Answer:
light energy is a form of electromagnetic radiations of a wavelength, which can be seen by the human eye.
The orange pigment carotene absorbs the orange wavelength of light very poorly, which makes the leaves appear orange.
An ionic bond. covalent bonds do not conduct in a solid or a liquid state, ionic bonds conduct in a liquid state and not in a solid state.
Answer:
Object 1 = Moving Towards Earth
Object 2 = Moving Away From Earth
Object 3 = Moving Towards Earth
Explanation:
When you look at emission spectras, look at where the observed lines are in comparison to the element (stationary) lines. Ones that have observed lines closer to the left are moving towards you and ones with observed lines closer to the right are moving away from you.
There are <u>0.408 grams</u><u> </u>of sodium fluoride in the toothpaste.
Why?
We know that there is 0.24% of sodium floride in a 170 grams toothpaste tube. Since the only information related to the toothpaste is its mass, we can assume that the 0.24% (concentration) is referring to the mass percent, and we can calculate it using the following equation:

Now, substituting the given information and calculating, we have:


We have that there are 0.408 grams of sodium fluoride in the toothpaste.
Have a nice day!