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Gnom [1K]
3 years ago
9

To DECREASE the % ionization of HNO2, which salt would you add to the solution A) NaCl B) KNO3 C) KNO3 D) NH4Cl E) NaOH

Chemistry
1 answer:
Rama09 [41]3 years ago
3 0

Explanation:

HNO₂ ionizes in the following way -

HNO₂ + H₂O ----> H₃O⁺ + NO₂⁻

Hence , if we add ions of NO₂⁻ , it will increase the concentration of these ions towards the right side , and the reaction will proceeds in the backward direction , because of the Le - Chateliers principle ,

Hence from the options given in the question ,  none will be able to bring the reaction , back , i.e. reduce the ionization .

But in case we use KNO₂ , then , it is capable to reduce the ionization of HNO₂ .

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What quantity of copper is deposited by the same quantity of electricity that deposited 9g of aluminum
klio [65]

Answer:

Mass of copper deposited = 31.75 g

Explanation:

According to Faraday's second law of electrolysis, when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements deposited are inversely proportional to the charges on the ions of the elements.

From this law, it can be seen that the higher the charge, the lower the number of moles of a given element deposited.

Number of moles of aluminium in 9 g of aluminium = mass / molar mass

Molar mass of aluminium = 27 g

Number of moles of aluminium = 9/27 = 1/3 moles

Charge on aluminium ion = +3

3 moles of electrons will discharge 1 mole of aluminium,

1 mole of electrons will discharge 1/3 moles of aluminium

Number of moles of electrons involved = 1 mole of electrons

Charge on copper ion = +2

1 mole of electrons will discharge 1/2 moles of copper.

Mass of 1/2 moles of copper = number of moles × molar mass of copper

Molar mass of copper = 63.5 g

Mass of copper deposited = 1/2 × 63.5 = 31.75 g

3 0
3 years ago
What is bank?Effect of drug abuse.<br>​
jeyben [28]

- Long term effects

Chronic drug use can alter a person’s brain structure and function, resulting in long-term psychological effects, such as: depression, anxiety, panic disorders, increased aggression, paranoia, hallucinations.

- Cardiovascular disease

Stimulants, such as cocaine and methamphetamines, can damage the heart and blood vessels. The long-term use of these drugs can lead to coronary artery disease, arrhythmia, and heart attack.

- Respiratory problems

Drugs that people smoke or inhale can damage the respiratory system and lead to chronic respiratory infections and diseases. Opioids slow a person’s breathing by binding to specific receptors in the central nervous system that regulate respiration. By depressing a person’s respiration, these drugs can lead to slow breathing or heavy snoring.

- Kidney damage

The kidneys filter excess minerals and waste products from the blood. Heroin, ketamine, and synthetic cannabinoids can cause kidney damage or kidney failure.

- Liver disease

Chronic drug and alcohol use can damage the liver cells, leading to inflammation, scarring, and even liver failure.

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Taking too much of a drug or taking multiple drugs together can result in an overdose. According to the Centers for Disease Control and Prevention (CDC), drug overdose caused 67,367 deathsTrusted Source in the United States in 2018. Opioids contributed to nearly 70% of these deaths.

How to get help:

Finding the right treatment program can be a daunting task. Here are a few things to think about when seeking treatment for drug abuse, misuse, or addiction:

consider whether inpatient or outpatient services would be the best fit

find local treatment centers using this resource from the Substance Abuse and Mental Health Services Administration

note that state-run treatment centers and programs can be free of charge

look for programs that use evidence-based treatment strategies

7 0
3 years ago
Molar mass of calcium sulfate
Nonamiya [84]

Answer:

The molar mass of calcium sulfate is 136.14 g/mole. Calcium has a molar mass of 40.08 g/mole. Sulfur has a molar mass of 32.06 g/mole.

7 0
3 years ago
____________ rays show areas where large quantities of energy are released.
sladkih [1.3K]

Answer:

Gamma

Explanation:

3 0
2 years ago
Which sentence best describes the shapes of the moon over the course of about a month? (2 points)
zvonat [6]

The sentence best describes the shapes of the moon over the course of about a month is over the course of about a month, the shape of the moon changes from a full circle, to a crescent, and back to a full circle.

<h3>What is full moon?</h3>

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The full moon, crescent, half moon or no moon are all the stages of a Moon's lifecycle.

Over a period of 14 days, moon changes from a full moon to no moon. In the another 14 days, no moon changes to full moon. This cycle keeps on going for years and years.

Thus, the sentence best describes the shapes of the moon over the course of about a month is over the course of about a month, the shape of the moon changes from a full circle, to a crescent, and back to a full circle.

Learn more about full moon.

brainly.com/question/22879736

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7 0
2 years ago
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