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3 years ago

What is the difference between naoh(s) and naoh(aq)?

Chemistry

2 answers:

Katena32 [7]3 years ago

8 0

NaOH (s) is in solid state and NaOH (aq) is an aqueous solution.

Lorico [155]3 years ago

6 0

Explanation:

In NaOH(s), the sodium hydroxide is present in solid state because (s) represents solid state of a substance.

This also means that there is strong force of attraction between sodium and hydroxide ions due to which they are bonded together.

In NaOH(aq), the sodium hydroxide is present in aqueous state because (aq) represents aqueous state.

This also means that in NaOH(aq) there are sodium and hydroxide ions are present in the solution.

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Calculate the concentration expressed in percent, if 10 g of NaOH is diluted to 500 ml with water.

Zepler [3.9K]

If 10 g of NaOH is diluted to 500 ml with water then the concentration expressed in percent is 0.5 mol/L .

Calculation ,

Given mass in gram = 10 g

Number of moles = given mass /molar mass = 10 g / 40 g/mol = 0.25mole

Given volume in ml = 500 ml

Given volume in liter = 0.5 L

Putting the value of mass and volume in equation i we get concentration expressed in percent .

C = number of moles ×100/ volume in liter = 0.25mole ×100/ 0.5 L

C = 0.5 mol/L

Concentration of solution in terms of percentage can be expressed in two ways

1) percentage by mass

2) percentage by volume

Hence, for liquid solutions, concentration is expressed in terms of percentage by volume.

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1 year ago

What does B represent?

Mashutka [201]

Answer: Botanical Acid

Explanation:

8 0

3 years ago

The ________ orbital is degenerate with 5py in a many-electron atom.

arsen [322]

The ________ orbital is degenerate with 5py in a many-electron atom.

<h2>5px is the correct answer</h2>

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3 years ago

How many moles of chromium III nitrate are produced When chromium reacts with 0.85 moles of lead for nitrate to produce chromium

Pepsi [2]

0.85 moles formula units of lead nitrate will produce 0.57 moles formula units of chromium (III) nitrate.

<h3>Explanation</h3>

Typically, the oxidation state of Pb in lead nitrate tend to be +2. In other words, Pb in lead nitrate tends to exist as $\text{Pb}^{2+}$ ions. The formula for a nitrate ion is ${\text{NO}_3}^{-}$ . The charge on each of the nitrate ion is -1. The charge on the two ions should balance. As a result, each $\text{Pb}^{2+}$ ion in lead nitrate would pair up with two ${\text{NO}_3}^{-}$ ions. The formula for lead nitrate will be $\text{Pb}({\text{NO}_3})_2$ . Each formula unit of lead nitrate will contain one $\text{Pb}^{2+}$ ion and two ${\text{NO}_3}^{-}$ ions.

The "III" in the name "chromium (III) nitrate" is a Roman Numeral. It indicates that the oxidation state of Cr in chromium (III) nitrate is +3. The Cr in that compound will exist as $\text{Cr}^{3+}$ . Similarly, each $\text{Cr}^{3+}$ will pair up with three ${\text{NO}_3}^{-}$ ions. The formula for chromium (III) nitrate will be $\text{Cr}(\text{NO}_3})_3$ . Each formula unit of chromium (III) nitrate will contain one ${\text{NO}_3}^{-}$ ion and three ${\text{NO}_3}^{-}$ ions.

0.85 moles formula units of lead nitrate will contain 0.85 × 2 = 1.7 moles of ${\text{NO}_3}^{-}$ ions. Those nitrate ions will end up in 1.7 / 3 = 0.57 moles formula units of chromium (III) nitrate. As a result, the reaction will produce 0.57 moles formula units of chromium (III) nitrate.

7 0

3 years ago

Which element is similar to the properties bromine?

Ainat [17]

Answer: Fluorine

Explanation: It belongs in the same group as Bromine

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3 years ago