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3 years ago

What formula can represent hydrogen ions in an aqueous solution?

Chemistry

1 answer:

Montano1993 [528]3 years ago

5 0

Answer : The formula that represent hydrogen ions in an aqueous solution is, $H^+$

Explanation :

As we know that the formula of water is, $H_2O$ .

In an aqueous solution, it dissociates to give hydrogen ion and hydroxide ion.

The dissociation reaction is:

$H_2O(aq)\rightarrow H^+(aq)+OH^-(aq)$

The formula of hydrogen ion is, $H^+$

The formula of hydroxide ion is, $OH^-$

Hence, the formula that represent hydrogen ions in an aqueous solution is, $H^+$

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A pan containing 20.0 grams of water was allowed to cool from a temperature of 95.0 °C. If the amount of heat released is 1,200

Sedbober [7]

Answer:

81°C.

Explanation:

To solve this problem, we can use the relation:

where, Q is the amount of heat released from water (Q = - 1200 J).

m is the mass of the water (m = 20.0 g).

c is the specific heat capacity of water (c of water = 4.186 J/g.°C).

ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = final T - 95.0°C).

∵ Q = m.c.ΔT

∴ (- 1200 J) = (20.0 g)(4.186 J/g.°C)(final T - 95.0°C ).

(- 1200 J) = 83.72 final T - 7953.

∴ final T = (- 1200 J + 7953)/83.72 = 80.67°C ≅ 81.0°C.

<em>So, the right choice is: 81°C.</em>

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4 years ago

This is hard for me <br> Anyone explain foe me <br> Help !!!

Bumek [7]

There is more carbon in the atmosphere

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3 years ago

A secondary step in the process to produce ultra-pure silicon is to combine silicon tetrachloride with magnesium. How many grams

mariarad [96]

The mass of silicon, Si produced from the reaction is 329.41 g

<h3>Balanced equation </h3>

SiCl₄ + 2Mg —> 2MgCl₂ + Si

Molar mass of SiCl₄ = 28 + (35.5×4) = 170 g/mol

Mass of SiCl₄ from the balanced equation = 1 × 170 = 170 g

Molar mass of Si = 28 g/mol

Mass of Si from the balanced equation = 1 × 28 = 28 g

From the balanced equation above,

170 g of SiCl₄ reacted to produce 28 g of Si.

<h3>How to determine the mass of Si produced </h3>

From the balanced equation above,

170 g of SiCl₄ reacted to produce 28 g of Si.

Therefore,

2 Kg (i.e 2000 g) of SiCl₄ will react to produce = (2000 × 28) / 170 = 329.41 g of Si

Thus, 329.41 g of Si were obtained from the reaction

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Answer:

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Explanation:

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The answer to your question is 9.60.

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