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STatiana [176]
2 years ago
14

How many atoms are there in 2.43 g of calcium?

Chemistry
1 answer:
Evgen [1.6K]2 years ago
3 0

Answer:

Explanation:

We're asked to calculate the number of atoms of

Ca

in

153

g Ca

.

What we must first do is convert the given mass of calcium to moles of calcium, using its molar mass (referring to a periodic table, this is

40.08

g

mol

):

153

g Ca

(

1

mol Ca

40.08

g Ca

)

=

3.82

mol Ca

Using Avogadro's number,

6.022

×

10

23

particles

mol

, we can calculate the number of atoms present:

3.82

mol Ca

(

6.022

×

10

23

atoms Ca

1

mol Ca

)

=

2.30

×

10

24

atoms Ca

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3 years ago
How many atoms are there in 5.00 mol of sulphur (S)?
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Answer:

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<u>Chemistry - Atomic Structure</u>

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Explanation:

<u>Step 1: Define</u>

5.00 mol S

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<u />

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A student titrates a solution containing 0.050 moles of calcium hydroxide with phosphoric acid. How many moles of phosphoric aci
lina2011 [118]

Answer:

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Explanation:

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moles of H₃PO₄ = ?

Process

1.- Write the balanced chemical equation

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2.- Calculate the moles of phosphoric acid

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