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1 year ago

PLEASE HELP CHEMISTRY

Chemistry

1 answer:

eduard1 year ago

7 0

When sodium carbonate is dissolved in water, the equation is $Na_2CO_3 (s) --- > 2Na^+ (aq) + CO_3^{2-} (aq)$ .

When carbon dioxide is placed in water, aqueous carbon dioxide is formed: $CO_2 (g) --- > CO_2(aq)$

<h3>Dissolution of compounds in water</h3>

Some compounds are water-soluble, some are just partially soluble, while others are insoluble in water. Some soluble or partially soluble substances dissociate in water into their component ions. These substances are said to be ionic.

Sodium carbonate, like every other sodium salt, is soluble in water. It dissolves in water to form an aqueous solution of sodium carbonate.

While in solution, sodium carbonate dissociates into its component ions according to the following equation:

$Na_2CO_3 (s) --- > 2Na^+ (aq) + CO_3^{2-} (aq)$

Carbon dioxide, on the other hand, does not dissociate in water. Instead, it dissolves in water where most of it remains as aqueous carbon dioxide in equilibrium with a small amount of hydronium ion and hydrogen carbonate ion.

Since the hydronium and hydrogen carbonate ions formed are so minute, the equation of the reaction can be written as: $CO_2 (g) --- > CO_2(aq)$

More on the dissolution of substances can be found here: brainly.com/question/28580758

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A 280 mL bubble contains 0.283 g of a gas at 0.951 atm and 25.0°C What is the molar mass of this gas?

tekilochka [14]

Answer: 28.3 g/mol

Explanation:

According to the ideal gas equation:'

$PV=nRT$

P= Pressure of the gas = 0.951 atm

V= Volume of the gas = 280 mL = 0.28 L (1L=1000 ml)

T= Temperature of the gas = 25°C=(25+273)K=298 K (0°C = 273 K)

R= Value of gas constant = 0.0821 Latm/K mol

$n=\frac{PV}{RT}=\frac{0.951\times 0.28L}{0.0821 \times 298}=0.010moles$

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

$0.010=\frac{0.283}{\text {Molar mass}}$

${\text {Molar mass}}=28.3g/mol$

Thus the molar mass of the gas is 28.3 g/mol.

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3 years ago

As a bond between a hydrogen atom and a sulfur atom is formed, electrons are

Stels [109]

In ionic bonds electrons are transferred from one species to another and the electrostatic attraction between oppositely charged ions gives rise to the ionic bond.
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the electronegativity difference between the atoms taking part in the bond will decide if its an ionic bond or covalent bond.
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the electronegativity difference between H and S is very small therefore they form a covalent bond by sharing their electrons
correct answer is
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3 years ago

Read 2 more answers

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1 year ago

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3 years ago

When mantle rocks near the radioactive core are heated, they become less dense than the cooler, upper mantle rocks. These warmer

Delicious77 [7]

C) convection cells (currents)

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