In the following reaction, how many grams of NaBr will react with 311 grams of Pb(NO3)2?pb(no3)2(aq)+2NaBr(g) -> PbBr2(s) + 2NaNO3(aq)
The molar mass of NaBr is 102.9 grams and that of Pb(NO3)2 is 331.21 grams.

Answers

Answer 1

Answer:

Answer: 193.4 grams

Explanation: According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023* 10^(23)$ of particles.

$Pb(NO_3)_2(aq)+2NaBr(g)\rightarrow PbBr_2(s)+2NaNO_3(aq)$

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

${\text{Number of moles} of Pb(NO_3)_2}=(311g)/(331.21gmol)=0.94moles$

According to stoichiometry

1 mole of $Pb(NO_3)_2$ reacts with 2 moles of $NaBr$

0.94 moles of $Pb(NO_3)_2$ will react with= $(2)/(1)* 0.94=1.88moles$ of $NaBr$

Mass of $NaBr=moles* {\text {molar mass}}=1.88* 102.9=193.4g$

Answer 2

Answer:

193.24g

Explanation:

Step 1:

The balanced equation for the reaction. This is illustrated below:

Pb(NO3)2(aq) + 2NaBr(g) -> PbBr2(s) + 2NaNO3(aq)

Step 2:

Determination of the masses of Pb(NO3)2 and NaBr that reacted from the balanced equation. This is illustrated below:

Molar Mass of Pb(NO3)2 = 331.21g/mol

Molar Mass of NaBr = 102.9g/mol

Mass of NaBr from the balanced equation = 2 x 102.9 = 205.8g.

From the balanced equation,

Mass of Pb(NO3)2 that reacted = 331.21g

Mass of NaBr that reacted = 205.8g

Step 3:

Determination of the mass of NaBr that reacted with 311g of Pb(NO3)2. This is illustrated below:

From the balanced equation above,

331.21g of Pb(NO3)2 reacted with 205.8g of NaBr.

Therefore, 311g of Pb(NO3)2 will react with = (311x205.8)/331.21 = 193.24g of NaBr.

From the calculations made above, 193.24g of NaBr will react with 311g of Pb(NO3)2

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Answers

The answer is 1.6 atm. Let's first calculate the mole fraction of gas Y. The mole fraction (x) is: x = n1/n, where n1 is a number of moles of an individual gas in a mixture and n is total moles of the gas mixture. We know that n1 of gas Y is 6.0 mol (n1 = 6.0 mol) and that there are in total 8. mol of the gas mixture (n = 2.0 + 6.0 = 8.0 mol). Now calculate the mole fraction of gas Y. x = 6.0/8.0 = 0.75. Now, let's use the mole fraction of gas Y (x) and the total pressure (P) to calculate the partial pressure of gas Y (P1): x = P1/P. P1 = x * P. If x = 0.75 and P = 2.1 atm, then the partial pressure of gas Y is: P1 = 0.75 * 2.1 atm = 1.6 atm.

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What are the effects of baking powder solution on dilute hydrochloric acid solution

Answers

Combining an acid with a base typically results in water and salt. In some cases, these reactions release gas and heat as well. Mixing baking soda, or NaHCO3, with hydrochloric acid, or HCl, results in table salt, NaCl, as well as water, H2O, and carbon dioxide, CO2.
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Hypervitaminosis is a serious health threat associated with excessive amounts of ingested fat-soluble vitamins. why do water-soluble vitamins not commonly pose the same threat?

Answers

Answer:

Hypervitaminosis is a serious health issue which is associated with the accumulation of the vitamins in the body. This problem is mainly associated with the fat soluble vitamins.

This is because the fat soluble vitamins gets accumulated in the fatty cells of the body. Whereas, in case of water soluble vitamins it gets dissolved in water and gets eliminated from the body.

So, there is very rare chance that the water soluble vitamin not cause hypervitaminosis.

Final answer:

Hypervitaminosis does not typically occur with water-soluble vitamins because excess amounts are excreted in urine rather than stored in the body, preventing a harmful build-up that could lead to toxicity.

Explanation:

Hypervitaminosis is indeed a health threat associated with excessive intake of fat-soluble vitamins, but water-soluble vitamins do not typically pose this risk because of how our bodies process them. Fat-soluble vitamins, which include vitamins A, D, E, and K, can be stored in our bodies, specifically in our liver and fat tissues. Therefore, consuming them in excessive amounts can lead to accumulation, resulting in toxic effects known as hypervitaminosis.

On the other hand, water-soluble vitamins, which include vitamins B and C, cannot be stored in the body for a long duration. Any excess intake of these vitamins is typically excreted in urine, preventing a harmful build-up in the body, thus reducing the risk of hypervitaminosis.

Learn more about Vitamin intake here:

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Answers

Answer:

Rule, oversee, discipline

Explanation:

hope it helped!

Thesaurus.com is great for answers like this but a few common ones are power, command, authority, jurisdiction, and sway

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Answers

Light is both a wave and a particle. Good luck!

On the pH scale, a 7 indicates _____.
a base
an acid
neutrality

Answers

The correct answer is:

neutrality

on the pH scale 7 is neutral above 7 is basic and below 7 is acidic.

Explanation:

The pH is an example of how acidic/basic water is. The scale goes from 0 - 14, with 7 being neutral, pH of less than 7 designates acidity, whereas a pH of greater than 7 intimates a base. pH is really a pattern of the relative amount of free hydrogen and hydroxyl ions in the water.pH is a measure of how acidic/basic water is.

It is neutral because, at this pH, the molar concentrations of Hydroxide and Hydronium are same, therefore the substance is not a base nor an acid.

Final answer:

On the pH scale, a 7 represents neutrality. It is not considered acidic nor basic, but instead, it represents a balanced solution, such as pure water.

Explanation:

On the pH scale, a 7 indicates neutrality. This means that the solution is neither acidic nor basic. The pH scale ranges from 0 to 14, with 7 being the midpoint. Solutions with a pH less than 7 are considered acidic, while those with a pH greater than 7 are considered base or alkaline. So, a pH of 7 is indicative of a perfectly balanced solution, like pure water.