Questions tagged 'Chemistry'
452 questions
How many moles of aluminum were used? (The density of aluminum is 2.699g/cm3 .)?
A piece of aluminum foil measuring 1.15 cm on each side and 0.570 cm thick is allowed to react with bromine to form aluminum bromide. How many moles of aluminum were used in this reaction? Given that...
How many moles of Pb are in 4.71 x 10^21 Pb atoms?
How many moles of lead (Pb) are present in 4.71 x 10^21 atoms of Pb? I have calculated possible answers, which include 0.00782, 2.84 x 10^45, 207.2, and 6.022 x 10^23. Could you help me determine the...
Predict the products of each of these reactions and write
Predict the products of each of the following reactions and write balanced complete ionic and net ionic equations for each. If no reaction occurs, please indicate "NO REACTION." NaI(aq) + Hg2(NO3)2(...
Feb 19, 2025
Consider the following elementary steps that make up the mechanism of a certain reaction: 3A→B+C B+2D→C+F Part A What is the overall
Consider the following elementary steps that make up the mechanism of a certain reaction: (3A \rightarrow B + C) (B + 2D \rightarrow C + F) Part A: What is the overall reaction? Please express...
Heat of neutralization question?
How do the heats of reaction for the neutralization of NaOH with hydrochloric acid (HCl) and acetic acid compare? I have observed that the values from my data are nearly identical. Is this expected? P...
How many grams of Phosgenite can be obtained…..?
How many grams of phosgenite can be obtained from 14.5 g of PbO and 14.5 g of NaCl in the presence of excess water and CO2? The balanced equation is as follows: 2PbO + 2NaCl + H2O + CO2 = Pb2Cl2CO3 +...
Consider the following reaction. 2H2 + O2 —> 2H2O. Change of H(rxn) = -484kJ.?
Consider the following reaction: 2H₂ + O₂ → 2H₂O, with a change in enthalpy (ΔH) of -484 kJ. Which answer best describes the heat transfer that occurs when 1.5 moles of H₂ react? a. 726 kJ absorbed...
Predict the bond formed between each of the following pairs of atoms is ionic, nonpolar or polar covalent?
Determine the type of bond (ionic, nonpolar covalent, or polar covalent) formed between the following pairs of atoms: a) Sulfur (S) and Oxygen (O) in SO₃ b) Silicon (Si) and Phosphorus (P) c) Calciu...
how many moles of KF are contained in 347g of water in a 0.175 m KF solution?PLEASE HELP, have been struggling with the last past hour.?
How many moles of KF are contained in 347 g of water in a 0.175 m KF solution? I would appreciate any assistance, as I have been struggling with this problem for the past hour. Thank you!
According to Chemistry Regents Reference Table F, which of the following compounds will form a saturated solution that is most dilute?
According to Chemistry Regents Reference Table F, which of the following compounds will form the most dilute saturated solution? The options are: ammonium chloride, calcium carbonate, potassium iodide...