OK,lisen to me slowly,
all define you.all thing
1.Look at peridoic table which one is solid or others.
For example:hydrogen is air.
And you gonna explain what is hydrogen,
2.After look periodic table you will be able to know every element.
3.Dont forget to check your homework.!!
Http://www.wasatch.edu/cms/lib/UT01000315/Centricity/Domain/647/dilution%20problems%20answers.pdf it would be question 5 if you can read it.
Answer: 0.0450 moles of
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.
To calculate the moles, we use the equation:
Thus there are 0.0450 moles of
Helium is found in the 1st period of the periodic table. It also is part of the noble gases group in the last column (18th) of the table.