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3 years ago

How many grams are in 7.32 x 1023 molecules of potassium carbonate (K2CO3)?

Chemistry

1 answer:

tiny-mole [99]3 years ago

7 0

(I leave off the x10^23 because they both will divide out) Use your per

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What is the approximate total number of atoms in 1.0 mole of lithium?

chubhunter [2.5K]

Answer:

6.0 x 10 to the power of 23

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3 years ago

Write a complete, balanced equation for the following reactions:

Sergeu [11.5K]

Answer:

Solution given:

e) The heating of sodium carbonate to produces sodium oxide and carbon dioxide

Solution given:

Balanced chemical equation:

$\boxed{\bold{\green{Na_{2}CO_{2} +heat \rightarrow Na_{2}O +CO_{2}}}}$

when sodium carbonate is heated it decomposed and form sodium oxide and carbon dioxide

f) chromium (III) hydroxide plus sulfuric acid

Balanced chemical equation:

$\boxed{\bold{\green{2Cr(OH)_{3}+ 3H_{2}SO_{4} → Cr_{2}(SO_{4})_{3} + 6H_{2}O}}}$

When chromium (III) hydroxide react with sulfuric acid double displacement takes place and forms produce chromium(III) sulfate and water.

g) aluminum metal plus chlorine gas

$\boxed{\bold{\green{2Al(s) + 3Cl_2(g) \rightarrow 2AlCl_2 }}}$

When aluminum metal is added to chlorine gas Combination reaction takes place and forms aluminum chloride.

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3 years ago

Read 2 more answers

How many molecules are there in 223 grams of Na2SO4?

Harlamova29_29 [7]

<h3>Answer;</h3>

= 9.45 × 10^23 molecules

<h3>Explanation; </h3>

The molar mass of Na2SO4 = 142.04 g/mol

Number of moles = mass/molar mass

= 223/142.04

= 1.57 moles

But;

1 mole = 6.02 × 10^23 molecules

Therefore;

1.57 moles = ?

= 1.57 × 6.02 × 10^23 molecules

= 9.45 × 10^23 molecules 

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3 years ago

Calculate the volume (in mL) of a 2.75 M solution that must be used to make 1.25L of a 0.150 M solution.

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3 years ago

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Avogadro’s number was calculated by determining the number of atoms in

statuscvo [17]

Answer is: 12 grams of the isotope carbon-12 (¹²C).

The Avogadro’s number is the number of atoms in 12 grams of the isotope carbon-12 (¹²C).

Na is Avogadro number or Avogadro constant (the number of particles, in this example carbon, that are contained in the amount of substance given by one mole).

The Avogadro number has value 6.022·10²³ 1/mol in the International System of Units; Na = 6.022·10²³ 1/mol.

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3 years ago

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