chapter 6
Identify is KNO3 is soluble or insoluble in solution
balance the following equation
KOH +HBr -->KBr + H2O
KOH +HBr -->KBr + H2O
balanced
What is the relationship of variables in Charles law
temperature and volume are directly related when pressure is constant
endo- or exo- thermic process?
A chemical reaction in a calorimeter absorbs heat
endothermic
Rank the strength of Van Der Waal's forces from weakest to strongest
London dispersion forces, dipole forces, hydrogen bonding
Acetaminophen, C8H9NO2, is a covalent compound and the active ingredient in several popular
nonprescription pain medications, such as Tylenol. What is the molecular mass (amu) for this compound?
151.17 amu
What 2 products form given the following reactants? Also give the balanced equation
KBr + Fe(OH)3-->
3KBr + Fe(OH)3--> 3KOH +FeBr3
What is STP defined as?
1 atm
endo- or exo- thermic process?
Heat flows from the system to the surroundings
exothermic
At high altitudes, the atmospheric pressure is lower than at sea level. How does this affect the boiling point of water?
decreases it; At lower external pressure, water vaporizes more easily, so it boils at a lower temperature.
What is the mass percentage of iron in the compound iron(III) oxide?
69.94%
Which is the limiting reactant when 5.00 g of H2 and 10.0 g of O2 react and form water?
Oxygen is the limiting reagent
A typical barometric pressure in Kansas City is 740 torr. What is this pressure in atmospheres?
0.974 atm
A 100-g sample of aluminum (c=0.90 J/g °C)and a 100-g sample of copper (c=0.39 J/g °C) are both heated with the same amount of energy.
Which metal will reach a higher temperature, and why?
Copper will reach the higher temperature because it has the lower specific heat, meaning it requires less energy per gram to raise its temperature.
ICl and Br2 have similar masses. Which will have the higher boiling point
ICl; it is a polar molecule
What is the concentration of the solution that results from diluting 25.0 mL of a 2.04-M solution of
CH3OH to 500.0 mL?
0.102 M
AgNO₃ + KCl → AgCl + KNO₃
AgNO₃(aq) + KCl(aq) → AgCl(s) + KNO₃(aq)
Ag⁺(aq) + Cl⁻(aq) → AgCl(s)
How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atmospheres and a temperature of 340 K?
9.89
How much heat, in joules, must be added to a 502 g iron skillet to increase its temperature from 25 °C to
250 °C? The specific heat of iron is 0.449 J/g °C
5.07 x 104 J
On the board or a piece of paper draw a phase change diagram for all three phase transitions
solid--> melting-->liquid-->evaporation-->gas