Show:
Balancing Equations
Naming Compounds
Using Stoich
Molarity
Random Questions
100
__Na2O + __HCl --> __H2O +__ NaCl
1, 2, 1, 2
100
CO2
Carbon dioxide
100
How many grams are 2.5 moles of H2O?
45 grams
100
What is the molarity of 2 moles of HCl in 2.5 Liters of H2O?
0.8 Molar
100
what is the molar mass of NaOH?
about 40 grams/mole
200
__ HBr + __ KHCO3 --> __ H2O + __ KBr + __ CO2
1, 1, 1, 1, 1
200
Sodium sulfate
Na2SO4
200
Using the following reaction, predict how many moles of H2 will be produced if you start with 4 moles of HCl: _Zn + _HCl --> _ZnCl2 + _H2
2 moles
200
What is the molarity of 20 grams of calcium ions dissolved in 745 mL of H2O?
0.67 Molar
200
Find the Molar Mass: H3PO4
98 grams/mole
300
Balance the following: __ N2 + __ F2 --> __ NF3
1, 3, 2
300
trinitrogen disulfide
N3S2
300
100 grams of MgSO4 is how many moles?
0.8308 moles
300
I have a KOH solution with a molarity of 1.25. How many grams would be dissolved in 200 mL of it?
14.025 grams
300
A covalent bond involves the _______ of electrons.
Sharing
400
Balance the following formula: _C3H8 + _O2 --> _CO2 + _H2O
1, 5, 3, 4
400
FeS
Iron (II) sulfate
400
If there is 50 grams of NF3 produced, how much F2 did you start with? _ N2 + _ F2 --> _ NF3
40.13 grams
400
What volume would you need to obtain .5 moles from a .30 Molar solution?
1.67 Liters
400
A redox reaction involves the _________ of electrons.
Transfer
500
Balance the following: __ GaBr3 + __ Na2SO3 --> __ Ga2(SO3)3 + __ NaBr
2, 3, 1, 6
500
Cobalt (IV) bromide
CoBr4
500
Using the following reaction, predict the amount (in grams) of product that you will form if you start with 150 grams of H2 in excess of N2: _N2 + _H2 --> _NH3
about 1700 grams
500
500 mL of an unknown chemical is labeled 'Molarity=0.65'. In an experiment you evaporate the water off, and are left with 19 grams of the substance. The substance is known to contain chlorine (by qualitative means). What is the unknown chemical?
NaCl
500
What are the products of an acid-base reaction?
water and a salt