The density of water at 40 degrees C is 0.992 g/mL. What is the volume (mL) of 3.60 g of water at this temperature?
3.63 mL
200
Balance the following chemical equation:
NaHCO3 --> Na2CO3 +H2O +CO2
2NaHCO3 --> Na2CO3 + H2O + CO2
200
H3O(+)
Hydronium
300
Name HIO3 (aq)
Iodic acid
300
What is the definition of combustion?
Rapid chemical combination with O2 (oxidation)
300
Convert 0.0345 g of C to moles
2.87 x 10^-3 mol C
300
Silicon tetrachloride (SiCl4) can be prepared by heating Si in chlorine gas:
Si(s) + 2Cl2(g) ---> SiCl4(l)
In one reaction, 0.507 mol of SiCl4 is produced. How many moles of molecular chlorine were used in the reaction?
1.01 mol Cl2
300
ClO2(-)
Chlorite
400
Name KMnO4
Potassium permanganate
400
Which classic experiment disproved Thompson's "plum pudding" or "chocolate chip cookie" model of the atom? Who performed this experiment?
Rutherford's gold foil experiment
400
Convert 3.42 g of Boron (B) to molecules
1.91 x 10^23 molecules boron
3.24 g x (1 mol/10.81 g) x (6.022 x 10^23 molecules/1 mol)
400
Consider the combustion of butane (C4H10):
2C4H10(g) + 13O2(g) ---> 8CO2(g) + 10H2O(l)
In a reaction, 5.0 mol of butane react with an excess of O2. Calculate the number of moles of CO2 formed
2.0 x 10^1 mol CO2
400
SO4(2-)
Sulfate
500
Write the name of (NH4)2HPO3
Ammonium hydrogen phosphite
500
Classify each of the following as a hypothesis, law, or theory: (a) The force acting on an object is equal to its mass times its acceleration (b) There are many civilizations more advanced than ours on other planets
(a) Law - a concise verbal or mathematical statement of a reliable relationship between phenomena
(b) Hypothesis - a tentative explanation for a set of observations
500
What is the mass in grams of 3 molecules of (NH4)2Cr2O7
1 x 10^-21 g
500
Menthol contains C, H, and O. In one combustion analysis, 10.00 mg of the substance yields 11.53 mg H2O and 28.16 mg CO2. What is the empirical formula of methanol?