Chemical Formulas
What type of chemical formula shows the arrangement of the atoms?
Structural
What type of reaction only has one product?
Synthesis
What is the gram formula mass of O2?
32g/mol
What is the ratio of moles of NO and O2 in the following reaction?
2NO + O2 -> 2NO2
2:1
What can be said about the chemical and physical properties of O2 and O3?
They are different
What is the empirical formula for P6O14?
P3O7
What type of reaction is this?
NaCl + MgBr2 -> NaBr + MgCl2
Double Replacement
What is the gram formula mass of Mg(NO3)2?
148.32g/mol
How many moles of NaCl are produced when 5.0 moles of HCl react with excess Na?
Na + 2HCl -> H2 + NaCl
2.5mols
How many atoms are in 1 mole of Ne?
6.02x1023
Give a possible molecular formula for CH2O
C2H4O2, etc.
Balance this equation:
CH4 + O2 -> CO2 + H2O
CH4 + 2O2 -> CO2 + 2H2O
What is the percent composition of chlorine in HCl?
97%
How many grams of KCl are produced when 5.2moles of CaCl2 react with KOH?
CaCl2 + 2KOH -> Ca(OH)2 + 2KCl
780g
Which of these has the same number of molecules as 2.7L of CO2(g)?
a) 1.35L of CO2(g)
b) 2.7moles of O2(g)
c) 5.4moles of NO2(g)
d) 2.7L of N2(g)
d) 2.7L of N2(g)
What is the molecular formula for a substance with an empirical formula of CH and a molecular mass 36g/mol?
C3H3
Find the missing product and balance the equation:
HCl + Mg -> ______ + H2
2HCl + Mg -> MgCl2 + H2
What is the percent mass of hydrogen in CH4?
25%
How many liters of O2 are required to produce 36g of CO2?
2C3H6 + 9O2 -> 6CO2 + 6H2O
27L
A hydrate with a mass of 6.10g was heated to a constant mass of 4.65g. What is the percent mass of the water in the hydrate?
23.77%
What is the molecular formula for a substance with an empirical formula PO4 and a molecular mass of 380g/mol?
P4O16
Find the missing product and balance the reaction
Al(NO3)3 + Na2SO4 -> NaNO3 + _________
2Al(NO3)3 + 3Na2SO4 -> 6NaNO3 + Al2(SO4)3
How many moles are in 62.0g of Ca(NO3)2?
0.378mols
How many moles of C2H8 are needed to make 43g of H2O?
2C2H6 + 7O2 -> 4CO2 + 6H2O
0.80mols
Using the information below, find the percent mass of water in the hydrate.
Crucible - 12.27g
Crucible + Hydrate - 13.02g
Crucible + Anhydrous Salt - 12.94g
10.7%