Is cardboard a solid

Answer: Nuclear fusion- The simple answer is that deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus and generate a tremendous amount of energy at the same time.

Answer:

15 grams of water

Explanation:

15 grams of water of water would lose heat the faster compared to higher masses of water.

Water generally is a poor conductor heat.

Molecular polarity is important for life because it plays a crucial role in many biological processes.

Molecular polarity refers to the distribution of electrical charge within a molecule. It is a property that results from differences in the electronegativity of the atoms in a molecule.

Molecular polarity is important for life because many biological molecules, including proteins, DNA, and carbohydrates, are polar, meaning they have regions of positive and negative charge.

This allows them to interact with other polar molecules, such as water, through hydrogen bonding, which helps to stabilize their structures and maintain their functionalities.

More on molecular polarity can be found here: https://brainly.com/question/4248472

#SPJ1

Two ways in which scientists can exhibit ethical behavior are

Science can simply be defined as an intellectual and proven practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

So therefore, two ways in which scientists can exhibit ethical behavior are

Learn more about science:

https://brainly.com/question/1729104

#SPJ1

Answer:

electrons are combining with other electrons

Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.

For such more question on molecules

https://brainly.com/question/475709

#SPJ8

Answer:

0.052 M

0.059 m

Explanation:

There is some missing info. I think this is the complete question.

A student dissolves 4.6 g of glucose in 500 mL of a solvent with a density of 0.87 g/mL. The student notices that the volume of the solvent does not change when the glucose dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits.

Step 1: Calculate the moles of glucose (solute)

The molar mass of glucose is 180.16 g/mol.

4.6 g × 1 mol/180.16 g = 0.026 mol

Step 2: Calculate the molarity of the solution

0.026 moles of glucose are dissolved in 500 mL (0.500 L) of solution. We will use the definition of molarity.

M = moles of solute / liters of solution

M = 0.026 mol / 0.500 L = 0.052 M

Step 3: Calculate the mass corresponding to 500 mL of the solvent

The solvent has a density of 0.87 g/mL.

500 mL × 0.87 g/mL = 435 g = 0.44 kg

Step 4: Calculate the molality of the solution

We will use the definition of molality.

m = moles of solute / kilograms of solvent

m = 0.026 mol / 0.44 kg = 0.059 m

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

For more such question on temperature visit:

https://brainly.com/question/4735135

#SPJ8

Answer:

The correct order for the stages of melting candle wax is:

Explanation:

Answer:

Venus

Explanation:

Mars has a thin atmosphere

Saturn is really cold (-288F)

Mercury has no atmosphere

Answer:

The HCl react strongly with NaA

Explanation:

The buffer is an aqueous mixture of a weak acid and its conjugate base, or vice versa.

In the problem, you have the weak acid, HA, in a mixture with the conjugate base, NaA. A strong acif as HCl is added. The acids react with bases, the only base present is NaA, that means:

The HCl react strongly with NaA

The reaction is:

HCl + NaA → NaCl + HA

As a result, the ideal gas law is applied, and the pressure of the gas in the container is 1.44 atm.

The Kelvin temperature and hence the volume are going to be in direct proportion when the pressure on a sample of a dry gas is held constant, according to the definition of the Charles Law Formula. PV = k is the law's equation, and k might be a constant.

This issue can be resolved by applying the ideal gas law:

PV = nR

T = -52 °C + 273.15 = 221.15 K

n = 0.642 mol

V = 8.6 L

T = 221.15 K

\(R = 0.0821 L·atm/mol·K (gas constant for ideal gases)\)

PV = nRT

P = nRT/V

P = (0.642 mol)(0.0821 L·atm/mol·K)(221.15 K)/(8.6 L)

P = 1.44 atm

To know more about ideal gas visit:-

https://brainly.com/question/28257995

#SPJ1

Answer: their amounts vary throughout the atmosphere

Explanation:

There is very little that travels over the atmosphere

Vary=very little

Answer:

Carbon dioxide and water vapor are variable gases because their amounts vary throughout the atmosphere.

Variable gases are not constant gases.  Constant gases have almost uniform concentrations through out the Earth's atmosphere.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

For more such questions on glucose visit:

https://brainly.com/question/397060

#SPJ8

As a result, the silver atomic radius in an FCC crystal lattice is roughly 1.44 angstroms.

There are 6 atoms in each unit cell of the hexagonal closest packed (HCP), which has a coordination number of 12. Four atoms make up each unit cell of the face-centered cubic (FCC), which has a coordination number of 12.

The following equation can be used to connect the silver crystal's density to its atomic radius (r) and molar mass (M):

density = (4 x M) / [(a)³ x Avogadro's number]

For FCC unit cells, the length of one edge (a) is related to the atomic radius (r) by the following equation: a = 2^(1/2) * r

Substituting this expression for a into the density equation and solving for r, we get:

r = [(3 x M) / (32 x density x pi)]^(1/3)

where pi is the mathematical constant, pi.

The molar mass of silver is approximately 107.87 g/mol.

Substituting the given values into the equation, we get:

r = [(3 x 107.87 g/mol) / (32 x 10.6 g/cm³ x pi)]^(1/3)

= 1.44 angstroms (rounded to two significant figures)

To know more about crystal lattice visit:-

https://brainly.com/question/10281663

#SPJ1

Answer:

The cell potential for the given galvanic cell is 0.188 V.

Explanation:

To calculate the cell potential, we can use the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

where E°cell is the standard cell potential, R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (25°C = 298 K), n is the number of moles of electrons transferred (in this case, n = 2), F is the Faraday constant (96,485 C/mol), and Q is the reaction quotient.

First, we need to write the half-reactions and their standard reduction potentials:

Sn4+(aq) + 2e- → Sn2+(aq) E°red = 0.15 V

Fe3+(aq) + e- → Fe2+(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn2+(aq) + 2Fe3+(aq) → Sn4+(aq) + 2Fe2+(aq)

The reaction quotient Q can be expressed as:

Q = [Sn4+][Fe2+]^2 / [Sn2+][Fe3+]^2

Substituting the given concentrations, we get:

Q = (0.00655)(0.01139)^2 / (0.0624)(0.0437)^2 = 0.209

Now we can calculate the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe2+]^2/[Fe3+]) + 0.0592 V log([Sn4+]/[Sn2+])

= 0.15 V + 0.0592 V log(0.01139^2/0.0437^2) + 0.0592 V log(0.00655/0.0624)

= 0.188 V

Therefore, the cell potential for the given galvanic cell is 0.188 V.

The cell potential for the given galvanic cell in which the given reaction occurs at 25 °C is 0.188 V.

To find the cell potential, we take the Nernst equation:

Ecell = E°cell - (RT/nF)ln(Q)

In which R is the gas constant (8.314 J/mol·K) and E° cell is the standard cell potential.

T temperature in Kelvin (25°C = 298 K), and n is the number of moles of electrons transferred (n = 2), Q is the reaction quotient and F is the Faraday constant (96,485 C/mol).

Firstly, write the half-reactions and then their standard reduction potentials:

Sn⁴⁺(aq) + 2e⁻  → Sn²⁺(aq) E°red = 0.15 V

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) E°red = 0.77 V

The overall reaction is the sum of the half-reactions:

Sn²⁺(aq) + 2Fe³⁺(aq) → Sn⁴⁺(aq) + 2Fe²⁺(aq)

The Q reaction quotient can be written as:

Q = [Sn⁴⁺][Fe²⁺]² ÷ [Sn²⁺][Fe²⁺]²

Substituting the given concentrations, we observe:

Q = (0.00655)(0.01139)² ÷ (0.0624)(0.0437)² = 0.209

Next, we can find the cell potential:

Ecell = 0.15 V + 0.0592 V log([Fe²⁺]²/[Fe³⁺]) + 0.0592 V log([Sn⁴⁺]/[Sn²⁺])

= 0.15 V + 0.0592 V log(0.01139²÷0.0437²) + 0.0592 V log(0.00655÷0.0624)

= 0.188 V

Thus, the cell potential for the given galvanic cell is 0.188 V.

Learn more about cell potential, here:

https://brainly.com/question/29719917

#SPJ2

Question

Suppose you are using distillation to separate cyclohexane and toluene. The boiling point of cyclohexane is _____, and the boiling point of toluene is ____

Answer:

The boiling point of cyclohexanol is 81°C and the boiling point of toluene is 111°C.

Explanation:

The boiling point of cyclohexanol is 81°C and the boiling point of toluene is 111°C.

Therefore, the liquid collected first should be​​​​​ cyclohexane. .

Cyclohexane is collected first in the distillation to separate cyclohexane and toluene.

In the distillation process the mixture of cyclohexane and toluene is heated therefore vapourizing the subtance. Under the boiling reflux, the vapour phase become richer in the low boilng component ,cyclohexane. The cyclohexane vapours continue to condense first as compare to high boiling component ,toluene. Hence, cyclohexane is collected first.

ΔTf=−0.634°C

Explanation:

We're asked to find the freezing point depression of a solution.

To do this, we use the equation

ΔTf= i⋅m⋅Kf

where,

ΔTf is the change in freezing point temperature that we're trying to find.

i  is the Van't Hoff factor, which is given as 1 (and usually is 1 in the case of nonelectrolytes)

m is the molality of the solution, which is

molality = mol solute /kg solvent

Convert the given mass of sucrose to moles using its molar mass:

35.0g sucrose(1lmol sucrose342.30g sucrose)=0.102 mol sucrose

The molality is thus

molality=0.120lmol sucrose/0.3000lkg water=0.341m

K f is the molal freezing point constant for the solvent (water), which is given as −1.86°C/m

Plugging in known values, we have

ΔTf=(1)(0.341m)(−1.86l°C/m)

=−0.634l°C

This represents how much the freezing point decreases. The new freezing point of the solution is found by adding this value from the normal freezing point of the solvent ( 0.0°Cfor water):

new f.p. = 0.0°C −0.634°C

= −0.6341°C

Learn more about The freezing point here:-https://brainly.com/question/24314907

#SPJ9

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

For such more question on polymerization

https://brainly.com/question/1602388

#SPJ8

A plant giving off oxygen during photosynthesis comes from water .

The plants takes up the carbon dioxide and the water and in the presence of sunlight  releases the oxygen as the by product in the process of the photosynthesis. in the process of the photosynthesis , the chlorophyll excited by the sunlight. in the presence of this the water undergoes the photolytic oxidation. this means that water is breaking down in to the hydrogen ion , electrons and the free oxygen. there are various experiments that shows that the source of oxygen is the water.

Thus, A plant giving off oxygen during photosynthesis comes from water .

To learn more about photosynthesis here

https://brainly.com/question/1388366

#SPJ1

Explanation:

The intermolecular forces present in the bonding of CH₃F are dipole-dipole interactions and London dispersion forces.

1.) No, CH₃F does not exhibit hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom such as fluorine, oxygen, or nitrogen. In CH₃F, the hydrogen atom is bonded to carbon, which is not highly electronegative.

2.) Yes, CH₃F exhibits dipole-dipole interactions. Dipole-dipole interactions occur between molecules that have permanent dipoles due to the electronegativity difference between the atoms. In CH₃F, the fluorine atom is more electronegative than the carbon and hydrogen atoms, resulting in a polar molecule with a permanent dipole moment.

3.) Yes, CH₃F exhibits London dispersion forces. London's dispersion forces, also known as Van der Waals forces, are present in all molecules and arise from temporary fluctuations in electron distribution. Although CH₃F has dipole-dipole interactions, it also experiences London dispersion forces due to the temporary shifts in electron density.

Hence, the bonding in CH₃F was explained above.

Learn more about intermolecular forces here:

https://brainly.com/question/31797315

#SPJ 6

My classmate's statement in incorrect because plants are also composed of cells.

All living things are composed of cells. A cell is the smallest unit of living organisms. Cells obtain energy via the process of cellular respiration. During cellular respiration, glucose is broken down to yield carbon dioxide and water.

In photosynthesis, carbon dioxide and water are combined to form glucose. The two processes are opposites of each other. Plants produce their own food via photosynthesis. Since plants are composed of cells, plant cells also undergo cellular respiration therefore my classmate's statement in incorrect.

Learn more: https://brainly.com/question/11324711

Answer:

spring tides is the correct answer of your question

Answer:2

Explanation:

Answer:

0.122 mg or 0.0122%

Explanation:

We first calculate average of ascorbic acid

= 7.8 + 8.6 /2

= 17.4/2

= 8.2

8.2 ml contains 0.03 x 8.2

= 0.246 mg of ascorbic acid.

1 ml of dcpip reacts with 0.246 ascorbic acid

1 mol of dcpip required 20.6 ml and 19.8

Average = 19.8 + 20.6 / 2

= 40.4/2

= 20.2ml

If 20.2 ml = 0.246 ascorbic acid

50 ml = 0.246 x 50 / 20.2

= 0.6089 mg is in 50 ml extract

5 mg of spinach is what was used to make extract

= 0.6089/5

= 0.122 mg

Vitamin c is made up of ascorbic acid as it's composition. So Vitamin c in spinach = 0.122 mg or 0.0122%

Answer:

4.33L

Explanation: