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Minchanka [31]
3 years ago
9

The reactants of a reaction are 2AgClO3 and Na2CO3. According to the law of

Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
4 0

Answer:

The answer is "Option B"

Explanation:

Law:

In the law of the conservation of matter, states the volume of matter throughout the process remains constant. In any particular case, it is closed to the movement of matter.  It is mostly on conservation of energy means, that the total mass of the products should consider the sum of the mass, which is the reactant of the event of chemical processes.

Reaction:

2AgClO_3+ Na_2CO_3= Ag_2CO_3+Na_2ClO_3

In the above equation when we react to 2AgClO_3 from the Na_2CO_3, it will give Ag_2CO_3 \ \ \text{and} \ \ Na_2ClO_3. that's why option b is correct.

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Calculate the pH of a 0.10 M HCN solution that is 0.0070% ionized.
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Answer:

D) 5.15

Explanation:

Step 1: Write the equation for the dissociation of HCN

HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)

Step 2: Calculate [H⁺] at equilibrium

The percent of ionization (α%) is equal to the concentration of one ion at the equilibrium divided by the initial concentration of the acid times 100%.

α% = [H⁺]eq / [HCN]₀ × 100%

[H⁺]eq = α%/100% × [HCN]₀

[H⁺]eq = 0.0070%/100% × 0.10 M

[H⁺]eq = 7.0 × 10⁻⁶ M

Step 3: Calculate the pH

pH = -log [H⁺] = -log 7.0 × 10⁻⁶ = 5.15

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3 years ago
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3 0
2 years ago
What is the melting point of a substance?
Alona [7]

Answer:

The answer is C) The temperature at which the solid-state turns into liquid

Explanation:

The melting point of a substance is the temperature at which it shifts state from solid to liquid. At the melting point, the solid and liquid levels exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change. This occurs when the internal energy of the solid increases, commonly by the application of heat or pressure, which increases the substance's temperature to the melting point.

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Most lakes have rivers flowing out of them, carrying water to the ocean. However, some lakes, including Great Salt Lake and the
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2 years ago
Which correctly lists the types of matter, in terms of their atoms, in order from least tightly packed to most tightly packed?
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Answer:

D

Explanation:

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