Calculate the amount of heat needed to boil 56.2 g of octane (CgH₁g), beginning from a temperature of 66.4 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. S alb

The normal bolling point of liquid diethyl ether is 308 K. Assuming that its molar heat of vaporization is constant at 28.1 kl/mol, the boiling point of C₂O₂, when the external pressure is 0.717 atm is Submit Answer Try Another Version 1 Item attempt remaining

Select all covalent network solids Select 2 correct answer(s) ) LiF O C(m) | Si |H2O NaCl

Question 13 What is the name of the set up shown below? Is the thermometer positioned properly? Distillation apparatus, No Reflux Apparatus, Yes Reflux Apparatus, No Distillation apparatus, Yes Jadilans

Pressure is inversely proportionate to ____________. A. temperature B. the number of moles C. the number of atoms D. volume

A sample of argon gas at a pressure of 762 mm Hg and a temperature of 22 °C, occupies a volume of 11.1 liters. If the gas is cooled at constant pressure to a temperature of -1 °C, the volume of the gas sample will be Submit Answer Try Another Version 10 item attempts remaining

The solidification temperature of mercury is -39ºC. On the Kelvin scale, this temperature corresponds to: a) -234K b) 173 K c) -173K d) 234K e) 312 K

question 4

1 5 .17 Scenario 2 The airbags in vehicles contain a mixture of NaN, KNO, and SiO,. When pace, an electrical signal goes to the gas generator inside the airbag, triggering a series of three chemical reactions: car decelerates at a rapid 3' 10NAN - 10Na + 2KNO, K,O + Na o+ Na + SiO, - K,SiO, 10Na + 15N,(g) KO + 5Na O + N .(g) These reactions produce gas (N,) to fill the airbag and convert sodium azide (NaN ), a highly toxic substance, to alkaline silicate (K,SiO,). The quantity of NaN, must be carefully calculated to ensure that the volume of gas is adequate to fill the airbag firmly enough to protect the passenger but not overfill and cause the bag to explode. A standard airbag needs 67 L of N, (g) to properly inflate. ker notes

Select the product(s) that form(s) when propyl isobutyrate is treated with each of the following sets of reagents. a. H2O, NaOH, heat (Select all that apply.) OH SOH OH OH