Answer:
A
Explanation:
I used my resources and they was explaining and I came to a resolution that it was A
It has more lines in it compared to hydrogen emission spectrum. It is mainly because the helium atom has more electrons than a hydrogen atom. Therefore, more electrons get excited when we pass a white light beam through a helium sample, and it causes the emission of more spectral lines
<span>The mass of an object is measured in either grams or kilograms. Mass is best described as the amount of matter, or "stuff," in a solid, and is different from weight (which is the force of gravity on an object). Since mass is used with solids, it will be measured in grams or kilograms (rather than in something like liters, which would be used with the volume of a liquid). To measure mass, you can use a balance, for example a triple balance beam.</span>
B. A gram would have a lot more molecules of propane than a mole
<span>The answer is D)<em> </em>are compounds that have the same number and types of atoms but are arranged differently.
Source: <em>just took the test :)</em></span>
