Intramolecular forces hold atoms together in a molecule. They are stronger than the intermolecular forces, which hold molecules close to each other in solids and liquids.

The heat of reaction for the decomposition of water in the liquid state is 285.8 kJ/mol. The molar heat of vaporization for water is 40.7 kJ/mol. In other words, seven times more energy is required to break up a mole of water molecules into hydrogen gas and oxygen gas than is required to convert a mole of liquid water to water vapor.

Obtain and Evaluate Information

SEP Construct an Explanation Use scientific reasoning to provide an explanation for the difference between the energy needed to split water molecules into hydrogen and oxygen gases and the energy needed to convert liquid water into vapor.

Answer:

Large leaves help plants to receive more sunlight when in tropical rainforests.

The word that best describes science in early childhood is "exploration." During this stage of development, children are naturally curious and eager to explore the world around them. Science in early childhood focuses on encouraging children to engage in hands-on activities, ask questions, make observations, and develop a sense of wonder about the natural world.

It provides opportunities for children to investigate, experiment, and discover through play-based learning, fostering their cognitive, social, and emotional development.

Science in early childhood is characterized by exploration. Young children have an innate sense of curiosity and a desire to understand how things work. They are constantly observing their environment, asking questions, and seeking answers. Science education in early childhood capitalizes on this natural curiosity by providing children with opportunities to explore and investigate their surroundings.

Through hands-on activities and play-based learning, children engage in sensory experiences, experiments, and problem-solving tasks. They explore various materials, observe changes, and make connections between cause and effect. These experiences promote critical thinking skills, as well as the development of language, communication, and cognitive abilities.

Science in early childhood also nurtures children's social and emotional development. It encourages collaboration, communication, and sharing of ideas with peers. Children learn to work together, negotiate, and build relationships as they engage in scientific exploration.

To learn more about Cognitive abilities - brainly.com/question/28541749

#SPJ11

Answer:

This is a artesian well they are able to bring up water with out requiring a pump. This happens when there is enough pressure in the aquifer to push the water up to the surface.

Explanation:

The compounds NH4F, AgNO3, and MgSO4 are anticipated to be soluble in water. It is anticipated that AgCl won't dissolve in water.

We need to take into account the solubility laws for common ionic compounds in order to predict which compounds would be soluble in water.

Ammonium fluoride, or NH4F, is a substance that dissolves in water. The majority of ammonium (NH4+) salts, including NH4F, are soluble.

Silver chloride (AgCl) cannot be dissolved in water. Silver chloride is an exception to the rule that most metals' chlorides (Cl-) are soluble.

AgNO3: Water is soluble in silver nitrate (AgNO3). The majority of nitrates (NO3-), including silver nitrate, are soluble.

Magnesium sulphate (MgSO4) is water soluble. Most metal sulphates (SO4-) are soluble, including the sulphate of magnesium.

NH4F, AgNO3, and MgSO4 are examples of soluble substances according to the solubility laws.

AgCl is an insoluble substance.

According to the solubility principles for typical ionic compounds, NH4F, AgNO3, and MgSO4 should all be soluble in water. Contrarily, AgCl is not soluble in water. By taking into account the solubility regulations for each of their individual ions, it is possible to establish these compounds' solubility.

For more such question on compounds. visit :

https://brainly.com/question/14782984

#SPJ8

Answer:

Explanation:

Start by writing water as HOH

Ca(OH)2 +CO2 = CaCO3+ HOH

Next pay attention to the CO2 going to CO3

We need an oxygen.

Fortunately that is provided by the (OH)2

Now we have

Ca(OH)2 + CO2 ==> CaCO3 + HOH

and believe it or not, that is balanced as it is

The left side has 1 Ca. So does the right side

The Left side has 1 C.  So does the right side.

The left side has 2 H. So does the right side

The left side has 2 oxygens (in Ca(OH2)) + 2 oxygens in CO2

So the equation is balanced.

The mass number is the atomic mass rounded to a whole number.

The mass number, can be regarded as the atomic mass number or nucleon number, which can be seen as the total number of protons  as well as neutrons in an atomic nucleus however if it is  approximated , it can be considered to be equal to the atomic mass of the atom expressed in atomic mass units.

It should be noted that the mass number is established by rounding the atomic weight to the nearest whole number.

Learn more about mass number at:

https://brainly.com/question/12184564

#SPJ1

Answer:

2 Cu2S + 3 O2 = 2 Cu2O + 2 SO2

Explanation:

2 Cu2S + 3 O2 = 2 Cu2O + 2 SO2

Answer:

2 and 3 only

Explanation:

The formular for the compound; Silicon(IV)oxide is SO2

1. Silicon atoms form four single bonds in silicon(IV) oxide.

This statement is wrong because the silicon is doubly bonded to two oxygen atoms.

2. Oxygen atoms form two double bonds in silicon(IV) oxide.

This statement is correct.

3. Silicon(IV) oxide has a high melting point.

This statement is correct Due to it's macromolecular structure, it is able to form thousands of covalent bonds between it's sulphur and oxygen sub units.

4. Silicon(IV) oxide contains one silicon atom and four oxygen atoms.

This statement is wrong as silicon(iv) oxide contains only two oxygen atoms.

Explanation:

A is the answers for the question

The product formed in the combustion reaction is generally the oxidized fuel. The combustion reactions are exothermic. The products of the given reaction are CO₂ and H₂O. The correct option is D.

A  chemical reaction in which the fuel undergoes oxidation by reacting with a powerful oxidizing agent which results in the release of energy generally in the form of heat is defined as the combustion. All combustion reaction will not results in fires.

The combustion of LPG fuel which is used for cooking food involves the combustion reaction between the oxygen present in the atmosphere and the liquified petroleum gas. The explosion of fire works also indicates the combustion reaction.

The given reaction is given as:

CH₂(g) + O₂(g) → CO₂(g) + H₂O(g)

The substances on the right-hand side are called the products.

Thus the correct option is D.

To know more about combustion, visit;

https://brainly.com/question/14335621

#SPJ5

Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

Learn more about logarithm here :-

https://brainly.com/question/30226560

#SPJ11

Answer:1. One is warm, the other cold

2. the cold one is smaller

Explanation: V/T is constant

if temperature decreases, volume decreases and vice versa

According to the concept of thermal energy, the balloon kept in refrigerator  has less volume while that is heated has more volume.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.

Learn more about thermal energy,here:

https://brainly.com/question/11278589

#SPJ2

Answer:

Assuming excess zinc, 2.33 moles of hydrochloric acid would produce 645.13 grams of zinc chloride.

The balanced chemical equation for the reaction between hydrochloric acid and zinc is: Zn + 2HCl → ZnCl2 + H2.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and zinc (Zn) is:

Zn + 2HCl → ZnCl2 + H2

This equation tells us that 1 mole of zinc reacts with 2 moles of hydrochloric acid to produce 1 mole of zinc chloride and 1 mole of hydrogen gas. Therefore, to determine how much zinc chloride is produced when 2.33 moles of hydrochloric acid reacts completely, we need to use stoichiometry.

First, we need to determine how many moles of zinc chloride would be produced from 2.33 moles of hydrochloric acid. From the balanced equation, we know that the ratio of hydrochloric acid to zinc chloride is 2:1. Therefore, the number of moles of zinc chloride produced would be half the number of moles of hydrochloric acid used:

2.33 moles HCl x (1 mole ZnCl2 / 2 moles HCl) = 1.165 moles ZnCl2

Next, we need to convert moles of zinc chloride to grams. The molar mass of zinc chloride is the sum of the atomic masses of one zinc atom and two chlorine atoms:

1 zinc atom x 65.38 g/mol = 65.38 g/mol Zn

2 chlorine atoms x 35.45 g/mol = 70.90 g/mol Cl

Total molar mass = 65.38 g/mol + 70.90 g/mol = 136.28 g/mol ZnCl2

Now we can use this molar mass to convert moles of zinc chloride to grams:

1.165 moles ZnCl2 x 136.28 g/mol ZnCl2 = 158.3 grams ZnCl2

Therefore, 2.33 moles of hydrochloric acid reacting completely would produce 158.3 grams of zinc chloride.

Learn more about zinc chloride here:

https://brainly.com/question/26385253

#SPJ1

Answer:true

Explanation:

Answer:

Vibrate?

Explanation:

In a solid the strong attractions between the particles hold them tightly packed together. Even though they are vibrating this is not enough to disrupt the structure. When a solid is heated the particles gain energy and start to vibrate faster and faster.

Answer:

C

Explanation:

d=300

t=6hr

speed=?

speed=300/6

speed=50m/hr the important thing in this question is to get the right units

If the concentration of nitrosyl bromide in Calculation 4 was doubled, the rate of the reaction would also double. The rate constant would not change.

The rate of a reaction is the amount of reactants consumed or products produced per unit of time. The rate of reaction can be determined by monitoring the disappearance of the reactant, the appearance of the product, or the change in the concentration of the reactant or product over time. The rate law for a chemical reaction is a mathematical formula that relates the rate of the reaction to the concentration of the reactants, and possibly the temperature and pressure.

The order of reaction is the exponent to which the concentration of a reactant is raised in the rate law equation. The rate constant, k, is a constant of proportionality that relates the rate of a reaction to the concentrations of the reactants raised to their respective order in the rate law equation. The rate constant is a temperature-dependent quantity that does not change with changes in the concentrations of the reactants.

For more question on nitrosyl bromide click on

https://brainly.com/question/13620895

#SPJ11

The force between the two charges is approximately -1.17 N.The Coulomb's Law of Electrostatics states that the magnitude of the force F between two point charges can be found by

F=kq1q2/r^2, where k is the constant of proportionality that equals to 9 × 10^9 Nm^2/C^2, q1 and q2 are the magnitudes of the charges in coulombs and r is the distance between the charges in meters.

Let q1= -2.0 ✕ 10-4 C, q2

=6.0 ✕ 10-4 C,

and r=0.34 m.

Then, the force F between the two charges can be calculated as follows:

F=kq1q2/r^2

= 9 × 10^9 Nm^2/C^2 × (-2.0 ✕ 10-4 C) × (6.0 ✕ 10-4 C) / (0.34 m)^2

≈ -1.17 N

(Note that the negative sign indicates the force is attractive between unlike charges.)

Therefore, the force between the two charges is approximately -1.17 N.

To know more about Electrostatics  visit :

https://brainly.com/question/16489391

#SPJ11

Answer:

its  Hypothalamus

Explanation:

Answer:

For d I'm pretty sure its Organ System, I apologies if I am wrong

The cell membrane which is more fat permeable will be present at the end of the process.

Solvent extraction is a very important method if separating mixtures. The principle of solvent extraction is based on the idea of like dissolves like. A substance dissolves in the component of the system in which it is most soluble.

If a cell extract is dissolved in a nonpolar solvent, the cell membrane which is mostly permeable to nonpolar molecules will dissolve most in the solvent.

Learn more:https://brainly.com/question/14396802

Answer:

A. chlorophyll

Explanation:

Plants use chlorophyll the most & I took the test.

The molecular basis for the correlation between disulfide bond content and mechanical properties of the protein comparison of a-keratin and glutenin is the presence and amount of disulfide bonds in these proteins.

The presence and amount of disulfide bonds in these proteins directly correlate with their mechanical properties. The more disulfide bonds present, the stronger and more stable the protein will be. This is why keratin and glutenin, both with high disulfide bond content, have strong mechanical properties. In contrast, proteins with low disulfide bond content, such as silk, have weaker mechanical properties.

learn about disulfide bond and their relation with protein structure

https://brainly.com/question/14446616

#SPJ11