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An element has 25 protons in its nucleus.
(a) Is the element a metal, a nonmetal, or a metalloid?
(b) On the basis of the average atomic mass, write the symbol for the element's most abundant isotope.
(c) How many neutrons are in the isotope you described in part (b)?
(d) How many electrons are in atoms of this element?
(e) How many times heavier than 12C is the average atom of this element?
What is the total pressure, in mmHg, of a gas mixture containing argon gas at 0.25 atm, helium gas at 350 mmHg, and nitrogen gas at 360 torr
What is the predicted pH of the following: 0.1M HCl, 0.01M HCl, 0.001M HCl, 0.1M HC2H202, 0.1 M HC2H3O2, 0.1 M NH4Cl, deonized water
The concentration of CO2 in a soft drink bottled with a partial pressure of CO2 of 6.5 atm over the liquid at 29°C is 2.2 × 10-1 M. Determine the Henry's law constant for CO2 at this temperature.
find out the molecular formula and empirical of this compound and determined to contain 4.36 grams of phosphorus and 5.64 grams of oxygen
Benzoic acid is a weak acid that has antimicrobial properties. Its sodium salt, sodium benzoate, is a preservative found in foods, medications, and personal hygiene products. Benzoic acid dissociates in water: C6H5COOH C6H5COO- + H+
What is the initial sulfur dioxide concentration (in mol/L or M)?
A reactant is identified in the context of a redox reaction as an oxidizing agent. Which of the follow statements is false. this reactant is a reactant for the reduction half-reaction
A solution containing 10g of a non-ionic compound in 90g water has a freezing point of -3.33 degrees C. Given that Kf = 1.86 degrees C/m for water
Draw the structure of the two tertiary (3°) alcohols with the molecular formula C7H16O that contain a one-carbon branch
A reaction vessel contains these compounds at equilibrium. What will happen if the volume of the container is reduced by 50% at constant temperature.
The heat energy required to melt 1.00 g of ice at 0 degrees C is 333J. If one ice cube has a mass of 62.0 g, and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of ice cubes to form liquid water at 0 degrees C
Provide a Lewis structure, including resonance if appropriate, and non zero formal charge, for ICl2-
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