Which object shares similar physical properties with a bar of soap

Answer:

x = (20 - 3y) / 5

Explanation:

Let

french fires be represented by = x

cheeseburgers be represented by = y

The equation is given as;

5x + 3y = 20.

Rearrange the equation to solve for the  number of French fries.

This means we are to make french fries (x) the subject of equation

5x + 3y = 20

5x = 20 - 3y

x = (20 - 3y) / 5

Answer:

4,3,2

Explanation:

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Answer:

[tex]x_{N_2F_2}= 0.415\\\\x_{SF_6}=0.585[/tex]

Explanation:

Hello!

In this case, since the mole fraction of both gases in the tank is computed via:

[tex]x_{N_2F_2}=\frac{n_{N_2F_2}}{n_{N_2F_2}+n_{SF_6}} \\\\x_{SF_6}=\frac{n_{SF_6}}{n_{N_2F_2}+n_{SF_6}}[/tex]

It means we need to compute the moles of each gas, just as it is shown down below:

[tex]n_{N_2F_2}}=5.53gN_2F_2*\frac{1molN_2F_2}{66.01gN_2F_2} =0.0838molN_2F_2\\\\n_{SF_6}=17.3gSF_6*\frac{1molSF_6}{146.06gSF_6} =0.118molSF_6[/tex]

Thus, the mole fractions turn out:

[tex]x_{N_2F_2}=\frac{0.0838mol}{0.0838mol+0.118mol}= 0.415\\\\x_{SF_6}=\frac{0.0838mol}{0.0838mol+0.0838mol}=0.585[/tex]

Best regards!

Answer:

242X

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Answer:

15×12=180

Explanation:

Force=Mass ×Acceleration

Answer:

Solids cant react to each other because they are the same room temperature

Answer:

A is the correct answer.

Explanation:

A mixture of solids is the correct answer.

Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, when any solute dissolves in a solvent, then the nature of solute and solvent is same.

Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per litre or g/L.

Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule.

Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. when any solute dissolves in a solvent, then the nature of solute and solvent is same.

Therefore, when any solute dissolves in a solvent, then the nature of solute and solvent is same.

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Answer:

t

Explanation:

Answer:

The coldness will move from the pan to the ice cube. ... Thermal energy moved from a cooler object to a warmer object through radiation.

Explanation:

The electronegativity of sugar molecule is the the ability of an atom to attract an electron pair towards itself which is shared with another atom in a chemical bond.

Electronegativity is defined as the ability of an atom to attract an electron pair towards itself when share an electron or electrons with another atom in a chemical bond.

This electronegativity occurs between the atoms which made covalent bond with one another. Sugars also contain covalent bonds because all the covalent bonds in sugar molecules arise as a result of electron sharing between the atoms.

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The given question is incomplete. The complete question is:

A chemist adds 95.0 ml of a 1.5M aluminum chloride solution to a flask. Calculate the mass in grams of aluminum chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Answer:  19.0 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in ml

moles of [tex]AlCl_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{133.34g/mol}[/tex]

Now put all the given values in the formula of molarity, we get

[tex]1.5=\frac{x\times 1000}{95.0\times 133.34}[/tex]

[tex]x=19.0g[/tex]

Therefore, the mass in grams of aluminum chloride the chemist has added to the flask is 19.0

Answer:

B is the answer.

Explanation:

Can i have Brainliest

Answer:

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Answer:

Vapor

Explanation:

Water can occur in three states: solid (ice), liquid, or gas (vapor). ... Water as a gas—vapor is always present in the air around us. You cannot see it. When you boil water, the water changes from a liquid to a gas or water vapor. As some of the water vapor cools, we see it as a small cloud called steam.

Water in the form of a gas is called water vapor. Water vapor refers to the gaseous form of water. It is created when liquid water evaporates or when solid ice sublimates directly into the gas phase

Water vapor is when water turns into gas. This happens when water turns into a gas without becoming a liquid first.

When water molecules get enough energy, their forces between each other become weaker, and they break away from the liquid phase to become water vapor in the gas phase. This happens at any temperature above the point where water turns into steam, which is 100 degrees Celsius (212 degrees Fahrenheit) when the air pressure is normal.

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Answer:

B. Ovule

Explanation:

pistil holds the stigma and the ovule

stem holds the flower

leaf is just a leaf

Answer:

It has hollow bones and jaws.

Explanation:

The cladogram shows that Species C has both hollow bones and Jaws. Species A has hollow bones while species B has Jaws. The cladograms shows that species C has both the characteristics.

Answer:

C. It has neither hollow bones nor jaws.

Explanation:

Answer:

V₂ = 1473.03 L

Explanation:

Given data:

Initial volume = 980 L

Initial pressure = 107.2 atm

Initial temperature = 71 °C (71 +273.15 = 344.15 K)

Final temperature = 13°C (13+273.15 = 286.15K)

Final volume = ?

Final pressure = 59.3 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 107.2 atm × 980L × 286.15 K / 344.15 K×   59.3 atm

V₂ = 30061774.4 atm .L. K / 20408.095 atm. K

V₂ = 1473.03 L

Answer:

36.09% is the mass percent composition of calcium in calcium chloride

Explanation:

Mass percent is defined as one hundred times the ratio between the mass of a compound (In this case, Calcium), and the total mass of the sample:

Mass Percent = Mass compound / Total mass of the sample × 100

Computing the values of the problem:

Mass Percent = 0.690g / 1.912g * 100

Mass percent =

Answer:

t = 21.5 min.

Explanation:

Hello!

In this case, since the kinetics of a first-order reaction is:

[tex]\frac{[A]}{[A]_0}=exp(-kt)[/tex]

Thus, since we are given the 11.7 min for a 58.6-% consumption, we can compute the rate constant, k:

[tex]ln(1-0.586)=-kt\\\\k=\frac{ln(0.414)}{-t}=\frac{-0.882}{11.7min}=0.0754min^{-1}[/tex]

Now, for the second problem, as the new consumption is 80.2%, we can compute the required time as shown below:

[tex]ln(1-0.802)=-kt\\\\t=\frac{ln(198)}{k} \\\\t=\frac{-1.62}{0.0754min^{-1}}\\\\t=21.5min[/tex]

Best regards!

Answer:

The atoms in the cup of coffee have more energy.

Explanation:

The difference between the hot cup of coffee and the piece of ice is their temperature. The hot cup of coffee has a higher temperature than the ice.

The relationship between the energy and temperature is a direct relationship. This means that higher temperature means higher kinetic energy and vice versa.

Since the hot cup of coffee has  a higher temperature, it means it also have the highest amount of energy. The correct option is;

The atoms in the cup of coffee have more energy.

Answer:

a. 2 HgO(s) ⇒ 2 Hg(l) + O₂(g)

b. 0.957 g

Explanation:

Step 1: Write the balanced equation

2 HgO(s) ⇒ 2 Hg(l) + O₂(g)

Step 2: Convert 130.0 °C to Kelvin

We will use the following expression.

K = °C + 273.15

K = 130.0°C + 273.15

K = 403.2 K

Step 3: Calculate the moles of O₂

We will use the ideal gas equation.

P × V = n × R × T

n = P × V/R × T

n = 1 atm × 0.0730 L/0.0821 atm.L/mol.K × 403.2 K

n = 2.21 × 10⁻³ mol

Step 4: Calculate the moles of HgO that produced 2.21 × 10⁻³ moles of O₂

The molar ratio of HgO to O₂ is 2:1. The moles of HgO required are 2/1 × 2.21 × 10⁻³ mol = 4.42 × 10⁻³ mol.

Step 5: Calculate the mass corresponding to 4.42 × 10⁻³ moles of HgO

The molar mass of HgO is 216.59 g/mol.

4.42 × 10⁻³ mol × 216.59 g/mol = 0.957 g

Answer:

A: Both models represent atoms with the same atomic number.

Explanation:

The atomic number equals the number of protons.

The correct statement is that both models represent atoms with the same atomic number.

Isotopes are those molecules which are having the same atomic numbers but different atomic masses.

In the given model both they have the same number of electrons and protons it means they are not ions, but are having different atomic masses as number of neutrons are different.

Hence both models represent atoms with the same atomic number.

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Answer:

EDG 2020

Explanation:

It comes from older rocks,It forms from sediments,it is one of the main 3 rocks, con form from materials solidified from solution.

Answer:

It comes from older rocks.

It forms from sediments.

It is one of the three main types of rocks.

It can form from materials solidified from solutions,

Explanation:

Answer:

d = 4.5 g/cm³

Metal cube is made up off titanium.

Explanation:

Given data:

Edge length of cube = a = 11.4 mm

Mass of metal cube = 6.67 g

Density and identity of metal = ?

Solution:

First of all we will calculate the volume of cube.

V = a³

V = (11.4mm)³

V = 1481.54 mm³

mm³ to cm³:

1481.54 mm³× 1 cm³/ 1000 mm³

1.482 cm³

Density:

d = m/v

d = 6.67 g/ 1.482 cm³

d = 4.5 g/cm³

Metal cube is made up off titanium because density of titanium is 4.5 g/cm³.

Answer:

[tex]9.3x10^{26}molec\ I_2[/tex]

Explanation:

Hello!

In this case, considering the balanced chemical reaction:

Cl₂ + 2LiI ⇒ 2LiCl + I₂

We can see there is a 1:1 mole ratio between the produced iodine and the used chlorine, thus, we infer that the number of molecules of iodine given those of chlorine turn out:

[tex]9.3x10^{26}molec\ Cl_2*\frac{6.022x10^{23}molec\ I_2}{6.022x10^{23}molec\ Cl_2} =9.3x10^{26}molec\ I_2[/tex]

Best regards!

Answer:

9.3 × 10²⁶ molecules of I₂

Explanation:

Step 1: Given data

Step 2: Write the balanced single displacement reaction

Cl₂ + 2 LiI ⇒ 2 LiCl + I₂

Step 3: Calculate the molecules of I₂ produced from 9.3 × 10²⁶ molecules of Cl₂

According to the balanced equation, the molecular ratio of Cl₂ to I₂ is 1:1.

9.3 × 10²⁶ molecule Cl₂ × 1 molecule I₂/1 molecule Cl₂ = 9.3 × 10²⁶ molecule I₂

Answer:

a. Rate constant: 1.2118x10⁻⁴ yrs⁻¹

b. The age of the object is 20750 years

Explanation:

a. We can solve the rate constant in an isotope decay by using Half-Life, as follows:

K = Ln 2 / Half-life

K = ln 2 / 5720 years =

b. The general equation of isotope decay is:

Ln [A] = -kt + Ln [A]₀

Where [A] is concentration of the isotope after time t,

k is rate constant

and [A]₀ initial concentration of the isotope.

Computing the values of the problem:

Ln [0.89x10⁻¹⁴] = -1.2118x10⁻⁴ yrs⁻¹t + Ln [1.1x10⁻¹³]

-2.5144 = -1.2118x10⁻⁴ yrs⁻¹t

20750 years = t

The age of the object is 20750 years

Answer:

When a radioactive atom undergoes a nuclear decay event (the significant decay modes are alpha decay, beta decay, electron capture, and spontaneous fission), the decaying nucleus undergoes a transformation in identity associated with the change in the number of protons in the nucleus

Answer:

see explanation

Explanation:

The polarity of bonds is determined by electronegativity differences. As a guideline we define bonds as:

ionic if Δχ > 2.0

polar if 2.0 > Δχ > 0.5

nonpolar if 0.5 > Δχ

(X being electronegativity)

The polarity of bonds helps us understand non-covalent forces between molecules, such as hydrogen bonding and dipole-dipole interactions. It also helps us interpret the reactivity of molecules. For example, the Si-H bond (χSi = 1.8, χH = 2.1) is more hydride-like than the C-H bond (χC = 2.5, χH = 2.1). Therefore silanes react with acids to make H2, whereas phosphines (χP = 2.1) and hydrocarbons do not. Similarly, electrophilic substitution reactions occur more readily on Si-H and P-H compounds than they do on C-H compounds.

Answer:

12 moles of CO₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CO₂ + H₂O —> H₂CO₃

From the balanced equation above,

1 mole of CO₂ dissolves in water to produce 1 mole of H₂CO₃.

Finally, we shall determine the number of moles of CO₂ that will dissolve in water to produce 12 moles of H₂CO₃. This can be obtained as follow:

From the balanced equation above,

1 mole of CO₂ dissolves in water to produce 1 mole of H₂CO₃.

Therefore, 12 moles of CO₂ will also dissolve in water to produce 12 moles of H₂CO₃.

Thus, 12 moles of CO₂ is required.

Answer:

235.45 cm³

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 220 cm³

Initial temperature (T₁) = 26 °C

Final temperature (T₂) = 47 °C

Pressure = constant

Final volume (V₂) =?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 26 °C

Initial temperature (T₁) = 26 °C + 273

Initial temperature (T₁) = 299 K

Final temperature (T₂) = 47 °C

Final temperature (T₂) = 47 °C + 273

Final temperature (T₂) = 320 K

Finally, we shall determine the volume (i.e V₂) at 47 °C as follow:

Initial volume (V₁) = 220 cm³

Initial temperature (T₁) = 299 K

Final temperature (T₂) = 320 K

Final volume (V₂) =?

V₁ / T₁ = V₂ / T₂

220 / 299 = V₂ / 320

Cross multiply

299 × V₂ = 220 × 320

299 × V₂ = 70400

Divide both side by 299

V₂ = 70400 / 299

V₂ = 235.45 cm³

Thus, the volume at 47 °C is 235.45 cm³