<span>The chloroplasts.
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Answer:
Most igneous, metamorphic, and sedimentary rocks contain rubidium (Rb) and strontium (Sr) in detectable amounts. However, the concentrations of these elements are almost always less than 1 percent, and they are therefore rarely determined in routine chemical analyses. Neither rubidium nor strontium is a major constituent in the common rock-forming silicate minerals, although strontium does form a carbonate (strontianite) and a sulfate (celestite) which are found in some hydrothermal deposits and certain sedimentary rocks, particularly carbonates.
Explanation:
Answer:
23.1%
Explanation:
To find the weight percent (aka. mass percent), you need to use the following equation:
mass of solute (g)
Weight Percent = ---------------------------------- x 100%
mass of solution (g)
In this case, the solute is sugar and the solution is the sugar and water. You can find the weight percent by plugging the given values into the equation and solving. The final answer should have 3 sig figs like the given values.
mass of solute = 15.0 g
mass of solution = 15.0 g + 50.0 g = 65.0 g
15.0 g solute
Weight Percent = ------------------------- x 100%
65.0 g soln
Weight Percent = 0.231 x 100%
Weight Percent = 23.1%
The answer is B) 0.012 dekameters (dkm)
Protons and neutrons
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