Periodic Trends&Atomic structures
Moles
Covalent and Ionic Bonds
Energy
Calorimetry
100
Describe the shape of each of the following orbitals:
а. 3р
b. 6s
c. 4p
a. dumbbell shape
b. sphere
c. dumbbell shape
100
Calculate the moles of Fe in 5.22 X 1022 atoms of Fe
0.0867 mol of Fe
100
Is this a covalent bond or an ionic bond?
Covalent Bond
100
what is kinetic and potential energy
Kinetic energy is energy possessed by a body by virtue of its movement. Potential energy is the energy possessed by a body by virtue of its position or state.
100
Calorimetry is performed with a help of a..
a. thermometer
b. galvanometer
c. calorimeter
d. ammeter
calorimeter
200
Write the abbreviated electron configuration for barium
[Xe] 6s2
200
Calculate the molar mass for each of the following:
a. AlF
b. CH,Ch
c. SnF2
a. 83.98g
b. 98.95g
c. 156.7g
200
State the number of electrons that must be lost by Li to achieve a stable electron configuration
1
200
Indicate whether each of the following statements describes potential or kinetic energy:
a. water at the top of a waterfall
b. kicking a ball
c. the energy in a lump of coal
d. a skier at the top of a hill
a. Potential
b. Kinetic
c. Potential
d. Potential
200
If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature increase?
7.15 °C
300
use the sublevel blocks on the periodic table to write a complete electron configuration for arsenic
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
300
Calculate the mass, in grams, for 1.50 mol of Na
34.5g
300
Write the ionic formula for Na+ and O2-
Na2O
300
What is the kinetic of a 100g tennis ball being thrown at a speed of 5m/s?
KE= 1.25J
300
How much heat, in joules and in calories, must be added to a 75.0–g iron block with a specific heat of 0.449 J/g °C to increase its temperature from 25 °C to its melting temperature of 1535 °C?
50,800 J
12,200 cal
400
write the valence electron configuration for alkali metals
Ns1
400
Calculate the empirical formula for 3.57 g of N and 2.04 g of O
N2O
400
Write the name for Al2O3
aluminum oxide
400
A breaking force of 1000N is applied by a driver to stop his car. The car covered 50m before it stopped. How much work did the brakes do?
Force x distance
1000N x 50m
50000J
400
A teaspoon of the carbohydrate sucrose (common sugar) contains 16 Calories (16 kcal). What is the mass of one teaspoon of sucrose if the average number of Calories for carbohydrates is 4.1 Calories/g?
3.9 g
500
select the larger atom between Na and Cl
Na
500
Write the empirical formula for H2O2 peroxide
HO
500
Write the formula including the charge for ammonium
NH 4 +
500
The energy needed to keep a 75-watt light bulb burning for 1.0h is 270 kJ. Calculate the energy required to keep the light bulb burning for 3.0h in each of the following energy units:
a. joules
b. kilocalories
a. 8.1 x 105 J
b. 190 kcal
500
When 1.0 g of fructose, C6H12O6(s), a sugar commonly found in fruits, is burned in oxygen in a bomb calorimeter, the temperature of the calorimeter increases by 1.58 °C. If the heat capacity of the calorimeter and its contents is 9.90 kJ/°C, what is q for this combustion?
15.64 kJ