A mass of one atom of carbon is about 2 x 10^-23 grams and the mass of an oxygen atom is about 2.66x10^-23 grams. A molecule of carbon dioxide gas(CO2) has two atoms of oxygen and one atom of carbon.

(a) Calculate the mass of one carbon dioxide molecule.

(b) Calculate the number of molecules in 1 gram of carbon dioxide gas.
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Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?