Name That Formula
Presented below is the ideal gas law formula, identify (if any) the errors associated with it?
PV = r2t where t = temperature in farenheit
PV = nRT
where T = temperature in Kelvin
Write the full electron configuration for Helium
1s2
What is the mole ratio of water to hydrogen gas?
H2 + O2 -------> H2O
*hint: is the equation balanced?*
The correct answer is 1
2/2 = 1
What is the specific hear of an alloy if 4210 joules are required to raise the temperature of a 30 g sample by 180°C?
0.78 J/g°C
Hydrogen gas is a diatomic molecule. The bond holding these two hydrogen atoms together is known as a?
nonpolar covlaent bond
What does n stand for in the following formula?
P1 / n1 = P2 / n2
n stands for the number of moles of gas.
What is the full electron configuration for Lithium?
1s22s1
2 Al (s) + 3 Cl2 (g) --> 2 AlCl3 (s)
You have 12 grams of solid aluminium that you react with excess chlorine gas, how many grams of aluminum chloride will you produce?
69 grams of aluminium chloride will be produced when reacted with excess chlorine gas.
An alloy has a specific heat of 1.25 cal/g°C and is at 25 °C. When it is dropped into warm water, the alloy absorbs 750 cal of heat. If the final temperature of the alloy is 75 °C, what is its mass?
A sample of argon has a volume of 5.0 dm3 and the pressure is 0.92 atm. If the final temperature is 30.° C, the final volume is 5.7 L, and the final pressure is 800. mm Hg, what was the initial temperature of the argon?
-41° C
q = (M) (C) (Delta T)
the following formula is used to calculate ?
if the value of q is calculated and it comes out to be negative, what kind of reaction has occurred?
Amount of heat transferred
Exothermic reaction has occurred.
How many valence electrons are in the following element?
[Ar] 4s23d3
five valence electrons are present
4NH3 + 5O2 -------> 4NO + 6H2O
DAILY DOUBLE!!! BEEP BEEP
the following combustion reaction releases 6.63 x 104 kilojoules of heat, how many picojoules of energy would be released if you started ith 5.53 grams of ammonia gas?
5.39 x 10 17 picojoules of energy are released.
What happens to average kinetic energy as the temperature increases?
DAILY DOUBLE BEEP BEEP
increases
Which has a larger atomic radius? Elemental Iron or Iron 3+
Elemental Iron
What is STP?
What are it values?
Convert these values to mmHg and Kelvin
750 mmHg and 273 degrees K
Noble Gases are known for being inert, what is it about their atomic structure that prevents them from reacting with other elements?
What is the name of this particular rule ?
Name three noble gases
Their outer shell is completely filled with 8 electrons so they do not want to react with other elements because they do not need to give up or take any more electrons.
Octet Rule.
helium, neon, argon, krypton, xenon, radon
2 Al (s) + 6 HCl (aq) --> 2 AlCl3 (aq) + 3 H3 (g)
The following reaction is exothermic. if 1.26 x 108 microjoules of energy are consumed when 6 moles of HCl reacts with 2 moles of Al. how many grams of aluminum is produced when 3.3 grams of aluminum chloride reacts with excess hydrogen gas?
0.67 grams
2 C2H3OH (l) + 9 O2 (g) -----------> 6 CO2 (g) + 8 H2O (g) + heat
is the following reaction endothermic or exothermic?
exothermic
An empty flask has a mass of 47.392 g and 47.816 g when filled with acetone vapor at 100.° C and 745 mm Hg. If the volume of the flask is 247.3 mL, what is the molar mass of the acetone?
53.6 g/mol
The formula to calculate FORMAL CHARGE is as follows?
Valence Electrons - [Lone Pair Electrons + (# of Bonds)]
Write the electron configuration for Fe3+ ion
Write the noble has electron configuration for elemental Fe (not an ion)
1s22s22p63s23p63d5
[Ar] 3d6 4s2
How many moles of oxygen gas are needed to completely combust 12 grams of methane?
*hint write the balanced equation*
CH4(g)+2O2(g)→CO2(g)+2H2O(g)
1.5 moles of oxygen gas.
750.0 g of water that was just boiled (heated to 100.0 /C) loses 78.45 kJ of heat as it cools. What is the final temperature of the water?
75.0 Celsius
Boron Tetrafluoride is a chemical compound.
Find the formal charge of the Boron and then the formal charge of the overall molecule
+1
boron alone -1 charge.