A sample of water has a volume of 24.0 milliliters and a density of 0.992 g/mL. What is its mass? 1) 23.8 g 2) 24.2 g 3) NONE

23.8

Explanation:

The formula for density is D=M/V, where D stands for density, M stands for mass, and V stands for volume. In this case, we are solving for mass, so we have to cross multiply the equation to isolate the variable of M. Once we cross multiply, we get the equation M=DV, and then we start to substitute the values into the equation. M=(.992g/mL)(24.0mL) is the equation, and once we multiply, we get 23.808 as the answer. But when figuring out density, mass, or volume, we need to utilize sig figs. Since the two numbers that you are multiplying both have 3 sig figs, the answer must have three sig figs. Round up or down based on the place value that you are rounding to. Since we are trying to get an answer that is in the tenths place, we round down to 23.8, which is the answer.

8 carbon atoms forming single bonds with 18 hydrogen atoms; a triple bond exists between the third and fourth carbon atom from the right

explanation:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-