All categories

3 years ago

Calculate the mass of 4.55x1024 molecules of sucrose

Chemistry

1 answer:

maxonik [38]3 years ago

7 0

Answer:

2584 g

Explanation:

The molecular formula for sucrose is C₁₂H₂₂O₁₁, which means its molar mass is 342.3 g/mol.

First we convert molecules into moles by using Avogadro's number:

4.55x10²⁴ molecules ÷ 6.023x10²³ mol/molecules = 7.55 mol

Now we convert moles of sucrose into grams, using its molar mass:

7.55 mol * 342.3 g/mol = 2584 g

You might be interested in

A mixture of calcium carbonate, CaCO3, and barium carbonate, BaCO3, weighing 5.40 g reacts fully with hydrochloric acid, HCl(aq)

amid [387]

Answer:

CaCO₃ = 85.18%

BaCO₃ = 14.82%

Explanation:

The acid will react with the salts, the partial reactions are:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

BaCO₃ + 2HCl → BaCl₂ + CO₂ + H₂O

So, the total amount of CaCO₃ BaCO₃ will form the CO₂.

Using the ideal gas law to calculate the number of moles of CO₂:

PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (0.082 atm*L/mol*K), and T is the temperature (50ºC + 273 = 323 K).

0.904*1.39 = n*0.082*323

26.486n = 1.25656

n = 0.05 mol

So, the number of moles of the mixture is 0.05 mol.

The molar masses of the components are:

CaCO₃ = 40 g/mol of Ca + 12 g/mol of C + 3*16 g/mol of O = 100 g/mol

BaCO₃ = 137.3 g/mol of Ba + 12 g/mol of C + 3*16 g/mol of O = 197.3 g/mol

Let's call x the number of moles of CaCO₃ and y the number of moles of BaCO₃, so:

100x + 197.3y = 5.4

x + y = 0.05 mol

y = 0.05 - x

100x + 197.3*(0.05 - x) = 5.4

100x - 197.3x = 5.4 - 9.865

97.3x = 4.465

x = 0.046 mol of CaCO₃

y = 0.004 mol of BaCO₃

So, the masses are:

CaCO₃ = 100* 0.046 = 4.60 g

BaCO₃ = 137.3*0.004 = 0.80 g

The percentages in the mixture are:

CaCO₃ = (4.60/5.40)*100% = 85.18%

BaCO₃ = (0.80/5.40)*100% = 14.82%

4 0

3 years ago

How many atoms in 10 moles of aluminum

garik1379 [7]

I would say 6.022⋅1023 atom

7 0

3 years ago

Read 2 more answers

Which of the following statements about the kinetic molecular theory are not correct?

Rashid [163]

Answer:

The false statement is: (C) The average kinetic energy of the molecules is not related to the absolute temperature

Explanation:

According to the Kinetic Theory of Gases, gases are composed of small fast moving particles that are in constant random motion. These gaseous particles are known as molecules.

It is assumed that the mass of all the gaseous molecules is the same and the intermolecular interactions (attractive or repulsive) are negligible.

Also, the total volume of all the gaseous molecules is considered to be negligible as compared to the volume of the container.

According to this theory, average kinetic energy (K) of the gaseous particles is directly proportional to the absolute temperature (T) of the gas, by the equation:

$K = \frac{3}{2}k_{b}T$

Here, $k_{b}$ is the Boltzmann constant

Therefore, the false statement about the kinetic molecular theory is (C)

3 0

3 years ago

Solutions with a higher concentration of solutes than the concentration inside the cell are: Solutions with a higher concentrati

Nadusha1986 [10]

Answer:

Explanation:

A hypertonic solution is one in which the concentration of the solute is greater than that of those inside the cell. This means that there is a solution with a higher concentration of solute compared to what is obtainable inside the cell environment.

Hence, we say that the solutions are hypertonic since they contain essentially solutes that are more concentrated than those inside the cell

7 0

3 years ago

Can someone please help me solve this? i dont understand this problem :(

Bumek [7]

Answer:

–4020 KJ

Explanation:

The following data were obtained from the question:

H₂(g) + F₂(g) —> 2HF(g) ΔH = –536 KJ

Next, we shall determine the mass of H₂ that reacted from the balanced equation to produce –536 KJ of heat energy. This can be obtained as follow:

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mass of H₂ from the balanced equation = 1 × 2 = 2 g.

Summary:

From the balanced equation above,

2 g of H₂ reacted to produce –536 KJ of heat energy.

Finally, we shall determine the heat change produced by the reaction of 15 g of H₂. This can be obtained as follow:

From the balanced equation above,

2 g of H₂ reacted to produce –536 KJ of heat energy.

Therefore, 15 g of H₂ will react to produce = (15 × –536)/2 = –4020 KJ of heat energy.

Thus, the heat change for the reaction is –4020 KJ

4 0

3 years ago