3 years ago

I need help I have to pass to graduate

Chemistry

1 answer:

andreev551 [17]3 years ago

5 0

I don’t know off the top of my head but just look at a periodic table (most elements are metal anyway)

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2 years ago

The maximum number of orbits in an atom is _____. -three -five -seven -nine

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Read 2 more answers

How many atoms are in 578g Na

borishaifa [10]

1.51 x 10²⁵atoms

Explanation:

Given parameters:

Mass of Na = 578g

Unknown:

Number of atoms = ?

Solution:

To find the number of atoms, we must first find the number of moles the given mass contains.

Number of moles = $\frac{mass}{molar mass}$

molar mass of Na = 23g

Number of moles = $\frac{578}{23}$ = 25.13moles

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25.13 mole of Na = 25.13 x 6.02 x 10²³atoms

This gives 1.51 x 10²⁵atoms of Na

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3 years ago

What volume will 20.0g of Argon occupy at STP?

Yuki888 [10]

Molar mass Argon = 39.948 g/mol

1 mol ------ 39.948 g
mol ----- 20.0 g

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= 0.5006 moles

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3 years ago

How many moles in 30.0 grams of h3po4

jok3333 [9.3K]

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3 years ago