A block of aluminum occupies a volume of 17.8 mL and weighs 51.3 g. What is its density?

Answer:

Explanation:

The quantity of sugar in the bar of milky chocolate of  45 g is 25 g of sugar

u can use this information to calculate the amount of the sugar in any amount .

mass of sugar in 14.630 g →

     chocolate mass                 sugar mass

         45 g                                    25 g

       14.630                                     x      

                                                            X= mass of sugar = 8.13 g

now  for 3 gram of chocolate :

          45 g                                   25 g

           3.000                                 x

    X = 1.667 grams of sugar

Answer:

1/100,000

Explanation:

its radius is only about 1/100,000 of the total radius of the atom. if an atom were the size of a football stadium, the nucleus would be about the size of a pea! Electrons have virtually no mass, but protons and neutrons have a lot of mass for their size. As a result, the nucleus has virtually all the mass of an atom.

Answer:

The final temperature of the water-steel system is 16.853 ºC.

Explanation:

We consider the system of water sample and the piece of steel as control mass, which is supposed to be an isolated system, that is, a system with no mass and energy transfer with surroundings. As water has more mass and a higher specific heat that piece of steel, it is very unlikely that evaporation and condensation would affect the outcome.

The piece of steel is cooled down while water is heated up, until thermal equilibium is reached. By First Law of Thermodynamics, we must observe that:

[tex]Q_{water}-Q_{steel} = 0[/tex]

[tex]Q_{water} = Q_{steel}[/tex]

Where:

[tex]Q_{water}[/tex] - Heat received by the water sample, measured in joules.

[tex]Q_{steel}[/tex] - Heat released by the piece of steel, measured in joules.

Now, we expand each term by definition of sensible heat:

[tex]m_{w}\cdot c_{w}\cdot (T-T_{w,o})=m_{s}\cdot c_{s}\cdot (T_{s,o}-T)[/tex]

Where:

[tex]m_{w}[/tex], [tex]m_{s}[/tex] - Masses of the water sample and the piece of steel, measured in kilograms.

[tex]c_{w}[/tex], [tex]c_{s}[/tex] - Specific heat of water and steel, measured in joules per kilogram-Celsius.

[tex]T_{w,o}[/tex], [tex]T_{s,o}[/tex] - Initial temperatures of the water sample and the piece of steel, measured in Celsius.

[tex]T[/tex] - Final temperature of the sample-piece system, measured in Celsius.

The final temperature is cleared:

[tex](m_{w}\cdot c_{w}+m_{s}\cdot c_{s})\cdot T = m_{w}\cdot c_{w}\cdot T_{w,o}+m_{s}\cdot c_{s}\cdot T_{s,o}[/tex]

[tex]T = \frac{m_{w}\cdot c_{w}\cdot T_{w,o}+m_{s}\cdot c_{s}\cdot T_{s,o}}{m_{w}\cdot c_{w}+m_{s}\cdot c_{s}}[/tex]

If we know that [tex]m_{w} = 1\,kg[/tex], [tex]m_{s} = 0.370\,kg[/tex], [tex]c_{w} = 4186\,\frac{J}{kg\cdot ^{\circ}C}[/tex], [tex]c_{s} = 460\,\frac{J}{kg\cdot ^{\circ}C}[/tex], [tex]T_{w,o} = 9\,^{\circ}C[/tex] and [tex]T_{s,o} = 210\,^{\circ}C[/tex], the final temperature of the system is:

[tex]T = \frac{(1\,kg)\cdot \left(4186\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (9\,^{\circ}C)+(0.370\,kg)\cdot \left(460\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (210\,^{\circ}C)}{(1\,kg)\cdot \left(4186\,\frac{J}{kg\cdot ^{\circ}C} \right)+(0.370\,kg)\cdot \left(460\,\frac{J}{kg\cdot ^{\circ}C} \right)}[/tex]

[tex]T = 16.853\,^{\circ}C[/tex]

The final temperature of the water-steel system is 16.853 ºC.

the answer is 385 miles

Answer:

The nurse should administer 3995.2 millilitres of syrup.

Explanation:

The conversion factor of pound weight to kilogram is; 1 lb = 0.453592 kg

The body weight of the patient in Kg = 150 * 0.453592 = 68.04 kg

A prescription of 7.34 mg/kg acetaminophen means that he should receive;

7.34 mg * 68.04 = 499.4 mg of acetaminophen

Amount in grams of acetaminophen per millilitre of syrup = 0.125 mg

Number of millilitres of syrup required = 499.4 mg / 0.125 mg/mL = 3995.2 mL

Therefore, the nurse should administer 3995.2 millilitres of syrup.

Answer:

Independent variable: The light intensity (what YOU CHANGE)

Dependent variable: The rate of transpiration (what YOU MEASURE)

Independent variable are the light intensity that what we change and dependent variable are the rate of transpiration that what we measure.

Photosynthesis is the process that can be used by the plants and other animals to covert light energy into the chemical energy. Photosynthesis is the main source of food in the earth.

Photosynthesis is the process in which oxygen is released. For survival oxygen is very important, from this process we obtain sufficient amount of oxygen.

The dependent variable is the rate of transpiration and the independent variable is time.The dependent variable is the rate of transportation because it is depends on the environmental factor the plant is placed.

Thus,Independent variable are the light intensity that what we change and dependent variable are the rate of transpiration that what we measure.

To learn more about the photosynthesis, follow the link;

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Your answer would be D.

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass of substance = 769.09 g

volume = 17.38 cm³

The density is

[tex]density = \frac{769.09}{17.38} \\ \equiv44.2514384...[/tex]

We have the final answer as

Hope this helps you

I think that it's cannot include supernatural explanations, or C.

If i got it wrong sorry  

Answer:

[tex]\rho=3.1g/mL[/tex]

Explanation:

Hello,

In this case, considering that the density of a body is computed given its mass and volume:

[tex]\rho =\frac{m}{V}[/tex]

Taking into account that the mass is 24.32 g and the volume is computed via the difference between the volume of the water with the brass and the volume of water by itself as follows:

[tex]V=13.50mL-5.60mL=7.9mL[/tex]

The density of the piece of brass turns out:

[tex]\rho =\frac{24.32g}{7.9mL}\\\\\rho=3.1g/mL[/tex]

Best regards.

Answer:

Generally intensive properties are properties that are dependent on mass

So from  the list given in the question we see that

       P => pressure

       V  =>  volume

       [tex]\rho[/tex] => density

      T => tension

Are intensive properties

Generally extensive properties are properties that are increase or decreased by mass i.e that scale with mass  i.e the are properties that their value is proportional to the quantity of matter(mass) in the system  

So from  the list given in the question we see that

       m => mass

       V =>  volume

Non -properties are

    F => Force

    a = > acceleration

     L => length

    t =>  time

     v => velocity

Explanation:

As per the question separate the P, V, F, v and rho and T a and m and L then we have intensive properties and an extensive property and a non extensive property

Learn more about the  list P, F, V, v, rho, T, a, m, L.

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Answer:

1st part:  line graph

2nd part: bar graph

Explanation:

edge, yw!

When solid converts to liquid then heat is required to break the intermolecular forces of attraction between the particles. Therefore, 1st part is  line graph and 2nd part is bar graph.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing. 1st part is line graph and 2nd part is bar graph.

Therefore, 1st part is  line graph and 2nd part is bar graph.

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Answer:

[tex] \boxed{\sf Specific \ heat \ of \ the \ substance \ (c) = 0.85 \: J/g \degree C } [/tex]

Given:

Mass (m) = 10.0 g

Rise in temperature (∆T) = 8.58°C

Energy required (Q) = 73.2 J

To Find:

Specific heat of the substance (c)

Explanation:

Specific heat (c) of a substance is the energy required to raise the temperature of one gram of the substance by one degree Celsius.

Formula of specific heat is given as:

[tex] \boxed{ \bold{c = \frac{Q}{m\Delta T}}}[/tex]

By substituting value of Q, m & ∆T in the formula we get:

[tex] \sf \implies c = \frac{73.2}{10 \times 8.58} \\ \\ \sf \implies c = \frac{73.2}{85.8} \\ \\ \sf \implies c = 0.85 \: J/g \degree C [/tex]

Answer:

[tex]Increase=98.8ppm[/tex]

[tex]Average\ increase/year=1.594\frac{ppm}{year}[/tex]

Explanation:

Hello,

In this case, since the nowadays concentration of CO2 is 414.51 ppm and the concentration in 1958 was 315.71 ppm, the total increase is computed via the difference between them:

[tex]Increase=414.51ppm-315.71ppm\\\\Increase=98.8ppm[/tex]

Moreover, the average increase per year is computed considering that from 1958 to 2020, 62 years have passed, therefore, such average is:

[tex]Average\ increase/year=\frac{98.8ppm}{62 years} \\\\Average\ increase/year=1.594\frac{ppm}{year}[/tex]

Regards.

A. The total increase in March concentration (in ppm) from 1958 to 2020 is 98.8 ppm

B. The average increase per year is 1.59 ppm / year

Increase = (Concentration in March 2020) – (Concentration in March 1958)

Increase = 414.51 – 315.71

Increase = 98.8 ppm

Increase per year = Increase / Total year

Increase per year = 98.8 / 62

Increase per year = 1.59 ppm / year

Learn more about percentage increase:

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Answer:

B) is greater in cool liquid water than in warm liquid water.

Explanation:

The solubility of oxygen in water is more in cold water in comparison to warm water.

The solubility of oxygen in water depends on the temperature as in warm water, more oxygen is released while in cold water, less oxygen is released and more oxygen get dissolved.

Hence, the correct option is "B".

Answer:  is greater in cool liquid water than in warm liquid water.

Explanation:

he solubility increases with the increase in the partial pressure of oxygen at a constant temperature and concentration.

Answer:

Flammability.

Explanation:

Chemical properties of a substance are properties of a substance that occur in the chemical reactions in which it is involved.  These are the basis for the classification of substances, such as metals, halogens, acids, alcohols, alkenes, arenes, etc. A class of substances is characterized by chemical properties common to that group. Differences in the chemical and physical properties of substances allow the substance to be identified, and the components of a mixture of substances to be separated and purified.

The chemical properties of a substance are its chemical stability, reactivity, oxidizability, acidity, bromine number, polymerisability, flammability, toxicity, etc. These can be determined by chemical exposure.

Given :

Radius of uranium atom , [tex]R=149\ pm = 149\times 10^{-12}\ m[/tex] .

To Find :

How many uranium atoms would have to be laid side by side to span a distance of 1.66 mm .

Solution :

Diameter of uranium atom :

[tex]D=2r=2\times 149\times 10^{-12}\ m\\\\D=298\times 10^{-12}\ m[/tex]

Number of atoms are :

[tex]n=\dfrac{D}{d}\\\\n=\dfrac{1.66\times 10^{-3}\ m}{ 298\times 10^{-12}\ m}\\\\n=5.57\times 10^{6}[/tex]

Hence , this is the required solution .

From the figure we can notice that the tip is ended surely before 9 cm .

Also , the tip crossed two cuts after 8 .

Therefore , it is greater than 8.2 .

Now , if we see that the tip end between 2 and 3 .

Therefore , the best estimate is 8.25 cm .

Hence , this is the required solution .

Answer:

8

Explanation:

because 14 - 6 is 8

Answer: The answer is "What are the effect of low pH in soil"  

Explanation: This is because this can be tested and because it is not a opinion or a moral value. Thus this question can be tested with the scientific method.

The question that can be answered by science is "What are the effects of low pH in soil". Thus, the correct option for this question is D.

Science may be defined as a branch of scientific study that involves the application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence.

It can broadly be classified into three categories such as Physics, Chemistry, and biology. Each sub-classification illustrates its own field of detailed study.

Science always deals with the concept of nature as well as natural phenomena. So, among the given options, the soil is an abiotic component of nature.

The effects of low pH in the soil depend on various factors like the complexity of organisms living on a particular area, resources, pollution level, etc.

Therefore, the question that can be answered by science is "What are the effects of low pH in soil". Thus, the correct option for this question is D.

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These elements are located in the upper right and lower left corners of the periodic table and in certain element groups. The halogens, alkali metals, and alkaline earth metals are highly reactive. The most reactive element is fluorine, the first element in the halogen group.

Answer:

Explanation:

mass of the hydrogen atom in C3H8= 4.58 gram

C3H8                         8H

25.2 gram                  x

(3x12)+ 8                   8x1

    x =  4.58 grams of H

# moles of hydrogen = mass/m.wt

                                 = 4.58/8= 0.57 mole of hydrogen atom

Answer:

The final and initial concentration of the acid and it's conjugate base are approximately equal, that is we use the weak acid approximation.

Explanation:

The Henderson-Hasselbalch is used to calculate the pH of a buffer solution. It depends on the weak acid approximation.

Since the weak acid ionizes only to a small extent, then we can say that [HA] ≈ [HA]i

Where [HA] = final concentration of the acid and [HA]i = initial concentration of the acid.

It also follows that [A^-] ≈ [A^-]i where [A^-] and[A^-]i refer to final and initial concentrations of the conjugate base hence the answer above.

Answer:

plum pudding model .

Explanation:

the electrons were 'like plums embedded in a pudding'. Also called the Raisin Bread Model.