Answered

IDNLearn.com connects you with a community of knowledgeable individuals ready to help. Discover reliable and timely information on any topic from our network of experienced professionals.

Calculate the number of moles in 15 atoms

The total mass of the 15 atoms above is
2.09 ×10−21 g . Calculate the mass, in grams, of one atom.

Calculate the molar mass of the atoms above and, using the periodic table, identify the element.

Calculate the mass of 5.00 moles of the above atom.

Please help giving brainliest out and be detailed and explain


Sagot :

Indrawboyidn

N = n x No

No = avogadro's number = 6.02 x 10²³

n = N / No

n = 15 / 6.02 x 10²³

n = 2.49 x 10⁻²³ moles

the mass of one atom:

2.09 x 10⁻²¹ : 15 = 1.393 x 10⁻²² g

molar mass(MM) of the element:

MM = mass : mole

MM = 1.393 x 10⁻²² : 2.49 x 10⁻²³

MM = 5.594 = 6

the closest is Lithium

Mass for 5 moles:

mass = mole x molar mass

mass = 5 x 5.594

mass = 27.97 g

Thank you for participating in our discussion. We value every contribution. Keep sharing knowledge and helping others find the answers they need. Let's create a dynamic and informative learning environment together. Thank you for trusting IDNLearn.com with your questions. Visit us again for clear, concise, and accurate answers.