(b) Figure 1 shows the melting points and the boiling points of four substances, A, B, C and D.
Figure 1
Temperature
in °C
250
200
150-
100
50
0-
<-50
-100
<-150
-200
-250
*
A
B
*
C
Substance
-X
D
Which substance is liquid over the greatest temperature range?
E
Key
x Melting
point
. Boiling
point

The physical property of both drinks that we can calculate based on the data obtained is density

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula, we get:

d(regular coca cola) = m(regular coca cola)/v(regular coca cola)

d(regular coca cola) = 384 g / 380 ml

d(regular coca cola) = 1.0105 g/ml

d(diet coca cola) = m(diet coca cola)/v(diet coca cola)

d(diet coca cola) = 370 g / 380 ml

d(diet coca cola) = 0.9737 g/ml

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Answer:

3.Ammonia is a compound, and nitrogen and hydrogen are elements.

Explanation:

Look up the differences between elements, compounds and mixtures.

The number of molecules in 60 mg of vitamin C: C6H8O6 is 2.053 × 10¹⁸ molecules.

The number of molecules in a substance can be calculated by multiplying the number of moles in that substance by Avogadro's number.

Firstly, the number of moles in 60mg of vitamin C must be calculated as follows:

Molar mass of C6H8O6 = 12(6) + 1(8) + 16(6) = 176g/mol

number of moles = 0.06g ÷ 176g/mol = 3.41 × 10-⁴moles

Number of molecules = 3.41 × 10-⁴moles × 6.02 × 10²³

Number of molecules = 2.053 × 10¹⁸ molecules

Therefore, the number of molecules in 60 mg of vitamin C: C6H8O6 is 2.053 × 10¹⁸ molecules.

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Answer:

yes

Explanation:

please take to 8 glasses of water everyday

1025 g of aluminum with 912.0 g of oxygen should she react together.

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Pb[tex](NO_{3} )_{2}_{(aq)}[/tex] + 2NaBr[tex]_{(aq)\\}[/tex] → Pb[tex]Br_{2}_{(s)}[/tex] + 2[tex]NaNO_{3}_{(aq)}[/tex]

Lead nitrate solution is added to sodium bromide solution, which results in the formation of solid lead nitrate and the retention of sodium nitrate solution.

Ensure that the equation takes into account the states of each reactant and product. Sodium bromide with Lead (II) Nitrate

Here, lead(II) nitrate (Pb(NO3)2) is combined with sodium bromide (NaBr). White precipitate is the end result.

Salt bromide with silver nitrate

Here, silver nitrate is combined with sodium bromide (NaBr) (AgNO3). White precipitate is the end result.

The lead(II) bromide precipitate is produced by the reaction between solely the lead(II) ions and bromide ions. Before and after, separate potassium and nitrate ions are present.

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Answer: 4

Explanation:

0.03125 kg/31.25 g will remain after 151 years.

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Answer:

309041.2

Explanation:

Combustion is the process where fossil fuels, forests, or other carbon-containing substances are burned, adding more carbon dioxide to the air.

Combustion is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.

Combustion is a type of chemical reaction that occurs between fuel and oxygen leading to the production or generation of light and heat as a form of energy.

Examples of combustion reactions include the following:

Therefore, the question is a correct definition of a type of reaction called the combustion reaction.

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Sodas typically contain flavorings, coloring agents, sugar, and carbon dioxide dissolved in water, so the best term to describe this would be aqueous solution.

Aqueous solutions are the solutions that contain liquid water in them as the solvent that is used to dissolve the various solutes.

When we mix this sugar, flavorings, coloring agents, and carbon dioxide together, we have the aqueous solution of soda.

The word aqueous, which is derived from the Greek aqua, denotes that it is dissolved in or related to water.

It is shown in chemical equations by adding (aq) to the relevant chemical formula.

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Complete Question

Sodas typically contain sugar, flavorings, coloring agents, and carbon dioxide dissolved in water. The best term to describe this mixture would be _____.

A) an aqueous solvent

B) an aqueous solution

C) a solution

D) a solvent

E) a solute

From Smallest to Largest:

Br

I

Al

Ga

The most reasonable explanation is, Sodium chloride and Water are both polar compounds while Glucose is nonpolar.

Since glucose is a non-polar compound while NaCl is polar, we know that polar compounds will dissolve in polar solvents while non-polar compounds will dissolve in non-polar ones. water also dissolves NaCl but not glucose because it is a polar molecule.

Due to their bonds with elements like nitrogen, oxygen, or sulfur, polar compounds have distinct zones of positive and negative charge.

Non-polar covalent compounds, on the other hand, are those in which there is no change in electronegativity. In these compounds, the electronegativity does not change, preventing the motion of the bond pair's electrons in the direction of the linked atoms.

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Using Avogadro’s number, 0.33 moles of tin are present.

The number of particles (atoms or molecules) in each mole of a material is known as the Avogadro’s number. It's represented with a symbol [tex]N_A[/tex].

Avogadro's number of molecules of that substance make up one mole of an atom, according to the mole concept.

1 mole = 6.02 x [tex]10^2^3[/tex] atoms

Given:

No. of atoms of tin = 2.01 x [tex]10^2^3[/tex]

Avogadro’s number, [tex]N_A[/tex]= 6.02 x [tex]10^2^3[/tex]

To find:

No. of moles, n = ?

Formula:

n = No. of atoms of tin / Avogadro’s number

Calculations:

n = 2.01 x [tex]10^2^3[/tex] / 6.02 x [tex]10^2^3[/tex]

n = 2.01 / 6.02

n = 0.33 moles

Result:

The number of moles present in 2.01 x [tex]10^2^3[/tex] atoms of tin is 0.33 moles

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Answer:

Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type.

Explanation:

The Covid-19 pandemic has raised awareness of a situation that can be surprisingly unpleasant for many people: asking for help. From practical difficulties, like finding someone to do your food shopping, to emotional ones, like dealing with anxiety and sadness alone.

Problems with mental health do not resolve themselves. Treatment and recovery may be more challenging the longer an illness lasts. When anxiety and trauma are not addressed, they can both worsen and result in panic episodes and post-traumatic stress disorder. an incapacity to handle issues or regular tasks. a sense of detachment or disconnect from daily activity imaginative or unusual thinking. excessive worry persistent melancholy, depression, or apathy.

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The reaction that destroys ozone in the stratosphere is [tex]3Cl_2 + 2O_3 --- > 6ClO[/tex]

The ozone layer is a stratospheric layer that shields the planet from harmful radiations coming from the sun. A type of UV radiation known as UVB is known to cause harmful effects on plants and animals, including humans.

The ozone layer is destroyed by halogen-based pollutants such as chlorofluorocarbon (CFC). When these pollutants are exposed to intense UV radiation at the stratospheric layer, they release halogens.

For example, CFC releases chlorine when exposed to intense UV radiation.  Chlorine molecules are capable of reacting with ozone to form chlorine monoxide (ClO) according to the following equation:

[tex]3Cl_2 + 2O_3 --- > 6ClO[/tex]

Thus, the stratospheric ozone layer is gradually removed by chlorine.

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According to the research, the correct options are faults and mountains. These are features form along all types of plate boundaries.

They are the contact areas of the lithosphere between plates, we call them boundaries or edges, where new oceanic crust is formed and in which the plates separate, there are three plate boundaries which are:

In this sense, since they are areas of great geological activity, they have a varied topography since tensional forces are produced that cause their movement that forms mountains and fault blocks.

Therefore, we can conclude that according to the research, the correct options  are faults and mountains. These are features form along all types of plate boundaries.

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Answer:

A

Explanation:

K and L values for each substance are 108g and 18g, respectively.

Solubility is the formation of a new bond between solute molecules and solvent molecules. Solubility is the maximum concentration of solute that dissolves in a known concentration of solvent at a given temperature in terms of quantity.

We calculated the solubility of NaCl in 100g of water to be 36g.

Lead Nitrate solubility in 100g water = 54g

Determine the value of L:-

200Kg sodium chloride solubility = 36g

100kg Sodium chloride Solubility = [tex]\frac{36g}{100kg} *200kg[/tex] = 18g

Determine the value of K:-

100Kg Lead Nitrate Solubility = 54g

200kg Lead Nitrate Solubility = [tex]\frac{54g}{100kg} *200kg[/tex] = 108g

Solubility difference = solubility of K - solubility of L

Solubility difference = 108g - 18g = 90g

Thus, the 108g and 18g, are the values for K and L respectively.

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Answer:

concentrated=strong

dilute=weak

Order of solar system :

1. A solar nebula develops.

3. The solar nebula is pulled in on itself by gravity.

5. The solar nebula continues to rotate quickly.

2. The solar nebula becomes flat and forms a disk.

4. Gas turns hot and dense and develops into a star.

It is a cloud with a disc shape.

It is made up of the gas and dust left over after the sun forms.

The following are the steps involved in the creation of the solar system:

A solar nebula first appears after the sun is formed.

In the subsequent stage, gravity uses its force to pull the nebula toward it.

This force causes the nebula to travel too swiftly.

Gravity causes the nebula to spin quickly, giving it the appearance of a disc.

Finally, this disc-shaped nebula's temperature rises, making the gases inside it hot and heavy.

This results in a "star" (ball of fire) being produced in the end.

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The complete question is:

Put these steps of solar system formation in order.

1) A solar nebula forms.

2) The solar nebula flattens into disk

3) gravity pulls the solar nebula upon itself

4) gas becomes hot and dense and forms a star

5) the solar nebula spins faster and faster

The most beneficial towards maintaining the equilibrium in an ecosystem over a long period of time is to Diversity of organism.

A ecosystem maintains equilibrium by ensuring that each organism has resources and proper living condition fort the survival.  four factors balance an ecosystem is water cycle, mineral cycle, energy flow and community dynamics. An ecosystem is place where plants and other organism interact with nonliving factor like weather.

Biodiversity or biological diversity , refers to all the variety of life that exist on earth. our planet is full of variety of living organisms .An ecosystem must have the greatest amount of producers, followed by primary consumers and having smallest no. of tertiary consumers.

hence,The most beneficial towards maintaining the equilibrium in an ecosystem over a long period of time is to Diversity of organism.

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The reaction of Cr₂o₃ with silicon metal at high temperatures will make chromium metal.

The given statement is true.

This reaction shows the formation of Cr when Cr₂O₃ reacts with silicon metal which signifies that chromium metal is formed

2 Cr₂O₃ (s) + 3Si (s) ------> 4Cr (l) + 3SiO₂ (s)

40.47 g of Si and 146.00 g of Cr₂O₃ will be used to produce 1.921 mol of Chromium.

This reaction would give liquid Chromium metal, which isn't the pure form of metal.

Pure Chromium metal can be obtained from the thermal reduction of Cr₂O₃ with aluminum.

Cr₂O₃(s) + 2Al(l) --> 2Cr(l) + Al₂O₃(s)

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Explanation:

B → Boron → Atomic number 5

Be → beryllium → Atomic number 4

B - Hybridization → 1S² 2S² 2P¹

[tex] \sf Boron - \boxed{↿↾} \: \boxed{↿↾} \: \boxed{ \small↾ }\huge\boxed{ }\huge\boxed{ }[/tex]

Be - Hybridization → 1S² 2S²

[tex] \sf Beryllium →\boxed{↿↾} \: \boxed{↿↾} \: \huge\boxed{ }\huge\boxed{ }\huge\boxed{ }[/tex]

from above data we can see that the outermost orbital of Beryllium i.e. 2S is fully filled & that of boron have 1 electron in 2P orbital. It will require more energy to remove one electron from beryllium Because it will disturb the stability, on other hand the boron will lose one electron easily to attain full filled outermost electron hence it will require less energy for 1st ionization.

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The most reasonable explanation is,  sodium chloride and Water are both polar compounds while Glucose is nonpolar.

Since glucose is a non-polar compound while NaCl is polar, we know that polar compounds will dissolve in polar solvents while non-polar compounds will dissolve in non-polar ones. H2O also dissolves NaCl but not glucose because it is a polar molecule.

Due to their bonds with elements like nitrogen, oxygen, or sulfur, polar compounds have distinct zones of positive and negative charge.

Non-polar covalent compounds, on the other hand, are those in which there is no change in electronegativity. In these compounds, the electronegativity does not change, preventing the motion of the bond pair's electrons in the direction of the linked atoms.

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The ocean floor is largely made of Volcanic rock formed by magma from earth’s mantle that cools and hardens.

The ocean's bottom is referred to as the seabed, seafloor, ocean floor, and ocean bottom. All oceanic floors are referred to as "seabeds." The various types of sediment that make up practically the whole ocean floor include mud, sand, and gravel.

Deposits of minerals we need every day, such copper, zinc, nickel, gold, silver, and phosphorous, can be found on the seafloor. These deposits are nodules on silt from the abyssal plain that are typically 3 to 10 centimetres (1 to 4 inches) in diameter and appear as crusts on volcanic and other rocks.

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(c)The number of moles of  Na₂CO₃ , in the original 50ml of solution is  0.0093 moles Na₂CO₃ is present.

(d) Disagree, if grams of CaCO₃ is inflated by being wet Na₂CO₃ is inflated and inflating the molarity value.

(e) After the precipitate form and is filtered, the soluble spectator ions removed. I expect that the filtrate conduct electricity.

The balanced equation is given by :

Na₂CO₃  +   Ca(NO₃)₂   ------->    CaCO₃   +    2NaNO₃

(c) no. of moles of Na₂CO₃  =  ?

mole of Ca(NO₃)₂ = 100 ml = 0.1 L × 1mol/L = 0.1 moles of Ca(NO₃)₂

moles of CaCO₃  formed = mass / molar mass

                                        = 0.93 g / 100 g/mol

                                         =  0.0093 mols

from reaction it is clear that , Na₂CO₃ and Ca(NO₃)₂ is in 1:1 ,

one mole  CaCO₃ obtain from 1 mole of  Na₂CO₃

so, no. of moles Na₂CO₃ is originally present originally:

=  0.0093 moles CaCO₃ × 1 moles of Na₂CO₃  /  1mol CaCO₃

=  0.0093 moles Na₂CO₃ is present.  

(d) Disagree, if grams of CaCO₃ is inflated by being wet Na₂CO₃ is inflated and inflating the molarity value.

(e) After the precipitate form and is filtered, the soluble spectator ions removed. I expect that the filtrate conduct electricity.

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Value of n is NaCO3: 0.103/0.07= 1.47 and

h2o: 0.07/0.07= 1.

Mole, also spelled mol, in chemistry, standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

The mole designates an extremely the large number of units, 6.02214076 × . The mole was previously defined as number of atoms determined experimentally to be found in 12 grams of carbon-12.

The number of units in a mole also bears name Avogadro’s number, or Avogadro’s constant,

The number of atoms or the other particles in a mole is the same for all substances. The mole is related to mass of an element in the following way: one mole of carbon-12 atoms has 6.02214076 × atoms and a mass of 12 grams.

In comparison, one mole of oxygen consists, by definition, of same number of atoms as carbon-12, but it has a mass of 15.999 grams. Oxygen, therefore, has greater mass than carbon. This reasoning also can be applied to the molecular or formula weights.

The mass of anhydrous NaCO3 representing CO2 production is calculated:

m NaCO3 = 0.457*(106 NaCO3/ 44g co2)= 1.10g

Mass of water is calculated:

m h2o =1.85g-0.457= 1.393g

Moles of each component are calculated:

n NaCO3= 1.10/106 = 0.103 mol

n h2o = 1.393/18 = 0.07 mol

They are divided by smallest:

NaCO3: 0.103/0.07= 1.47

h2o: 0.07/0.07= 1

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