1) Draw a particle picture of liquid lemonade turning into a solid popsicle
BEFORE
AFTER

The mass of  60 g of carbon -14 remains after 17100 years is 7.50 g. Thus, option a is correct.

The unstable isotopes of atoms undergo radioactive decay by the emission of charged particles. The radioactive decay is a first order reaction.

The rate constant k = 1/t ln (M0/Mt)

where, M0 and Mt be the initial mass and mass after t respectively.

Given the initial mass = 60 g

half life t1/2 = 5700 years.

decay constant  k =   0.693 / t1/2

= 0.693 / 5700 = 0.00012 yr⁻¹

Apply the values in the first order rate constant equation as follows:

0.00012 yr⁻¹ = 1/ (17100 yrs) ln (60/Mt)

  60/Mt = 7.996    

        Mt = 7.50 g.

Therefore, the mass of the mass of 60 g of carbon -14 remains after 17100 years would be 7.50 g.

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Answer:

Subscript, or B

Explanation:

AgS is the equation for the chemic reaction of Silver + Sulfur, since the subscript of 2 goes by the g in the equation, this would equal subscript.

Remember subscripts are located at the BOTTOM of a coefficient and superscripts are located at the TOP of a coefficient.

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Answer:

47.6°C is the change of temperature

Explanation:

To solve this question we must use the equation of specific heat of a material:

Q = m*ΔT*S

Where Q is heat applied = 90J

m is the mass of the substance = 15g gold

ΔT is change in temperature = Our incognite

S is specific heat of the material = 0.126J/g°C for gold

Replacing:

90J = 15g*ΔT*0.126J/g°C

90J/15g*0.126J/g°C = ΔT

ΔT = 47.6°C is the change of temperature

Answer:

0.333J/g°C is the specific heat of the metal

Explanation:

The heat that the metaal gives is equal to the heat that water is absorbing. The equation is:

S(metal)*ΔT(metal)*Mass(metal) = S(H2O)*ΔT(H2O)*Mass(H2O)

Where S is specific heat, ΔT is change in temperature and mass the mass in grams of the metal and water.

Replacing:

S(metal)*(100.0°C-27.2°C)*125.0g = 4.184J/g°C*(27.2°C-24.3°C)*250.0g

S(metal) = 4.184J/g°C*(27.2°C-24.3°C)*250.0g / (100.0°C-27.2°C)*125.0g

S(metal) = 0.333J/g°C is the specific heat of the metal

Answer:

discoveries that can change little aspects of our daily lives or finding cures for diseases that have hounded humanity, scientists have been hard at work trying to push us toward a brighter future.

Explanation:

thats what i got from my research :D

Answer:

See Explanation

Explanation:

Let us consider the ionization of these compounds;

H3PO4 ⇔3H^+ + PO4^3-

H3BO3  ⇔3H^+ + BO3^3-

The next to consider is the type of electrolyte the both solution are; the both solutions are weak electrolytes and weak electrolytes do not ionize to a large extent.

The implication of this is that, not so much number of ions is added to the solution due to the poor ionization of these weak electrolytes. Hence, in spite of the subscript of 3, the conductivity of the solution does not significantly improve for the reason stated here quite unlike when strong electrolytes are used.

The reactant necessary for a combustion reaction is oxygen.

(option D).

Combustion is a chemical reaction that occurs when a substance reacts with oxygen, producing heat and light. In order for combustion to take place, three elements are needed: fuel, heat, and oxygen.
Fuel is the substance that undergoes combustion, such as gasoline, wood, or methane. Heat is the energy required to initiate and sustain the reaction. Lastly, oxygen is the reactant that combines with the fuel, allowing it to burn and release energy.
When a combustion reaction occurs, the fuel and oxygen combine to form carbon dioxide (option C) and water (option A). This process is exothermic, meaning it releases energy in the form of heat and light.
For example, when wood is burned in the presence of oxygen, it undergoes combustion. The heat from a match or a spark provides the necessary activation energy to start the reaction. Oxygen from the air combines with the carbon in the wood, producing carbon dioxide and releasing energy in the form of heat and light.
In summary, oxygen is the reactant necessary for a combustion reaction. It combines with the fuel and releases energy in the form of heat and light.

(option D).

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Answer: An element is a substance only containing atoms that have the same number of protons in the chemical nuclei

Explanation:

Answer:

Explanation:

The hydrogen ion concentration can be found by finding the antilog of the pH

[tex]pH = - log [ {H}^{+} ][/tex]

We have

[tex]2.11 = - log({H}^{+}) \\ find \: \: antilog \: of \: both \: \: sides \\ \\ |{H}^{+}| = {10 }^{ - 2.11} \\ = 0.00776...[/tex]

We have the final answer as

0.01 M to 2 decimal places

Hope this helps you

Answer:

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

Explanation:

The equation used depends on what is given in the equation.

The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

It is the quantitative measure related to the acidity or the other liquid solutions. It should be range between the 1 and 10^-14. here the numbers be like from 0 to 14.

Hence, we can say that The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

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Answer:

150 mL

Explanation:

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

Molarity of stock solution (M₁) = 10 M

Volume of diluted solution (V₂) = 3 L

Molarity of diluted solution (M₂) = 0.5 M

Volume of stock solution needed (V₁) =?

The volume of stock solution needed can be obtained as follow:

M₁V₁ = M₂V₂

10 × V₁ = 0.5 × 3

10 × V₁ = 1.5

Divide both side by 10

V₁ = 1.5 / 10

V₁ = 0.15 L

Finally, we shall convert 0.15 L to mL. This can be obtained as follow:

1 L = 1000 mL

Therefore,

0.15 L = 0.15 L × 1000 mL / 1 L

0.15 L = 150 mL

Therefore, the volume of the stock solution needed is 150 mL

Answer:

C) The molecules become separated from each other.

Explanation:

Explanation:

Tha Symbol of gold is Au.

Answer:

symbol of gold is Au

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Answer:

 They have the same amount of energy. They are all positively charged. They are all made up of atoms.

Answer:

they have the same quantity of energy...

Answer:1.4 g/L

Explanation:

One mole of very substance at STP contains a  volume of 22.4 liters. Density can be found by dividing the mass by volume . The density of the gas with a molecular mass of 32 grams is 1.42 g/l.

Density of a substance is the measure of its mass per volume. It represents how much denser it is in a given volume. Density depends on the molecular weight, bond type, volume, temperature and pressure.

STP is defined as the condition of standard temperature and pressure. 293 K and 1 atm pressure are considered to be the standard conditions. At STP, the volume of one mole of every substances contains 22.41 liters.

It is given that the molecular weight of the gas is 32 g/mol. Thus its density in one mole can be calculate as follows:

Density = mass/ volume.

             = 32 g/ 22.4 L

             = 1.42 g/L.

Hence, the density of the gas at STP with molecular mass of 32 g is 1.42 g/L.

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Answer:

.0016

Explanation:

For specific heat problems you use the formula :

Q = mcΔT

They've given you the m, c and delta T, so you can plug in those values. (for the temperature change subtract 10 from 40 to see that it grew 30 degrees)

You're looking for Q so leave that variable in the equation. Then solve.

.Q = (8.00)(.384)(30)

Q = 92.16

92.16 J energy will be absorbed by a copper sample.

Given:

Specific heat  capacity, C= 0.384 J/g °C

Temperature, T₁ = 10.0°C and T₂= 40.0°C

Mass, m=8.00 g

We know that,

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (g) of the material when its temperature increases or 1 °C, and its unit is J/g °C.

Heat energy in terms of specific heat energy can be calculated by using this formula:

Q= m. C. ΔT

∵ΔT= change in temperature,

ΔT=40.0-10.0°C=30°C

Now substituting the values in the above formula.

[tex]Q= 8.0*0.384*30=92.16J[/tex]

Hence, 92.16 J energy will be absorbed by a copper sample.

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Taking into account the definition of frecuency, the statement "The number of waves that pass a point in 1 second" describes the frequency of a wave.

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

In other words, the frequency in wave phenomena, such as sound, electromagnetic waves (such as radio or light), electrical signals or other waves, expresses the number of times the phenomenon is repeated per unit of time. For example, if a wave repeats ten times per second, it means that it has a frequency of ten cycles per second.

Finally, the statement "The number of waves that pass a point in 1 second" describes the frequency of a wave.

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The scattering of the particles of the light in suspension and colloid is the Tyndall effect or scattering.

Colloidal and suspension are the types of solution that contains the mixture of the solute in the solvent. The colloidal solution includes the insoluble solute dispersed in the medium.

The light directed towards the colloidal solution gets scattered by the solute particles present in the solution and hence is used to prove true solutions apart from the colloidal and suspension.

Therefore, the Tyndall effect is the light scattering by colloidal solution.

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Answer:

The correct option is (a) "0.92 V".

Explanation:

The voltage of a galvanic cell made with zinc (Zn) and aluminum (AI) is given by :

Voltage =Ered- Eoxd

Where

Ered = reduction potential

Eoxd = oxidation potential

As per reduction standard potentials, the emf of Zinc is -0.76 V  and the emf of Aluminium is -1.66 V. So,

V = 0.76 - (-1.66)

= 0.9 V

Hence, the correct option is (a) "0.92 V".

Answer:

NMIKCORQW

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Answer:

0.12 dm^3 x (1 mol/24 dm^3) = ? mols N2

mols Cu = ? mols N2 x (3 mols Cu/1 mol N2) = ?

Then g Cu = mols Cu x atomic mass Cu = ?

Answer:

- The chemical reaction is not balanced. There is two oxygens on the reactant's side while there's only one oxygen on the products side.

- I would not say it's following the law of conservation of mass as it's not a balanced equation.

- To balance this equation, you would need to add the coefficient of '2' to Magnesium (Mg) on the reactants side, and add the coefficient of '2' to the products side.  This would make it so that there's 2 Mg's and 2 O's on both the reactant's side and products side.

edit: I hope this helped you in some way. ^^

Answer:

A sugar cube is supposed to be equivalent to a teaspoon of sugar. A teaspoon of sugar is about 4.2 g. Table sugar is composed of sucrose, which is a disaccharide of glucose and fructose, with a molar mass of 342.3 g/mol. This means a sugar cube contains (4.2 / 342.3 =) 0.0123 mol of sucrose, or (0.0123 x 6.022 x 10^23 =) 7.39 x 10^21 molecules of sucrose. As one molecule of sucrose contains one molecule of glucose and one molecule of fructose, then there about 7,400 million, million, million molecules of glucose in a sugar cube.

explanation:

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Answer:

6KClO3 + 3H2SO4 → 2HClO4 + 4ClO2 + 3K2SO4 + 2H2O

Explanation:

It's a bit long because you will keep changing the coefficient to match both side.

Answer:

Final temperature, T2 = 381.28°C

Explanation:

Given the following data;

Mass = 6.23 g

Initial temperature = 30.4°C

Heat capacity = 282 J

Specific heat capacity = 0.129 J/g°C

To find the final temperature;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

Making dt the subject of formula, we have;

[tex] dt = \frac {Q}{mc} [/tex]

Substituting into the equation, we have;

[tex] dt = \frac {282}{6.23*0.129} [/tex]

[tex] dt = \frac {282}{0.8037} [/tex]

dt = 350.88°C

Now, the final temperature T2 is;

But, dt = T2 - T1

T2 = dt + T1

T2 = 350.88 + 30.4

Final temperature, T2 = 381.28°C

Answer:

0.200 M

Explanation:

Step 1: Given data

Step 2: Calculate the moles (n) of CoCl₂ (solute)

We will use the following expression.

n = m / M

n = 2.60 g / (130. g/mol) = 0.0200 mol

Step 3: Calculate the molar concentration of the solution

Molarity is equal to the moles of solute divided by the liters of solution.

M = n/V

M = 0.0200 mol/0.100 L = 0.200 M