Which of the following measurements is expressed in three significant figures?

A. 420 mL of hydrochloric acid

B. 0.003 g of vitamin D

C. 622.00 kg of sulfur

D. 0.201 L of nitrogen gas

1. What structural property of sodium 4-amino-1-naphthalenesulfonate makes it very soluble in water? 2. You will have to look up the structure of this compound and comment on why it is water-soluble. Simply stating that it's polar

Which of the following elements would you expect to have the lowest ionization energy value, and why? Fluorine (F), because it is a halogen that naturally forms a negative ion Lithium (Li), because it has a low effective nuclear charge and large

Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of MgBr2 in 850.0 g of water

Which of the following explains the increase in reaction rate caused by raising the temperature or raising the pressure of a system? a) surface area theory b) activation energy theory c) potential energy theory d) collision theory

What must be true for a car to move forward at a constant speed? The forward fore of the car is ... ?

How does a salt bridge improve a battery

Hat information is needed to determine the energy of an electron in a many-electron atom?

Write the formulas for the following compounds: (a) copper (l) cyanide, (b) strontium chlorite, (c) perbromic acid, (d) hydroiodic acid, (e) disodium ammonium phosphate, (f) potassium dihydrogen phosphate, (g) iodine heptafluoride, (h)

Name a complex salt used in silver-playing.

10. In what part of the world might you find Mystery Island (note: you will be given full-credit for simply attempting this question and you will find the actual answer in your teacher's feedback). Do not answer!