Yes... that is correct.
CH4 is methane so the coefficent in front of it would double the number of atoms of each element
The answer is D. Use the equation PV=nRT
P=(.567mol)(.0821)(300K)/4.5L
78 protons are found in platinum(pt).
D should be the correct answer. isotopes are atoms that have the same atomic number (number of protons) but different atomic masses (number of protons and neutrons). isotopes also have the same number of electrons since atoms need to have equal numbers of protons and electrons to not be considered ions. Since the number of protons determines the chemical properties of the atom, we can say that all isotopes have the same chemical properties due to the fact that all isotopes have the same atomic number.
I hope this helps. Let me know in the comments if anything is unclear.
<span>The water cycle has no starting point. But, we'll begin in the oceans, since that is where most of Earth's water exists</span>