molar ratio
2 H2 + O2---> 2 H2O
What is the molar ratio between H2and O2?
two to one. So this ratio is written as a fraction
is 2/1
What is the formula mass for the following:
AgNO2
153.9
Sodium chloride ,NaCl,
2Na(s) + Cl2 ----> 2NaCl (s)
How many moles of NaCl result from the complete reaction of 3.4 mol of Cl2? Assume that there is more than enough Na.
6.8 mol NaCl
How many moles are in 15 grams of lithium?
2.2 moles Li
How are the terms "molar mass" and "atomic mass" are different from each other
Molar mass is used to describe thye mass of one mole of a chemical compound ,
atomic mass describes the mass of one mole of an element or the mass of one atom of an element.
2 H2 + O2---> 2 H2O
What is the molar ratio between O2and H2O?
one to two. As a fraction, it is:
1/2
What is the formula mass for the following: HgSO4
296.7
Water H2O
O2 (g) + 2H2(g) ----> 2H2O (g)
How many moles of H2O result from the complete reaction of 24.6mol of O2? Assume that there is more than enough H2
49.2 mol H2O
How many grams are in 2.4 moles of sulfur?
77 g Sulfur
What unit you use to express the molar mass
grams/mole
Following each equation are two requests for
molar ratios from the equation.
1) N2 + 3 H2 ---> 2 NH3
Write the molar ratios for:
N2 to H2 and NH3 to H2
1/3 2/3
What is the formula mass of :
K3PO4
212.3
Methane CH4 ,
CH4(g) + 2O2 ----> CO2 (g) + 2 H2O(g)
How many moles of Methane if we have 4 moles of O2
2
How many grams are in 4.5 moles of sodium fluoride, NaF?
190g NaF
define chemical reaction
is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
2 SO2 + O2 ---> 2 SO3
Write the molar ratios for:
O2 to SO3 and O2 to SO2
1/2 1/2
What is the formula mass of the following :
Fe(NO3)3
241.9
How many moles in 28 grams of Co2?
0.64 mol Co2
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
1.26 moles Al(OH)3
mass conservation
states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
4) 4 NH3+ 3 O2 ---> 2 N2 + 6 H2O
Write the molar ratios for
NH3 to N2 and H2O to O2
2/1 2/1