is this answer correct even though above it says n for nano = 10^-9 and m for milli = 10^-3?

The label on a bale of mulch indicates a volume of 1.45 ft3. The label also states that the mulch in the bale will cover an area of a garden 6 ft 6 ft to a depth of 1 in. Account for the discrepancy in the given volumes.

Which of the following represent physical properties or changes, and which represent chemical properties or changes? You curl your hair with a curling iron. You curl your hair by getting a “permanent wave” at the hair salon. Ice on your sidewalk melts when you put salt on it. A glass of water evaporates overnight when it is left on the bedside table. Your steak chars if the skillet is too hot. Alcohol feels cool when it is spilled on the skin. Alcohol ignites when a flame is brought near it. Baking powder causes biscuits to rise.

Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water are immiscible liquids; that is, they do not dissolve in one another. You place 10 mL of each in a graduated cylinder, along with pieces of high-density polyethylene (HDPE, density = 0.97 g/cm3), polyvinyl chloride(PVC, density = 1.36 g/cm3), and Teflon (density = 2.3 g/cm3). None of these common plastics dissolves in these liquids. Describe what you expect to see.

What is the volume of liquid in the buret in the illustration? Note that the volumes on a buret, expressed in milliliters, are sequenced in the opposite direction of a graduated cylinder.

Does the answer need 2 sig figs or 3?

(7.211*10^5)*(5.3413*10^4)/4.09*10^-7

An electric current of 0.650 A flows for 1.0 second. Calculate the amount of electric, charge transported.. Be sure your answer has the correct unit symbol and 2 significant digits. 0 x10 ロ・ロ X μ = 5.:.

O. In chemistry, the particles of matter that we encounter are quite small. The size of atoms were once given in a unit called the angstrom unit (Aº). One angstrom is defined as 1 x 10-10 meters. The angstrom is not an SI unit. The radius of a chlorine atom is 0/99 Aº What is the radius of the chlorine atom expressed in a) nanometers and b) picometers?

A student performed an analysis of a sample for its calcium content andgot the following results:                              14.92%             14.91%              14.88%        14.91%The actual amount of calcium in the .sample is 15.70%. What conclusions can you draw about the accuracy and precision of these results?