Chemistry

What is the pH of a solution that is 0.40 M HClO and 1.0 M HCOOH? K_(a(HClO))=3.5times 10^-8 K_(a(HCOOH))=1.77times 10^-4 pH=[?] Be careful to note which acid dissociates more. You may assume you can neglect change in X.

Which of the following bonds is the strongest?(1 point) hydrogen bonds valence bonds covalent bonds metallic bonds

11. When gathering glassware and equipment for an experiment, you should A. read all directions carefully to know what equipment is necessary B. examine all glassware to check for chips or cracks C. clean any glassware that appears dirty D. all of the above

1. Calculate the number of atoms in 3 moles of magnesium (Mg).

Use the periodic table to answer the question: Which of these is the correct electron configuration for titanium (Ti)? 1s^22s^22p^63s^23p^64s^23 1s^22s^22p^63s^23p^63d^4 1s^22s^22p^63s^23p^64s^24

Why might the percentage yield be above 100% a) The precipitation was not complete b) The product is not completely dry c) The unknown compound contained some impurities d) Some product was stuck on the filter paper

What is the electron pair geometry for a phosphine molecule, PH_(3) tetrahedral linear trigonal pyramidal bent none of the above

Stones are used in the laboratory to adjust appliances. True False

Which of the following bonds is the strongest?(1 point) covalent bonds valence bonds hydrogen bonds metallic bonds

Technician A says gasoline and kerosene are typical cleaning agents used to clean hands of grease and other automotive chemicals Technician B says your hands are very porous and easily absorb solvents on contact. Who is correct? Select one: a. Technician A b. Technician B c. Both A and B d. Neither A nor B