How many moles of Pb are in 9.3*10^15 atoms of Pb?
Determining the limiting reactant based on the chemical equation and the available quantity of the reactants.
For the balanced reaction: N2H4 + 2H2O2 = N2 + 4H2O 12.0 g N2H4 is reacted with 23.0 g H2O2. Which is the limiting reactant?
Balancing a chemical equation and calculating the reactant quantity based on the reaction stoichiometry.
Balance the following equation: Cu(s)+ AgNO3(aq) = Ag(s) + Cu(NO3)2(aq) ("s" and "aq" in parantheses refers to the phase of the reactants and products, i.e. solid and aqueous, respectively.) What is the amount of Cu (in grams) necessary to precipitate 0.50 g of Ag in the presence of excess AgNO3?
A compound contains carbon, hydrogen, and oxygen. A 10 g sample is analyzed for carbon and hydrogen. It contains 1.315 g hydrogen and 5.213 g carbon. What is the empirical formula for this compound?
Determine the mass of lithium hydroxide produced when 0.38 g of lithium nitride reacts with water according to the following equation: Mass-Mass Li3N + 3 H2O ---> NH3 + 3LiOH
A copper coin has a mass of 3 g. What is the total charge of all the electrons in it ? Given that the atomic number of Cu is Z = 29 and the atomic mass is 63.5 g/mole.
Calculate the amount of gold deposited (in grams) from a solution of Au3+ if the electrolysis lasted 30 minutes at a current of 5.00A.
What are the products of the following radioactive decays? A. Alpha emission by: 162 Re 75 B. Beta emission by: 188 W 74 C. Positron emission by: 165 Ta 73
The following reaction is used in laboratories to produce oxygen: 2KclO3 (s) ----> 2KCl (s) + 3O2 (g) At 25 degrees Celsius and one atmosphere pressure, how many liters of O2 gas will be produced from the reaction of 165g of KClO3? See attachment for better equation.
The National Drinking Water standard for lead is no more than 0.015ppm. If a particular water supply sample has 2.5x10-7 moles of Pb per 5.0 liters, is it suitable for drinking?
1. Find out 2 or 3 uses for mercury. 2. For each use find out why mercury was chosen for the job 3. What are the dangers from using mercury.
How many moles of oxygen gas will react with 6.2 mol Al in the following reaction? 4Al + 3O2 -> 2Al2O3.
Which substance contains the greatest mass of bromine? a) 60.0g NaBrO3 b) 30.0g MgBr2 c) 5.0g HBrO4 d) 0.10 mol KBr e) 0.10 mol HBr
Burning 2.00g of propane, C3H8, produces 99.78 kJ of energy. How much energy is produced when one mole of the propane burns?
Determining the number of grams required by a reactant to produce a set number of grams of the product.
Oxygen gas can be prepared in a Laboratory by the reaction: 2KClO3(s) => 2KCl(s) + 3O2(g) How many grams of KClO3 must be reacted to produce100g of O2?
Convert 1) 75 mg/dL to mg/L 2) 592 uL to mL 3) What is the molarity of 45.0 g of NaCl dissolved in 1 L of water?