balancing chemical equations/types of reactions
balance the chemical equation that involves the reaction of hydrogen sulfide with atmospheric oxygen gas. What is the ratio of molecules from left to right?
_ H2S (g) + _ O2 (g) ----->_SO2 (g) + _ H2O (g)
2:3:2:2 ratio of molecules
How many atoms of potassium does 1 mole of potassium contain?
what is 6.022 x 1023 atoms
determine the number of moles of ethanol (C2H5OH) in 47.0 grams.
what is 1.02 moles of Ethanol
true/false Boyle's law states that the volume of a fixed amount of gas held at a constant temperature varies inversely with the pressure.
what is true
true or false
A mole ratio is a ratio between the number of atoms of any two substances in a balanced chemical equation.
what is false
a mole ratio is a ratio between the number of moles of any two substances in a balanced chemical equation.
Balance the following chemical equation that includes the following reactions between reactants and products.
_ CO2 (g) + _ H2O (l) ---->_ C6H12O6 (s) + _O2 (g)
6 CO2 + 6H2O -----> 1 C6H12O6 + 6O2
which has more mass, a mole of arsenic or a mole of zinc? explain your answer
the molar mass of of arsenic is 74.922 g/mol; the molar mass of zinc is 65.39 g/mol. thus, a mole of As has a greater mass than Zn.
determine the number of atoms in 50 moles of Calcium?
what is 3.01 x 1025 atoms of calcium
Using Charles's Law a gas at 89 degrees celsius occupies a volume of 0.67 L. At what celsius temperature will the volume increase to 1.12 L ?
what is 330 degrees celsius
If 5.50 mol of calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene(C2H2), a gas used in welding, will be produced?
CaC2 (s) + 2H2O (l) ---> Ca(OH)2 (aq) + C2H2 (g)
what is 5.50 moles of C2H2
A reaction in which the atoms of one element replace the atoms of another element in a compound is called .................................
What is a single-replacement reaction
explain how you would convert from the number of atoms of a specific element to its mass in (grams).
what is first convert the number of atoms to moles, the multiply moles of the element by the molar mass of the element.
What is the mass in (grams) 0.0450moles of CuCl2 ?
what is 6.05 grams of CuCl2
using Gay-Lussac's Law
A unknown gas in a sealed container has a pressure of 125 kPa at a temperature of 30 degrees celsius. If the pressure in the container is increased to 201 kPa, what is the new temperature?
****temperature has to be in Kelvin****
what is temperature of 487 K
true or false
A substance that dissolves in a solvent is said to be insoluble in that solvent.
what is false
a substance that dissolves is said to be soluble in that solvent
a chemical reaction in which two or more substances (A + B) react to produce a single product (AB). What is the name of this reaction?
what is Synthesis reaction
Explain how you determine the molar mass of glucose (C6H12O6).
molar mass is determined by multiplying the molar mass of each element present in the compound by its subscript and then adding these values.
molar mass of glucose is 180.0 grams/mol
Benzoyl peroxide (C14H10O4) is a substance used as an acne medicine. What is the mass in grams of 0.0350 moles C14H10O4 ?
what is 8.48 grams
using the ideal gas law to answer this question,
How many moles of Helium gas (He) would be required to fill a 22-L container at a temperature of 35 degrees celsius and a pressure of 3.1 atm?
what is 2.7 moles of Helium gas
calculate the molarity of 1.60 L of a solution containing 1.55 grams of dissolved KBr.
what is 0.00813-M or 8.13 x 10-3 M
Balance this chemical equation with the following reaction:
__(NH4)2Cr2O7 (s) -------> _Cr2O3 (s) + _ N2 (g) + H2O (g)
1(NH4)2Cr2O7 (s) ------> 1Cr2O7 + 1 N2 + 4 H2O
Determine the molar mass of Ammonium nitrate (NH4NO3).
what is 80 g/mol of Ammonium nitrate
Acetaminophen, a common aspirin substitute, has the formula C8H9NO2 ? Determine the number of molecules of acetaminophen in a 500-mg(.500-g) tablet.
what is 2.0 x 1021 molecules
Using the ideal gas law,
A 2.00-L flask is filled with ethane gas(C2H6) from a small cylinder with a pressure of 1.08 atm and a temperature of 15 degrees celsius. What is the mass of the ethane in the flask?
what is 2.75 grams of ethane
Chloroform (CHCl3) an important solvent, is produced by a reaction between methane and chlorine.
CH4 (g) + 3Cl2 (g) ----> CHCl3 (g) + 3HCl (g)
How much CH4, in grams, is needed to produce 50.0 grams of CHCl3 ?
what is 6.72 grams of CH4