen has an internal volume and pressure of 58.5 L and 1.75 *…

A: All matter can be classified as solid, liquid and gases mainly. In these physical states of matter,…

Q: Suppose the O, gas evolved by a certain chemical reaction taking place at 50.0 Cis collected over…

A: Given: Temperature = 50oC Volume of gas collected in the collection tube = 118 mL To determine: Mass…

Q: What volume, in mL, would 1.00 grams of N2(g) occupy at a temperature of 18.5 oC and a pressure of…

A: Given, Mass of N2 gas (m) = 1.00 g Temperature of a gas (T) = 18.5 oC = (273.15 + 18.5) K = 291.65 K…

Q: A) A sample of ideal gas at room temperature occupies a volume of 40.0 L at a pressure of 542 torr .…

A: Boyle’ law states that at a particular temperature and number of moles, the pressure of a gas is…

Q: If 22.5L of nitrogen at 748mm Hg are compressed to 725mm Hg at constant temperature, what is the new…

A: According to Boyle’s law:

Q: A cylinder contains a mixture of 2735 grams of carbon dioxide and oxygen, if the volume of the…

A: The effect of pressure and temperature is measured by Boyle’s law and Charles's law respectively.…

Q: In 2.00 min, 29.7 mL of He effuse through a small hole. Under the same conditions of pressure and…

A: The term number of moles of a given chemical species can be defined as the ratio of its mass to the…

Q: What must be the new volume of a sample of nitrogen (in L) if 2.68 L at 745 torr and 24.00C is…

A: Given,Volume of nitrogen sample (V1) = 2.68L.Pressure (P1) = 745torr.Temperature (T1) =…

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: Given Temperature = 25 oC = (273+25)K = 298 K Pressure = 705 torr = 705/760 = 0.927 atm Volume = 285…

Q: When zinc metal reacts with excess aqueous hydrochloric acid, zinc chloride is formed along with…

A: Given :-  Volume of H2 gas = 750 mL  Temperature = 30°C  Pressure = 742 torr  To calculate :-…

Q: A sample of Zn(s) is reacted with HCl(aq) to form hydrogen gas. The H2 gas bubbles out of aqueous…

A: Zinc metal ( Zn )  reacts with Hydrochloric acid ( HCl ) to produce Zinc chloride ( ZnCl2 ) and…

Q: 50.0 g

A: Moles of propane = ( mass / molar mass )  Moles of propane = ( 50.0g / 44.1gmol-1 )  Moles of…

Q: What is the molecular mass (in amu) of a gaseous element if 4.40 g occupies 3.20 L at 555.23 torr…

A: Given: Mass of the gas = 4.40 g The volume of the gas = 3.20 L Pressure = 555.23 torr Temperature =…

Q: What is the root mean speed in m/s of Kr at 15°C? (write the solution without decimals)

A:

Q: 2. What mass of chlorine gas, Cl2 in grams, is contained in a 10.0 L tank at 27°C and 3.50 atm of…

A: Using ideal gas equation PV=nRT ,we can find mass of chlorine gas produce.

Q: A sample of nitrogen gas has a volume of 3.61 Lat 29°C. What volume will it occupy at 289 K if the…

A: Use ideal gas equation at constant pressure and moles.

Q: Calculate the density of propane gas at 780 torr and 40 0C.

A: Ideal gas law states that the product of volume (L) and pressure (atm) is equal to the product of…

Q: At what temperature does the speed of carbon dioxide molecules, CO2, equal 350.0 m/sec?

A:

Q: A sample of ideal gas at room temperature occupies a volume of 40.0 L at a pressure of 442 torr . If…

A:

Q: What is the volume, in liters, of 4.00  moles of methane gas, CH4, at 18 Celsius and 1.40atm

A: Given, Number of moles of  methane (CH4) gas =4.00 molpressure of gas =1.40 atmtemperature of gas…

Q: At 741 torr and 44 oC, 7.10 g of a gas occupies a volume of 5.40 L. What is the molar mass of the…

A: We have given that  Pressure = P = 741 torr = 741×1760atm = 0.975 atm   Temperature = T = 44 +…

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: Given the chemical reaction for the prepration of chlorine as…

Q: A sample of Zn(s) is reacted with HCl(aq) to form hydrogen gas. The H2 gas bubbles out of aqueous…

A: The balanced equation for the reaction of Zn(s) with HCl(aq) is: Zn(s) + 2HCl(aq)  ---->…

Q: Hemoglobin is the protein that transports O₂ through the blood from the lungs to the rest of the…

A: Given,

Q: What is the temperature (in °C) of an 11.8 L sample of carbon monoxide, CO, at 747 torr if it…

A: Given: V1 = 11.8 L V2 = 12.9 L T2 = 57.0oC T1 = ?

Q: What is the molar mass of a compound if a gaseous sample has a density of 2.483 g/L at 30 °C and 662…

A:

Q: A chemist vaporizes a liquid compound and determines its density to be 1.585 g/Lat 90.0 °C and 753…

A: Given density of liquid vapour is 1.585 g/L. Given temperature is 90.0° C. Given pressure is 753…

Q: Calculate the root-mean-square speeds of CO2 molecules and He atoms at 20 °C.

A: Root mean square speeds of CO2 and He has to be calculated.

Q: A chemical reaction occurring in a cylinder equipped with a moveable piston produces 0.641 mol of a…

A:

Q: At 741 torr and 44 °C, 7.10 g of a gas occupy a volume of 5.40 L. What is the molar mass of the gas?

A: Using the ideal gas equation, given the pressure, temperature, mass and volume of the gas, where R…

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: Given balanced equation is MnO2(s) + 4HCl(aq) ------> MnCl2(aq) + 2H2O(l) + Cl2(g) From balanced…

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A:

Q: What volume of O2(g) measured at 25 °C and 760 torr is required to react with 17.0 L of ethylene,…

A:

Q: 2. A 0.0758 gram sample of aluminum metal was reacted with dilute sulfuric acid and the hydrogen…

A: As per the given data,Given mass of aluminum metal = 0.0758 gMolar mass of aluminum metal = 26.9815…

Q: What is the molar mass of a gas, in g/mol, if 286 mL at 69 oC and 17.9 Torr pressure weighs 0.0156…

A:

Q: The atmosphere of Mars is mostly CO2 (molar mass 44.0 g/mol) under a pressure of 650 Pa, which we…

A: Introduction :  We have to calculate RMS and density .

Q: What is the molar mass of a gas if 0.282 g of the gas occupies a volume of 250 mL at a temperature…

A:

Q: What pressure was exerted on the inflated beach ball for it to change its volume from 25.0-liters at…

A:

Q: If a 7.00 gram sample of molecular nitrogen at 10 c occupies 2.50l, what is the pressure of the…

A: The pressure in the given question can be determined by using ideal gas equation- PV = nRT.…

Q: Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: The ideal gas equation shows the relation between pressure, volume, temperature and no of moles of…

Q: A compound has the empirical formula CHBr. A 256-mL flask, at 373 K and 750. torr, contains 1.53 g…

A: Given: Empirical formula: CHBr Volume = 256 mL Temperature = 373 K Pressure = 750 torr = 0.9868 atm…

Q: chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric…

A: Given:Volume = 145 mL = 0.145 L.Temperature = 25 oC = 298 KPressure = 735 torr = 0.9671 atm.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.