Q!
HCN lethal dose = 300 mg / kg of air
D = 0.00118 g /cm3; T = 26°C = 299 K
if
V = 12*15*9.7 ft3 = 1746 ft3
V = (1746 ft3) * 28.3168 L / ft3 = 49441.21 L = 49441.21*10^3 mL
mass of air = D*V = ( 49441.21*10^3 mL)*0.00118 g/mL = 58340.6278 g of air
kg of air = 58340.6278/!000 = 58.34 kg of air
so we need --> mass of HCN --> 300 mg / kg of air * 58.34 kg = 17502 mg of HCN will make this toxic
B)
mass of NaCH will do lethal those
mol of HCN = mass/MW = (17502 /1000)/(27.0253 ) = 0.6476 mol of HCN
then...
2 mol of HCN = 2 mol of NaCN
0.6476 mol o fHCN = 0.6476 mol o fNaCN
mass of NaCN = mol*MW = 0.6476*49.0072 = 31.7370 g of NaCN will give a letahl those
Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300. mg HCN per...
Hydrogen Cyanide Poisoning Part A Calculate the amount of HCN that gives the lethal dose in a small laboratory room measuring 12.0 ftx 15.0 ft × 960ft. Hydrogen cyanide, HCN, is a poisonous gas. The ethal dose is approximately 300. mg kilogram of air when inhaled. The density of air at 26。C is 0.00118 g/cm" per Express your answer to three significant figures and include the appropriate units. Hints Value Units
please box the answer and units <CH 04 HW 60f9 Hydrogen Cyanide Poisoning Constants Periodic Table Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300 mg HCN per kilogram of air when inhaled. The density of air at 26°C is 0.00118 g/cm Part A Calculate the amount of HCN that gives the lethal dose in a small laboratory room measuring 12.0 ft x 15.0 ft x 8.50ft. Express your answer to three significant figures and include...
Part A Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person or animal that ingests it. The median lethal dose of KCN for a person weighing 145 lb (65.8 kg ) is 7.27×10−3 mol . What volume of a 0.0820 M KCN solution contains 7.27×10−3 mol of KCN? Part B Gastric acid pH can range from 1 to 4, and most of the acid is HCl. For a sample of stomach...
Part B If 160. mg of fluorine-18 is shipped at 7:00 A M, how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4 10 PM? Express the mass to three significant figures and include the appropriate units m Value Units Provide Feedback Part B If 160. mg of fluorine-18 is shipped at 7:00 A M, how many milligrams of the radioisotope are still active when the sample arrives at the radiology...
Part B Gastric acid pH can range from 1 to 4, and most of the acid is HCI. For a sample of stomach acid that is 6.95x10- Min HCl, how many moles of HCl are in 12.9 mL of the stomach acid? Express the amount to three significant figures and include the appropriate units. View Available Hint(s) DHMÄ ? amount of HC1 = Value Units Submit The concentrations of solution are typically described as a ratio of the amount of...
the uniform girder AB has a mass of 6.4 Mg. A crane gives <Homework 11 - Attempt 1 Problem 17.30 - Enhanced - with Hints and Feedback The uniform girder AB has a mass of 6.4 Mg. A crane gives it an upward acceleration of 3 m/s . (Figure 1) Figure < 1 of 1 > 3 m/s Type here to search Part A Determine the magnitude of the internal axial loading at the center of the girder. Express your...
The world burns approximately 3.8×1012 kg of fossil fuel per year. Part A: Use the combustion of octane as the representative reaction and determine the mass of carbon dioxide (the most significant greenhouse gas) formed per year. Express your answer to two significant figures and include the appropriate units. Part B: The current concentration of carbon dioxide in the atmosphere is approximately 380 ppm (by volume). By what percentage does the concentration increase each year due to fossil fuel combustion?...
Chemists often use molarity M, in moles/liter, to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room temperature, about 20∘C. A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by...
Week 7 Homework ± Convert between Units of Concentration 25 of 29 Review | Constants | Periodic Table Chemists often use molarity MM, in moles/litermoles/liter, to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume. Volume markings for most laboratory glassware are calibrated for room...
Chemists often use molarity M, in moles/liter, to measure the concentration of solutions Molarity is a common unt of concentration because the volume of a liquid is very easy to measure. However, the drawback of using molarity is that volume is a temperature-dependent quantity. As temperature changes, density changes, which affects volume Volume markings for most laboratory glassware are calibrated for room temperature, about 20°C Fortunately, there are several other ways of expressing concentration that do not involve volume and...