Which properties of plastics are useful in transporting food and drink?​

Answer:

yessirrrrrrrrrrrrrr

Explanation:lets get ma boa

Answer:

4.64g MgO(s)

Explanation:

Given 2Mg(s) + O₂(g) => 2MgO(s)

           2.8g     excess        (?)

  => 2.8g/24.31 g/mol

       = 0.115 mol. Mg(s)  => 0.115 mol. MgO(s)

grams MgO(s) produced  = 40.31g/mol. x 0.115 mol. = 4.64g (Theoritical Yield)

The question is incomplete, the complete question is shown in the image attached.

Answer:

7.69%

Explanation:

The balanced equation of this reaction is shown in the image attached to this answer.

The reaction is redox because we can notice a change in the oxidation number of species from left to right in the reaction equation.

For instance, the oxidation number of oxygen was changed from -1 in H2O2 to zero in O2. Hence H2O2 was oxidized.

To calculate the percentage of H2O2 in the sample;

number of moles of KMnO4 =  137 ml/1000 * 0.230 M = 0.03151 moles of KMnO4

From the reaction equation;

2 moles of permanganate reacts with 5 moles of H2O2

0.03151 moles of permanganate reacts with  0.03151 moles * 5/2 = 0.079 moles of H202

Mass of H2O2 reacted = 0.079 moles of H202 * 34 gmol-1 = 2.69 g

Hence % by mass of H2O2 in the sample = 2.69 g/35 g * 100 = 7.69%

Answer:

Landslides

Explanation:

Answer:

Landslides

Explanation:

Correct on edge

Answer:

kinetic energy

Explanation:

Answer:

kenetic energy is the one

Answer:

0.692

Explanation:

To solve this problem we can use Henderson-Hasselbach's (H-H) equation:

In which pOH can be calculated from the pH:

Then we use the H-H equation to calculate[tex]\frac{[NH_4Cl]}{[NH_3]}[/tex]:

As the problem asks for the ratio of ammonia to ammonium chloride, we invert [tex]\frac{[NH_4Cl]}{[NH_3]}[/tex]:

The mole ratio of ammonia to ammonium chloride in a buffer with a pH of 9.09 is 0.692.

Henderson Hasselbalch equation for the weak base (NH₃) and for their conjugate acid (NH₄Cl) will be written as:

pOH = pKb + log[NH₄Cl]/[NH₃], where

pKb = base dissociation constant = 4.75

pOH will be calculated from the given value of pH as:

pH + pOH = 14

pOH = 14 - 9.09 = 4.91

Now we these values in the above equation and we get,

4.91 = 4.75 + log[NH₄Cl]/[NH₃]

log[NH₄Cl]/[NH₃] = 0.16

[NH₄Cl]/[NH₃] = 10⁰°¹⁶

[NH₄Cl]/[NH₃] = 1.44

[NH₃]/[NH₄Cl] = 1/1.44

[NH₃]/[NH₄Cl] = 0.692

Hence, required mole ratio is 0.692.

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Answer:

a) Q₁ = 58.82 KJ

b) Q₂ = 42.48 KJ

c) Q₃ = 29.22 KJ

d) Q = 130.52 KJ  

Explanation:

a)

In order to find the energy absorbed to heat the solid, we will use:

[tex]Q_{1} = mC_{1}\Delta T_{1}[/tex]

where,

Q₁ = Heat absorbed for heating solid = ?

m = mass of solid = 488.3 g = 0.4883 kg

C₁ = Specific Heat Capacity of Solid = 2.96 J/g °C

ΔT₁ =  Change in temperature of Solid = Melting Temperature - Initial Temp.

ΔT₁ = 17.6°C - (-23.1°C) = 40.7°C

Therefore,

[tex]Q_{1} = (488.3\ g)(2.96\ J/g\ ^{0}C)(40.7\ ^{0}C)[/tex]

Q₁ = 58.82 KJ

b)

In order to find the absorbed to melt the solid at 17.6°C, we will use:

[tex]Q_{2} = nH_{fus}[/tex]

where,

Q₂ = Heat absorbed for melting solid = ?

H_fus = Heat of Fusion = 8.04 KJ/mol

n = no. of moles = [tex]\frac{m}{MM} = \frac{488.3\ g}{92.41\ g/mol} = 5.28 mol[/tex]

Therefore,

[tex]Q_{2} = (5.28\ mol)(8.04\ KJ/mol)[/tex]

Q₂ = 42.48 KJ

c)

In order to find the energy absorbed to heat the liquid, we will use:

[tex]Q_{3} = m C_{3}\Delta T_{3}[/tex]

where,

Q₃ = Heat absorbed for heating Liquid = ?

m = mass of solid = 488.3 g = 0.4883 kg

C₃ = Specific Heat Capacity of Liquid = 1.75 J/g °C

ΔT₃ =  Change in temperature of Liquid = Final Temp. - Melting Temp.

ΔT₃ = 51.8°C - 17.6°C = 34.2°C

Therefore,

[tex]Q_{3} = (488.3\ g)(1.75\ J/g\ ^{0}C)(34.2\ ^{0}C)[/tex]

Q₃ = 29.22 KJ

d)

Total amount of energy absorbed during entire process is:

[tex]Q = Q_{1} + Q_{2} + Q_{3}[/tex]

[tex]Q = 58.82\ KJ + 42.48\ KJ + 29.22\ KJ[/tex]

Q = 130.52 KJ

In order to heat a 488.3 g solid, 58.8 kJ are required. To melt the solid, 42.5 kJ are required. To heat the liquid, 29.2 kJ are required. The total amount of energy absorbed is 130.5 kJ.

Initially, a 488.3 g solid at -23.1 °C is heated up to 17.6 °C (melting point). We can calculate the heat required (Q₁) using the following expression.

[tex]Q_1 = c \times m \times \Delta T = \frac{2.96J}{g.\° C } \times 488.3g \times (17.6\° C-(-23.1\° C)) \times \frac{1kJ}{1000J} = 58.8 kJ[/tex]

where,

At 17.6 °C, we can calculate the heat (Q₂) required to melt the solid using the following expression.

[tex]Q_2 = \Delta H_{fus} \times \frac{m}{MM} = 8.04 kJ/mol \times \frac{488.3 g}{92.41g/mol} = 42.5kJ[/tex]

where,

The liquid is heated from 17.6 °C to 51.8 °C. We can calculate the heat required (Q₃) using the following expression.

[tex]Q_3 = c \times m \times \Delta T = \frac{1.75J}{g.\° C } \times 488.3g \times (51.8\° C-17.6\° C)) \times \frac{1kJ}{1000J} = 29.2 kJ[/tex]

The total amount of energy absorbed (Q) is the sum of the energy absorbed in each step.

[tex]Q = Q_1 + Q_2 + Q_3 = 58.8kJ+42.5kJ+29.2kJ= 130.5kJ[/tex]

In order to heat a 488.3 g solid, 58.8 kJ are required. To melt the solid, 42.5 kJ are required. To heat the liquid, 29.2 kJ are required. The total amount of energy absorbed is 130.5 kJ.

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Answer:

Pollen

Explanation:

bc i take notes and also my sister studies bio

PLZ GIMME BRAINLIEST

Answer:

correct

Explanation:

Answer:

You can fill 212 balloons.

Explanation:

First we calculate the helium moles in the small cylinder, using PV=nRT:

141.13 atm * 2.20 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 298.16 K

Then we calculate the number of moles that can fit in a single balloon:

Finally we divide the total number of available moles by the number of moles in a single balloon:

So the answer is that you can fill 212 balloons.

Answer:

Recessive and Dominant

Explanation:

Answer:

4 doughnut

Explanation:

Explanation:

Bohr's model of the hydrogen atom is based on three postulates: (1) an electron moves around the nucleus in a circular orbit, (2) an electron's angular momentum in the orbit is quantized, and (3) the change in an electron's energy 

Answer:

chemistry, deposition occurs when molecules settle out of a solution. Deposition can be viewed as a reverse process to dissolution or particle re-entrainment. It is a phase change from the gaseous state to a solid, without passing through the liquid state, also called re-sublimation.

Explanation:

Examples include beaches, deltas, glacial moraines, sand dunes and salt domes. In severely cold temperatures frost will form on windows because the water vapor in the air comes into contact with a window and immediately forms ice without ever forming liquid water.

Answer:

V₂ = 107.84 L

Explanation:

Given data:

Initial volume = 100 L

Initial pressure = 80 KPa (80/101 =0.79 atm)

Initial temperature = 200 K

Final temperature =273 K

Final volume = ?

Final pressure = 1 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁T₂  /T₁P₂

V₂ = 0.79 atm × 100 L × 273 K / 200 K × 1 atm

V₂ =21567 atm.L.K /200 K.atm

V₂ = 107.84 L

Answer:

1866.4 secs

Explanation:

The integrated rate law for first order kinetics is given by;

[A] = [Ao] ^-kt

Where;

[A] = concentration of cyclopropane at time = t

[Ao] = initial concentration of cyclopropane

k = rate constant

t = time taken

From the question, we are told that 99% of cyclopropane disappeared hence;

[A] = 0.290 - (0.99 * 0.290)

[A] = 0.290 - 0.2871

[A] = 0.0029 M

Hence

0.0029 = 0.290 e^-2.74 x 10^ - 3 * t

0.0029/0.290 = e^-2.74 x 10^ - 3 * t

0.01 = e^-2.74 x 10^ - 3 * t

ln(0.01) = -2.74 x 10^ - 3 * t

-4.61 = -2.74 x 10^ - 3 * t

t= -4.61/-2.74 x 10^ - 3

t = 1866.4 secs

Answer:

0.13 km/min west

Explanation:

I just did the test.

Answer:

the PH would be 12 the person was correct!

Explanation:

Answer: i would say north pole because the sunlight has to change directions to reach it if that makes since

Explanation: sorry if im wrong

Answer:

Na2SO4 + Bi(NO3)3 = Bi2(SO4)3 + NaNO3

Answer:

Charged ion

Explanation:

Answer:

C!

Explanation:

only C

A: solid B: liquid : C: GAS

Answer:

C.

Explanation:

Gas molecules are always spread far apart, and have room to move freely, so the answer is C.

Answer:

2.5 grams

Explanation:

you can see it on the graph

The process is replication

In the process of cell division and synthesis of new DNA, the stage after replication is called as transcription at which the DNA segments are copied into a RNA molecule.

Replication is the process of dividing the a DNA segment into two equivalent strands. After replication, these two strands will pair with their complementary  RNA strands and the second stage is called transcription.

The process of transcribing a section of DNA into RNA is known as transcription. Messenger RNA is created when specific DNA sequences are translated into RNA molecules that can encode proteins (mRNA).

Non-coding RNAs are RNA molecules that contain copies of other DNA sequences (ncRNAs). The RNA is termed as messenger RNA (mRNA) if the stretch of DNA is translated into an RNA molecule that encodes a protein. The mRNA then acts as a template for the translation of the protein.

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#SPJ2

Answer:

Following are the solution to this question:

Explanation:

In this opinion, Tim Kane believed that its economy can not be badly affected by low manufacturing jobs in 1979, provided, in which an American industrial production had strong potential growth. Their view also opposes whatever Mr. Grove said of lower US employment particularly cos of increased production figures. Their opinion disputes as much as the American.

In Forbes, they wrote that All our industrial production is breaking records with increasing efficiency, despite a low number of industrial workers. Including Mr. grove, he favors beginning for small businesses. It was mainly due to the big advantage of smaller companies or the production of employment.

Answer:

Its B

Explanation:

Answer:

I think the answer is polar covalent as there will be an unequal amount of electrons shared/available. An ionic bond will not take place because the valance shell of the larger atom contains more than 1 electron.

Explanation:

Where's the question?

Answer 15m

Explanation: Distance =  Speed x Time

3 x 5 =15

Answer:

demos los

Explanation:

Answer: Renewable resources can be used again and again. Non-Renewable resources can be used once

Explanation: Sunlight, water, wind, are the renewable resources

Petrol, coal, natural gas are  examples of non-renewable resources.

Answer:

Pressure is a stress. It is a scalar given by the magnitude of the force per unit area. In a gas, it is the force per unit area exerted by the change of momentum of the molecules impinging on the surface. ... It is this force, acting on the surface of the solid, that we call the force due to pressure.

Explanation:

I hope this helps