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3 years ago

1: Write the positive and negative ions that result when the following compounds are dissolved in an aqueous solution:

Chemistry

1 answer:

belka [17]3 years ago

7 0

Answer:

See explanation.

Explanation:

Hello there!

In this case, for the required chemical reactions, we proceed as follows, by considering that the left-handed elements stand for the cations and the right-handed ones for the anions:

1. $Na_2CO_3(aq)\rightarrow 2Na^+(aq)+(CO_3)^{2-}(aq)$

2. $FeBr_3(aq)\rightarrow Fe^{3+}(aq)+3Br^-(aq)$

3. $Al_2(SO_4)_3(aq)\rightarrow 2Al^{3+}(aq)+3(SO_4)^{2-}(aq)$

2: In this case, we can represent the formula equation first according to the neutralization reaction:

$3NaOH(aq)+H_3PO_4(aq)\rightarrow Na_3PO_4(aq)+3H_2O(l)$

Which is worded as: three molecules of aqueous sodium hydroxide reacts with one molecule of aqueous phosphoric acid to yield one molecule of aqueous sodium chloride and three molecules of liquid water.

Regards!

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Ammonia gas has a molar mass of approximately 17 grams per mole. At 290K and 1.2 atm, a sample of ammonia has a volume of 3.7 L.

jeka94

Ammonia gas will have a mass of 3.17grams.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass.

However, to calculate the number of moles present in the ammonia gas given in this question, we use the formula as follows:

PV = nRT

where;

P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant
T = temperature

n = PV ÷ RT

n = (1.2 × 3.7) ÷ (0.0821 × 290)

n = 4.44 ÷ 23.81

n = 0.186mol

Mass = 0.186 × 17

Mass of ammonia gas = 3.17g

Therefore, the mass of ammonia gas is 3.17grams.

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6 0

3 years ago

Oh no! Igor stepped on a piece of glass on the sidewalk in front of

Helen [10]

Answer: The correct sequence for the series of event would be.

1. Igor's toe is being cut by the glass.

2. The wound surrounding the injury becomes infected with bacteria from Igor's foot.

3. Antibodies and circulating white blood cells stick to the bacteria creating a large complex in the lymph vessel.

4. The bacteria enter his lymph system and travel towards a lymph node.

5. The complex becomes trapped in a lymph node and is engulfed by a phagocyte.

6. The bacteria is destroyed.

Explanation:

Whenever there is any cut or wound in the body and body encounters invasion of the foreign materials it considers it as harmful pathogen.

These pathogens when enters the body it is considered as antigen, it then travels to the lymphatic system.

These bacterial complex is then killed by the phagocytes and digested by the body.

In this way the complex is killed and the bacteria is destroyed.

8 0

4 years ago

La manifestación de un huracán, el movimiento de los aerogeneradores cuando el viento alcanza una velocidad de 3 a 4 metros por

Arturiano [62]

Answer:

Ambos son ejemplos de procesos de transformación de la energía.

El ejemplo del aerogenerador transforma la energía cinética traslacional del viento en energía cinética rotacional del aerogenerador y pérdidas debido a la fricción, la cual es en forma de calor.

En cambio, el ejemplo del hervido del agua es el ingreso de calor por la combustión de madera para aumentar su energía interna.

Explanation:

Son ejemplos de procesos de transformación de energía, por el Principio de Conservación de la Energía se sabe que la energía total de un sistema no se crea ni se destruye, solo se conserva.

En cambio, el ejemplo del hervido del agua es el ingreso de calor por la combustión de madera para aumentar su energía interna.

8 0

3 years ago

What must happen to make for an ion to from

Mazyrski [523]

Answer:

when atoms lose or gain electrons ions form

Explanation:

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3 0

3 years ago

Read 2 more answers

A certain reaction at equilibrium has more moles of gaseous products than of gaseous reactants.(b) Write a statement about the r

mojhsa [17]

To be equal as $K_p$ , $K_c$ needs to be divided by $(RT)^{\Delta n}$

<h3>Briefly explained</h3>

When the amount of gaseous reactant is greater than the amount of gaseous product, where $n_{products} < n_{reactants}$ ,

then = $K_p < K_c$

It's because $\Delta n$ is negative, which places (RT) in the denominator. This is how the equation will now appear.

$K_p = K_c(RT)^{-\Delta n} = \frac{ K_c}{(RT)^{\Delta n}}$

Here you can observe the value of $K_c$ is greater than $K_p$ . To be equal as $K_p$ , $K_c$ needs to be divided by $(RT)^{\Delta n}$

<h3>What is Δngas?</h3>

The number of moles of gas that move from the reactant side to the product side is denoted by the symbol ∆n or delta n in this equation.

Once more, n represents the growth in the number of gaseous molecules the equilibrium equation can represent. When there are exactly the same number of gaseous molecules in the system, n = 0, Kp = Kc, and both equilibrium constants are dimensionless.

<h3>Definition of equilibrium</h3>

When a chemical reaction does not completely transform all reactants into products, equilibrium occurs. Many chemical processes eventually reach a state of balance or dynamic equilibrium where both reactants and products are present.

Learn more about equilibrium

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6 0

2 years ago