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spin [16.1K]
2 years ago
8

What is the molality of a solution containing 15 g NaCl dissolved in 50 g of water

Chemistry
2 answers:
enot [183]2 years ago
7 0

Answer:

cdjkekendnekekekeknenwkwkwkwnrnrnrjejjwjwksnsjnrheifjfuufjeenenej

faltersainse [42]2 years ago
4 0
Hopes this helps:

Answer: 5.132 mol/kg

How I got the answer I looked it up. Please mark as brainlist if it’s right.
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Which sequence represents the correct ranking of the amount of nitrogen per molecule, from least to most nitrogen? Urea, uric ac
Reptile [31]

Answer:

Ammonia, urea, uric acid

Explanation:

The given compounds are:-

Urea which has a molecular formula of CH_4N_2O and has 2 atoms of nitrogen per molecule.

Ammonia which has a molecular formula of NH_3 and has 1 atom of nitrogen per molecule.

Uric acid which has a molecular formula of C_5H_4N_4O_3 and has 4 atoms of nitrogen per molecule.

Thus,

The order from least to most nitrogen is:-

Ammonia, urea, uric acid

5 0
2 years ago
Plz help me with this:
In-s [12.5K]

Answer:

1) H 1s^1

2) [Ar] 3d⁸ 4s²

3) [He] 2s2 2p3

4) [Kr] 4d10 5s2 5p5

5) [Ar] 4s² and [Ar] 4s²

6) [He] 2s2 2p2

7)  [He] 2s² 2p⁴

8) [Ar] 3d7 4s2

9) [Kr] 4d¹⁰ 5s¹  

10) [Ne] 3s² 3p⁶

Explanation:

7 0
3 years ago
Tap water at room temperature has a pH of 7.2 and carbonate alkalinity of 200 mg/L (= 40 mmol/L). What is the concentration of b
UNO [17]

Answer:

the concentration of bicarbonate is <em>[HCO₃⁻] = 0,03996 M </em>and carbonate is <em>[CO₃²⁻] = 3,56x10⁻⁵ M.</em>

Explanation:

Carbonate-bicarbonate is:

HCO₃⁻ ⇄ CO₃²⁻ + H⁺ With pka = 10,25

Using Henderson-Hasselbalach formula:

pH = pka + log₁₀\frac{[CO_{3}^{2-}]}{[HCO_{3}^-]}

7,2 = 10,25 + log₁₀\frac{[CO_{3}^{2-}]}{[HCO_{3}^-]}

8,91x10⁻⁴ = \frac{[CO_{3}^{2-}]}{[HCO_{3}^-]} <em>(1)</em>

Also:

0,040 M = [CO₃²⁻] + [HCO₃⁻] <em>(2)</em>

Replacing (2) in 1:

<em>[HCO₃⁻] = 0,03996 M</em>

Thus:

<em>[CO₃²⁻] = 3,56x10⁻⁵ M</em>

I hope it helps.

4 0
3 years ago
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d8
MAXImum [283]

Answer:

Pd (palladium).

Explanation:

46 electrons total, this is representative of the Pd (palladium) element.

5 0
3 years ago
For The Reaction CH3COOH ---&gt; CH3COO- + H+, which of the following statements is true? A.) Ch3COOH is a Bronsted Lowry base.
Savatey [412]

Answer: Option (C) is the correct answer.

Explanation:

According to Arrhenius, bases are the species which when dissolved in water will give hydroxide ions, that is, OH^{-}.

For example, NaOH + H_{2}O \rightarrow Na^{+} + OH^{-}

Arrhenius acids are the species which when dissolved in water will give hydrogen ions, that is, H^{+}.

For example, CH_{3}COOH + H_{2}O \rightleftharpoons H_{3}O^{+} + CH_{3}COO^{-}

In water, when an acid loses a hydrogen ion then the specie formed is known as conjugate base.

Here, CH_{3}COO^{-} is the conjugate base of CH_{3}COOH.

Similarly, species which accept the hydrogen ion result in the formation of conjugate acid.

Hence, H_{3}O^{+} is the conjugate acid of H_{2}O.

Thus, we can conclude that CH_{3}COO^{-} is the conjugate base.

7 0
3 years ago
Read 2 more answers
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