What is the volume of a book that is 22.0 cm tall, 13 cm wide, and 3.2 cm thick? Use sig figs and correct units


1. 915.2 cm

2. 920 cm

3. 920 cm^3

4. 915 cm^3

Answer: the density of the bread is 0.2g per 1 cm3

Explanation: density is defined as mass per volume d= m/v so we can calculate 500g÷ 2500cm3= 0.2g/1 cm3

Explanation:

For most folks, a thermometer reading around 98.6 degrees Fahrenheit (37 degrees Celsius) means their body temperature is normal. Now, two scientists have an idea why our bodies, as well as those of most other mammals, consistently run at that temperature : A toasty body temperature helps keep nasty fungal infections at bay.

"One of the mysteries about humans and other advanced mammals has been why they are so hot compared with other animals," said study co-author Arturo Casadevall, professor and chair of microbiology and immunology at Albert Einstein College of Medicine of Yeshiva. "This study helps to explain why mammalian temperatures are all around 98.6 degrees Fahrenheit."

Casdevall's previous work showed that the number of fungal species that can thrive and, therefore, infect an animal declines by 6 percent for every 1.8 degree F (1 C) rise in temperature. This, he claimed, is why reptiles , amphibians and other cold-blooded animals are susceptible to tens of thousands of fungal species, whereas only a few hundred types of fungi can harm humans and other mammals.

Answer:

The statement that best describes pseudoscience is that it lacks a process for collecting data

Answer: not a branch of science and involves beliefs and opinions

Explanation:

Answer:

830 mL or 0.83L

Explanation:

Answer:

Condensation starts to occur throughout the liquid instead of just on the surface.

Answer:

• 1.62432 moles of nitrogen

• Tire Pressure: 2.74 * 10⁵ Pa

• The tires will burst

• Pressure: 244 kPa

Explanation:

• We can determine the number of moles of nitrogen using the formula pV = nRT, where p = pressure, V = volume, n = number of moles, R = gas constant, and T = absolute temperature.

Now remember we have our initial pressure in kilopascals so let's convert to pascals (249 pascals). The volume is given in liters, so let's convert into m². And the initial temperature is given in Celsius ⇒ our absolute temperature in Kelvins.

[tex]\mathrm{p\:}=\mathrm{249 kPa\:} = \mathrm{2.49 * 10^5\:},\\\mathrm{15.6L\:} =\mathrm{0.0156m^2\:},\\\mathrm{R\:}=\mathrm{8.314J/mol*K\:},\\\mathrm{T\:}=\mathrm{21C\:} + \mathrm{273\:}=\mathrm{294K\:}[/tex]

Respectively the moles of nitrogen in each tire should be:

[tex]\mathrm{n\:}=\mathrm{pV/RT\:}=\mathrm{(2.49*10^5)(0.0156)/(8.314)(294)\:}=\frac{\left(2.49\cdot \:10^5\right)\left(0.0156\right)}{\left(8.134\right)\left(294\right)}=\frac{3884.4}{2391.396}\\[/tex]

[tex]= 1.62432\dots \mathrm{moles\:}\mathrm{of\:}\mathrm{nitrogen\:}[/tex]

• We can solve this part similarly. All our values will be the same, besides the temperature, as we have to consider both the initial and final temperature here.

[tex]\mathrm{T_2\:}=\mathrm{51C+ 273\:} }=\mathrm{324K\:} }[/tex] -

[tex]\mathrm{p_2\:}=\mathrm{(2.49*10^5)(324)/(294)\:} }=\frac{\left(2.49\cdot \:10^5\right)\left(324\right)}{294}=\frac{40338000}{147}=274408.16326\dots[/tex]

[tex]=2.74408.16326*10^5\dots\mathrm{Pa}[/tex]

• The text mentions that the tires will burst when the internal pressure reaches 269kP. From part #2 we know that the final pressure will be, in kilopascals, 274kP. As 274 > 269, the tires will burst in Death Valley.

• We would want the final temperature = breaking pressure. Therefore,

[tex]\mathrm{p_2\:}=\mathrm{(269)(294)/(324)\:} }=\frac{79086}{324}=\frac{13181}{54}=244.09259\dots\mathrm{kPa\:} }[/tex]

Answer: 22 neutrons

Explanation: 40 is the mass number = atomic mass = total number of protons and neutrons in atomic nucleus

18 is the number of protons in the nucleus of this atom

Then 40 - 18 = 22 neutrons

and this is Argon

Answer:

The answer is "1".

Explanation:

It is the lone pairs at, which the central atom provides the molecular and the polarity. It is only for substances with just a central atom, for which the molecules with only one central atom and only one of the solitary paired were required, that's why in this question the "1" is the correct answer.

Answer:

Percent yield = 21%

Explanation:

Find:

Percent yield

Computation:

1 mol O₂ produces 2 mol NO₂

So,

10 mol O₂ produces 20 mol NO₂

Percent yield = [Actual yield / Theoretical yield]100

Percent yield = [4.2 / 20]100

Percent yield = 21%

The percent yield for the reaction is 21%

From the question,

We are to determine the percent yield for the reaction.

First, we will determine the theoretical yield for the reaction

From the given balanced chemical equation for the reaction

2 NO (g) + O₂ (g) → 2 NO₂ (g)

This means,

2 moles of NO reacts with 1 mole of O₂ to produce 2 moles of NO₂

From the given information,

Number of moles of O₂ that reacted = 10.0 moles

Since,

2 moles of NO reacts with 1 mole of O₂ to produce 2 moles of NO₂

Then,

2×10 moles of NO will be required to react with the 10 moles of O₂ to produce 2×10 moles of NO₂

That is,

20 moles of NO will be required to react with the 10 moles of O₂ to produce 20 moles of NO₂

∴ 20 moles of NO₂ will be produced during the reaction.

This is the theoretical yield

Now, for the percent yield of the reaction,

Using the formula

[tex]Percent\ yield = \frac{Actual\ yield }{Theoretical\ yield} \times 100\%[/tex]

From the question

Actual yield = 4.2 mole

∴ Percent yield for the reaction = [tex]\frac{4.2}{20 }\times 100\%[/tex]

Percent yield for the reaction = [tex]\frac{420}{20}\%[/tex]

Percent yield for the reaction = 21%

Hence, the percent yield for the reaction is 21%

Learn more here: https://brainly.com/question/13575547

Answer:

When changing state of aggregation, the particles change their kinetic energy, decreasing or increasing, if their kinetic energy decreases the collision between the particles is less, and therefore less heat is released and more space will exist between them, this is an example of the states of aggregation that occupy large expandable volumes such as gas.

As the particles get closer, the molecules are closer and collide in a greater way, thus generating that the kinetic energy increases, the friction also and these particles are closer to each other, compressing the space and limiting their movement up to a point.

Explanation:

The states are three, solid liquid and gaseous-

In the solid state there is less distance between the particles, greater density of the body and greater force of friction or collision.

On the other hand, in the solid state the particles are more distended but up to a limit they expand, different from the gaseous state that their particles expand more and without a limit.

The states are modified according to the different temperatures that the body undergoes, at a higher temperature a higher kinetic energy and greater friction are usually reached, generating relaxed states such as liquid and gas, and at lower temperatures it is the reverse effect.

Answer:

.0388 atm

Explanation:

Since temperature is not given , we assume that it is constant . So we can apply Boyle's law . According to it

P₁ V₁ = P₂ V₂

P₁ and V₁ are pressure and temperature initially and P₂ and V₂ are pressure and volume finally .

Putting the given values

.12 x 2.31 = 7.14 x P₂

P₂  = .12 x 2.31 / 7.14

= .0388 atm .

Answer:

Storage battery oe cell

Explanation:

The storage battery or cell is a device that coverts chemical energy into light energy when required.

During charging of battery, there is some chemical changes in the battery and absorb energy. The absorbed energy is converted into electrical energy when connected to an external load.

Hence, the correct answer is "Storage battery or cell".