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A very tired, very cold teacher filled her 500 g coffee mug with 1 L of hot coffee to help her warm up and get throw the day. Being the middle of winter, the mug was very cold, starting at 3.00 C. If the mug had a specific heat of 0.98 J/G C, and coffee has roughly the same specific heat as liquid water, what was the initial temperature of the coffee if the mug’s final temperature was 35.0 C?
Calculate the molality of a 19% HF aqueous solution. What is the ppm of HF in this solution?
Determine the mass percentage and ppm of a 0.333m NaCl solution.
Calculate the molarity of a 0.85m lithium chloride aqueous solution having a density of 1.44 g/mL
in terms of molecular forces explain why we see this general tent in boiling points for compounds of equivalent formula mass. how does the presence of a dipole moment affect the strength of intermolecular interaction?
At STP, which of the following would have the same number of molecules at 1 L of C2H4 gas? Assume that each behaves as an ideal gas
Use the following balanced equation:
Na2SiO3 (s) + 8 HF(aq) → H2SiF6 (aq) + 2 NaF(aq) + 3 H2O (l)
How many grams of Na2SiO3 can react with 2.800 g of HF
. Student “X” identifies H2Δ2π3 as the conjugate base of the HΔ2π3- anion. Please provide a detailed explanation (in your own words) whether student “X” is incorrect or correct. (The chemical is made of the symbols Δ and π intentionally).
How many grams of 40% solution of hydrochloride acid are needed to react completely with 0.0943 moles of cuprous sulfide
hello, I need to know how many carbon-carbon bonds there are in the chemical structure of alprazolam, as well as how many carbon-heteroatoms and present and what heteroatoms are present. Please help
Why would reactants at the beginning of a chemical reaction weigh the same as the product at the end?
When 1.017 g of pure sodium metal is added to 125.0 mL of distilled water, the temperature of the water changes from 18.6 °C to 30.2°C. Water is in excess. The reaction is: (5 marks)
Na (s) + H2O (l) → NaOH (aq) + ½ H2 (g) ΔH = ?
Calculate the molar enthalpy of sodium as is dissolves in water ( ΔHr) Show a complete, organized solution including all units and the final answer rounded to the correct number of significant digits.
