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3 years ago

An ion with 11 protons 12 neutrons and a charge of + 1 has an atomic number of

Chemistry

1 answer:

posledela3 years ago

5 0

Answer:

11 electrons total and 23amu

Explanation:

This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu.

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9. If the limits of cow hearing are 23 Hz to 35,000 Hz, what are the sound wavelengths that are

hammer [34]

Answer:

wave length=speed/frequency

=365/23

wave length=speed/frequency

=365/35000

3 0

3 years ago

suppose that two hydroxides, moh and m′ (oh)2, both have a ksp of 1.39 × 10−12 and that initially both cations are present in a

11Alexandr11 [23.1K]

When base is added in order to increase the pH of a solution, it results in MOH salt <u>precipitating first.</u>

Equation :

MOH (s) ⇄ M⁺ (aq) ₊ OH⁻(aq)

K $sp$ = [M⁺] [OH⁻]

K $sp$ = 1.39×10⁻¹² and [M⁺] = 0.001M

∴ 1.39×10⁻¹² = (0.001M) [OH⁻]

[OH⁻] = 1.004×10⁻¹⁹M

pOH = -log [OH⁻] = 11.9

pH = 14 - pOH

= 14 - 11.9

To learn more about solubility equilibrium ;

https://brainly.in/question/9213521

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8 0

2 years ago

Which is better acid or ice

klemol [59]

Not sure what you mean could you be a little more detailed

4 0

3 years ago

Apply the Law of Conservation of Mass to the following problem: During a combustion reaction, 12.2 grams of methane reacts with

Ratling [72]

Answer:

5.8 g of carbon dioxide are produced

Explanation:

The Law of Conservation of Mass states that the mass of the reactants must equal the mass of the products in all chemical reactions.

This is the chemical reaction (combustion)

CH₄ + 2O₂ → CO₂ + 2H₂O

12.2 g 14 g x 20g

Mass in reactants = 12.2 g + 14 g = 26.2 g

Mass in products = x + 20 g

26.2 g = x + 20g

26.2 g - 20g = x

5.8 g = x

5 0

3 years ago

Write the two balanced equations, one for the incomplete combustion of methane (to form carbon monoxide and water vapor), and an

kompoz [17]

Answer:

$2CH_{4(g)} +3O_{2(g)} -->2CO(g)+4H_{2}O_{(g)}\\CH_{4(g)} +2O_{2(g)} -->CO_{2(g)} +2H_{2}O_{(g)} \\$

Explanation:

$2CH_{4(g)} +3O_{2(g)} -->2CO(g)+4H_{2}O_{(g)}\\CH_{4(g)} +2O_{2(g)} -->CO_{2(g)} +2H_{2}O_{(g)} \\$

The incomplete combustion of alkanes, and other fuels actually, happens when there is a limited supply of oxygen. Instead of the fuel burning completely to produce carbon dioxide, it produces carbon monoxide instead.

This gas is harmful to jumans because it combines with haemoglobin in lood and takes up space that belongs to oxygen which can lead to suffocation or even death

6 0

3 years ago