when moderately compressed, gas molecules have _______ attraction for one another.

Answer:

D a golf ball

Explanation:

I did this test and I put golf ball and it was right

Answer:

It is D I did the test  hope this helps!!!

Explanation:

A P E X

Neutrons do not carry an electrical charge so adding or removing them from the nucleus does not change the electrical charge of the nucleus.

So your answer is true

Answer:

As you move down a group, a couple of things happen:

Atomic Number, Metallic Properties, Atomic Radius, Radioactive Isotopes INCREASE

Electronegativity, Ionizaition Energy, Electron Affinity, Nonmetallic Properties DECREASE

Explanation:

By considering the composition of a water molecule, we can determine the total number of hydrogen and oxygen atoms present in this quantity of water molecules. Hence, in 6.02 x 10^23 water molecules, there are approximately 1.204 x 10^24 hydrogen atoms and 6.02 x 10^23 oxygen atoms.

A water molecule consists of two hydrogen atoms and one oxygen atom. Therefore, in 10 water molecules, there would be a total of 20 hydrogen atoms (2 x 10) and 10 oxygen atoms (1 x 10). To find the total number of hydrogen and oxygen atoms in 6.02 x 10^23 water molecules, we can multiply this quantity by the respective number of atoms in each molecule.

Calculating the total number of hydrogen atoms:

2 x 6.02 x 10^23 = 12.04 x 10^23 ≈ 1.204 x 10^24 (using scientific notation)

Calculating the total number of oxygen atoms:

1 x 6.02 x 10^23 = 6.02 x 10^23

Hence, in 6.02 x 10^23 water molecules, there are approximately 1.204 x 10^24 hydrogen atoms and 6.02 x 10^23 oxygen atoms.

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Answer:

Francium (Fr), heaviest chemical element of Group 1 (Ia) in the periodic table, the alkali metal group. It exists only in short-lived radioactive forms.

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Francium  belongs to alkali metals group.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Francium is a radioactive element, the electronic configuration of Francium is [ R n] 7s¹. The number of electron in outermost shell s is 1. This shows that francium belongs to group 1 of periodic table that is alkali metals.

Therefore, Francium  belongs to alkali metals group.

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Answer:g

Explanation:g

The section many chemical and pysical changes are Happening In nature relate to section "matter Isn't lost In photosynthesis" by the fact that,It provides another example of how matter is conserved within ecosystems.

Similar to the law of conservation of energy, the total mass of a system is conserved. Mass can neither be created nor be destroyed. However, the mass of a system can be transferred to another system or can be converted as heat energy.

Photosynthesis is the process of synthesizing chemical energy in green plants using light energy. The reaction involves the combination of carbon dioxide and water to form glucose and oxygen gas.

In this reaction, the total mass of the reactants is exactly equal to the total mass of the products. Hence, the mass is conserved. This is the case for all balanced chemical reactions and physical changes. Hence, option A is correct.

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In the chemical reaction the reactants are oxygen and ethanolc acid while the product are water and carbon dioxide.

In a chemical reaction, reactants are the substances that react with each other to form products.

Therefore, oxygen and ethanoic acid are reactants while carbon dioxide and water are products.In a combustion reaction, a substance is burned in the presence of oxygen, resulting in the release of heat and light.

During this reaction, the oxygen reacts with the substance to produce carbon dioxide and water. In the given reaction, ethanoic acid (CH3COOH) is burned in the presence of oxygen (O2), producing carbon dioxide (CO2) and water (H2O).

Thus, oxygen and ethanoic acid are reactants, while carbon dioxide and water are products.

The combustion reaction of ethanoic acid is shown as follows:

2CH3COOH + 3O2 = 2CO2 + 2H2O + heat and light

This means that for every two molecules of ethanoic acid and three molecules of oxygen that react, two molecules of carbon dioxide and two molecules of water are produced. The heat and light produced are also released.

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Answer:

d)Gas syringe and stopclock

Explanation:

Gas syringe is used to measure the volume of gas collected

Stopclock is used to measure the time taken to produce a certain amount of gas thus the rate of reaction:volume vs time can be determined

No because it's travelling at a constant velocity in both scenarios and there's no particular direction in which the rate of change of velocity is changing.

Answer:

How many parts of the body are mentioned in the poem ? make a list of them.

Answer:

1) 1.6 moles of HCl

Explanation:

1) 1.6 moles of HCl

2) 7.0 moles of HCl

3) 2.4 moles of hydrogen

4) 0.96 moles of HCl

Explanation:

The balanced chemical equation is:

According to stoichiometry :

1 mole of  require = 2 moles of  

0.8 moles of  will require=  of  

3.5 moles of  will require=  of  

According to stoichiometry :

2 moles of  produce = 1 mole of  

4.8 moles of  will require=  of  

According to stoichiometry :

1 mole of  are produced by = 2 moles of  

0.48 moles of  are produced by =  of

To predict whether creatine kinase will operate in the direction of ATP synthesis or phosphocreatine synthesis, we need to consider the equilibrium constant for the reaction and the concentrations of the reactants and products.

The reaction catalyzed by creatine kinase is:

ATP + creatine <-> ADP + phosphocreatine

The equilibrium constant for this reaction is defined as:

Kc = [ADP][phosphocreatine] / [ATP][creatine]

We are given the concentrations of the reactants and products at 25°C:

[ATP] = 4 mM

[ADP] = 0.15 mM

[phosphocreatine] = 2.5 mM

[creatine] = 1 mM

We can use these concentrations to calculate the value of the equilibrium constant:

Kc = [ADP][phosphocreatine] / [ATP][creatine] = (0.15 mM)(2.5 mM) / (4 mM)(1 mM)

Kc = 0.09375

If the value of the equilibrium constant is less than 1, the reaction will favour the reactants, meaning it will operate in the direction of ATP synthesis. If the value of the equilibrium constant is greater than 1, the reaction will favour the products, meaning it will operate in the direction of phosphocreatine synthesis.

Since the value of the equilibrium constant is less than 1, the reaction will favour the reactants, meaning that creatine kinase will operate in the direction of ATP synthesis.

In summary, the reaction catalyzed by creatine kinase at 25°C when, [ATP] = 4 mM, [ADP] = 0.15 mM, [phosphocreatine] = 2.5 mM and [creatine] = 1 mM will operate in the direction of ATP synthesis.

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The magnitude of the force acting on the body is 4000 Newtons.

To find the magnitude of the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the product of its mass and acceleration.

The given information includes the mass of the body (80 kg) and the resulting velocity (10 m/s). However, since the time duration (0.2 seconds) is also provided, we can use it to calculate the acceleration of the body.

The formula to calculate acceleration is:

Acceleration = Change in Velocity / Time

The change in velocity can be calculated by subtracting the initial velocity (which is 0 m/s as the body is at rest) from the final velocity:

Change in Velocity = Final Velocity - Initial Velocity

Change in Velocity = 10 m/s - 0 m/s

Change in Velocity = 10 m/s

Now, we can calculate the acceleration:

Acceleration = Change in Velocity / Time

Acceleration = 10 m/s / 0.2 s

Acceleration = 50 m/s²

Finally, we can calculate the magnitude of the force using Newton's second law:

Force = Mass x Acceleration

Force = 80 kg x 50 m/s²

Force = 4000 N

Therefore, the magnitude of the force acting on the body is 4000 Newtons.

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Answer:

water would allow sound to travel the fastest due to its higher density and elasticity compared to air, which makes it a better medium for transmitting sound waves.

Explanation: Answer is in explanation

Sound travels fastest in solids, and specifically in materials that are elastic, dense, and have strong intermolecular forces between their particles. Among the options given, glass is a solid, but it is not very elastic or dense, so it is not the best material for sound to travel through quickly. Lead is a dense material, but it is also very heavy and not very elastic, so it is not the best either.

Air is a gas, and gases are not very dense or elastic, so sound travels relatively slowly through them. The speed of sound in air is about 343 meters per second at standard temperature and pressure.

Water is a liquid, but it is much denser and more elastic than air, so sound travels about four times faster in water than in air, at around 1,484 meters per second.

Therefore, among the given options, water would allow sound to travel the fastest due to its higher density and elasticity compared to air, which makes it a better medium for transmitting sound waves.

Answer:

b

Explanation:

Answer: B. The object moves with a constant positive velocity and then stops moving. The slope represents velocity.

Explanation: the object increases its position and moves with a constant velocity because the slope of the graph is constant and positive.

The correct answer is a) Henry's Law. This law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas in the overlying space.

This means that as the partial pressure of the gas increases, more gas molecules will dissolve in the liquid. Henry's Law is important in many areas of science, including chemistry, environmental science, and biology.

For example, it is used to understand the behavior of gases in the atmosphere and their impact on climate change, as well as the ability of aquatic organisms to obtain oxygen from water.

Henry's Law can also be applied to industrial processes such as gas purification and carbonation of beverages.

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If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.

According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.

When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.

For the dominant allele, however, only one copy is needed for it to be expressed.

In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.

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Answer:

D. 6.02 x 1023

Explanation:

did the test !!

6.022×10²³ atoms are in one mole of potassium. Therefore, the correct option is option D.

In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, and other predetermined particles. The mole designates 6.022×10²³ units, which is a very large number. For the Worldwide System of Units (SI), the mole is defined as this number as of May 20, 2019, according to the General Meeting on Measurement and Weights.

The quantity of atoms discovered through experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole. The total quantity of atoms discovered through experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole. 6.022×10²³ atoms are in one mole of potassium.

Therefore, the correct option is option D.

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Answer:

C - raising the temperature of a gas

Explanation:

as you raise temperature, kinetic energy rises, and so does pressure

Answer:

C.

raising the temperature of the gas

Explanation:

Edg. 2020

Other guy is right i got 100%

Answer:

a) Failure

b) Structural stress

c) Fatigue

Explanation:

Cations have more protons than electrons, Anions result when atoms gain an electron.

The electron, a subatomic particle, has a negative one elementary charge electric charge. The electron, a member of the first generation of the lepton particle family, is usually regarded as an elementary particle because it has no known components or substructure.

A few straightforward rules can be used to calculate the quantity of protons, neutrons, and electrons present in an atom. The atomic number and the number of protons in the atom's nucleus are equal (Z). A neutral atom has the same number of protons and electrons as protons.

Around the nucleus, electrons are positioned in several shells. Only a fixed amount of electrons can fit in each subsequent shell. Filling begins with the innermost shell.

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The change described in the process of reconstituting frozen orange juice is a physical change. A physical change refers to a transformation that affects one or more physical properties of a substance, such as its size, shape, or state, without altering its chemical composition.

Adding water to frozen orange juice to reconstitute it causes a change in its volume, but it does not create new substances or cause a chemical reaction. Therefore, it is considered a physical change. Other examples of physical changes include cutting an apple, melting ice, and boiling water.

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The pH of 7.67 in the patient's blood, which is more basic than the normal range, suggests a potential health concern and warrants further evaluation.

There is cause for concern. A pH of 7.67 indicates that the blood is more basic than the normal range for human blood, which suggests a higher hydroxide ion concentration. While the given pH value does not provide the exact hydroxide ion concentration, it is clear that the patient's blood pH is outside the normal range. This abnormal pH level can be indicative of an underlying health issue, especially in the case of diabetics who are known to experience fluctuations in blood pH due to metabolic imbalances.

A pH level outside the normal range may indicate a condition called metabolic alkalosis, which can be caused by various factors such as excessive vomiting, certain medications, or underlying health conditions. It is important for the patient to consult a healthcare professional to determine the cause of the abnormal pH and to assess their overall health. Regular monitoring and proper management of blood pH levels are crucial for maintaining homeostasis and ensuring optimal health.

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Answer:

MgO

Explanation:

Answer:

strength, ductility, hardness, impact resistance, and fracture toughness.

Answer:

The most common mechanical properties are yield stress, elongation, hardness, and toughness.

Explanation:

At STP, when 14.5 mL of a 2.08 M HCl solution reacts with excess \(CaCO_3\), approximately 0.22 liters of \(CO_2\) gas can form.

1. Determine the moles of HCl used:

  Given the volume of HCl solution is 14.5 mL and its concentration is 2.08 M.

  Moles of HCl = volume (in liters) × concentration

                = 14.5 mL × (1 L / 1000 mL) × 2.08 M

                = 0.03016 moles

2. Use the balanced chemical equation to find the moles of \(CO_2\) produced:

  The balanced equation for the reaction between HCl and \(CaCO_3\) is:

  2 HCl + \(CaCO_3\) → CaCl2 + \(CO_2\) + \(H_2O\)

  According to the equation, 2 moles of HCl produce 1 mole of \(CO_2\).

  Therefore, moles of \(CO_2\) = 0.03016 moles × (1 mole \(CO_2\) / 2 moles HCl)

                      = 0.01508 moles

3. Convert moles of \(CO_2\) to liters at STP:

  At STP (standard temperature and pressure), 1 mole of any gas occupies 22.4 liters.

  Therefore, liters of \(CO_2\) = 0.01508 moles × 22.4 L/mole

                         ≈ 0.337792 liters

4. Round the answer to an appropriate number of significant figures:

  Since the initial volume of HCl solution was given with three significant figures (14.5 mL), the answer should also be expressed with three significant figures.

  Hence, the approximate volume of \(CO_2\) gas formed at STP is 0.338 liters or 0.22 liters (rounded to three significant figures).

Therefore, approximately 0.22 liters of \(CO_2\) gas can form at STP when 14.5 mL of a 2.08 M HCl solution reacts with excess \(CaCO_3\).

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Explanation:

Here is a step-by-step method for conducting an investigation on the effect of surface area on the rate of reaction between calcium carbonate and hydrochloric acid:

Materials:

Calcium carbonate tablets (quikeze)

Hydrochloric acid solution (0.5M)

Stopwatch

Safety goggles

Measuring cylinder

Beaker

Spatula

Mortar and pestle

Procedure:

Put on safety goggles.

Measure 50 mL of 0.5 M hydrochloric acid solution using a measuring cylinder and pour it into a beaker.

Crush the calcium carbonate tablet into three different sizes (whole tablet, 1/2 tablet, and 1/4 tablet) using a mortar and pestle.

Use a spatula to transfer the different sizes of calcium carbonate tablets into separate beakers.

Start the stopwatch.

Pour the hydrochloric acid solution into each beaker containing the different sizes of calcium carbonate tablets simultaneously.

Observe and record the time it takes for the reaction to finish in each beaker, i.e., when the fizzing stops.

Repeat the experiment two more times to get more accurate results.

Record the data in a table.

Calculate the average time it takes for the reaction to finish for each different size of calcium carbonate tablet.

Plot a graph of the average time taken for the reaction against the surface area of the calcium carbonate tablets.

Analyze the data and draw a conclusion regarding the effect of surface area on the rate of reaction between calcium carbonate and hydrochloric acid.

Tips for accuracy and safety:

Use the same volume of hydrochloric acid solution in each experiment.

Make sure to crush the different sizes of calcium carbonate tablets into as equal pieces as possible.

Repeat the experiment multiple times to reduce any errors in measurement.

Always wear safety goggles to protect your eyes from the hydrochloric acid solution.

Dispose of the leftover chemicals properly according to your lab's regulations.