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3 years ago

Balance the following reaction: NaOH + HCI ->NaCI +H2O

Chemistry

1 answer:

Fiesta28 [93]3 years ago

3 0

The chemical reaction is balanced.

Explanation:

We have the following chemical reaction:

NaOH + HCl → NaCl + H₂O

It is a neutralization reaction between a base and an acid which produce a salt and water.

To balance the chemical reaction the number and type of atoms entering the reaction have to be equal to the number and type of atoms leaving the reaction. We do that to conserve the mass.

We do not need to add other stoechiometric coefficients because the reaction is already balanced.

1 Na atom is entering the reaction and 1 Na atom is leaving the reaction

1 Cl atom is entering the reaction and 1 Cl is leaving the reaction

1 O atom is entering the reaction and 1 O atom is leaving the reaction

2 H atoms are entering the reaction and 2 H atoms are leaving the reaction

Learn more about:

balancing chemical reactions

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What is the difference in mass between 3.01×10^24 atoms of gold and a gold bar with the dimensions 6.00 cm X 4.25 cm X 2.00 cm

Zanzabum

Answer:

The difference in mass between 3.01×10^24 atoms of gold and a gold bar with the dimensions 6.00 cm X 4.25 cm X 2.00 cm is :

Difference in mass = 985.32 - 984.5 = 0.82 g

Explanation:

Part I :

$n =\frac{3.01\times 10^{24}}{6.022\times 10^{23}}$

n = 4.9983

n = 4.99 moles

(Note : You can also take n = 5 mole )

Molar mass of gold = 196.96 g/mole

This means, 1 mole of gold(Au) contain = 196.96 grams

So, 4.99 moles of gold contain = $5\times 196.96$ g

4.99 moles of gold contain = 984.8 g

Mass of ${3.01\times 10^{24}}$ atoms of gold = 984.5 g

Part II :

Density of Gold = $19.32 g/cm^{3}$

Volume of the cuboid = $length\times breadth\times height$

Volume of the gold bar = $6.00\times 4.25\times 2.00$

Volume of the gold bar = 51 $cm^{3}$

Using formula,

$Density = \frac{mass}{Volume}$

$Mass = Density\times Volume$

$Mass = 19.32 \times 51$

Mass = 985.32 g

So, A gold bar with the dimensions 6.00 cm X 4.25 cm X 2.00 cm has mass of 985.32 g

Difference in mass = 985.32 - 984.5 = 0.82 g

3 0

3 years ago

Ca+HCI—>CaCI2+H2, what is the reaction?

arsen [322]

Answer:

single replacement reaction

Explanation:

This is a kind of single replacement reaction where you switch either cations or anions. Here you switched Ca for H and produced Cacl2 and H2 gas by itself.

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Balance the following reaction: NaOH + HCI ->NaCI +H2O​

Balance the following reaction: NaOH + HCI ->NaCI +H2O