Can someone help me on this please

Solid, Liquid, and Gas

Solid is the state in which matter maintains a fixed volume and shape; liquid is the state in which matter adapts to the shape of its container but varies only slightly in volume; and gas is the state in which matter expands to occupy the volume and shape of its container.

The states of matter are solid, liquid, and gas. Solid is the state in which matter maintains a fixed volume and shape; liquid is the state in which matter adjusts to the shape of its container but tends to vary only mildly in volume; and gas is the state in which matter expands to occupy the volume and shape of its container.

Matter would be any substance with mass and volume that occupies space.

Matter exists in three states: solid, liquid, and gas. The states of matter are solid, liquid, and gas.

Thus, above-mentioned are the three states of matter.

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Answer: emulsion

Explanation: wheres the answers

The electrical charge of the atom is zero. This is because the number of protons, which carry a positive charge, is equal to the number of electrons, which carry a negative charge. The neutrons, which carry no charge, do not contribute to the electrical charge of the atom. Therefore, the atom has a neutral charge overall.

An atom has three types of subatomic particles: protons, neutrons, and electrons. Protons have a positive electrical charge (+1), electrons have a negative electrical charge (-1), and neutrons have no electrical charge (0).
In your atom, there are:
- 5 protons, each with a charge of +1
- 6 neutrons, each with a charge of 0
- 5 electrons, each with a charge of -1
To find the total electrical charge of the atom, you can add the charges of all the subatomic particles together:
(5 protons × +1 charge/proton) + (6 neutrons × 0 charge/neutron) + (5 electrons × -1 charge/electron) = 5 + 0 - 5 = 0
The total electrical charge of this atom is 0. This means the atom is neutral, as the number of positive charges (protons) equals the number of negative charges (electrons).

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Scientists generally assume that a thick tree ring indicates that the temperature was warm and the precipitation was plentiful during the growing season. Option 2 is the answer.

Precipitation refers to any form of water that falls from the atmosphere and reaches the ground, such as rain, snow, sleet, or hail. It is a crucial part of the water cycle and is essential for the growth of plants and animals, as well as for human activities such as agriculture and hydroelectric power generation.

Temperature has a significant impact on precipitation patterns. Warm temperatures tend to increase the rate of evaporation, which can lead to more water vapor in the air and potentially more precipitation. In some cases, higher temperatures can also lead to more intense storms and rainfall events, such as during tropical cyclones or thunderstorms.

Scientists generally assume that a thick tree ring indicates that the temperature was warm and the precipitation was plentiful during the growing season. This is because warm temperatures and abundant moisture tend to promote more robust growth in trees, resulting in wider rings. Conversely, cold temperatures and a lack of precipitation can lead to stunted growth and thinner rings. Therefore, a thick ring is often seen as a positive indication of favorable growing conditions.

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PI2 ≈ 7.4 torrPI2 ≈ 7.4 torrs because it is directly proportional to the initial pressure of HIHI.

At equilibrium, the forward and reverse reactions occur at the same rate. Once equilibrium is reached, the amounts of each reactant and product remain constant. The equilibrium constant equation is a mathematical relationship that describes how the concentrations of products vary with the concentrations of reactants.

The state of a system whose properties are fixed under unvarying external conditions is called the equilibrium state. Chemical equilibria are dynamic in nature because reactants turn into products and products turn into reactants even after equilibrium is reached. However, the speed of forward and backward reactions is the same. Examples of balance include A book placed on the table. A car that moves at a constant speed. A chemical reaction in which the forward and reverse reaction rates are equal.

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Answer:

Solid is one of the three common states of matter. The molecules in solids are closely bound together, they can only vibrate. This means solids have a definite shape that only changes when a force is applied. This is different to liquids and gases which move randomly, a process called flow.

The pH of the solution is calculated by taking the weighted average of the pH values from HCl and picric acid, considering their concentrations. The resulting pH is approximately 1.85.

To calculate the pH of the solution, we need to consider the dissociation of both acids, HCl and picric acid (C₆H₂(NO₂)₃OH), in water. HCl is a strong acid and dissociates completely, while picric acid is a weak acid and only partially dissociates.

Calculate the concentration of H+ ions from HCl:

Since HCl is a strong acid, it completely dissociates in water, yielding H+ ions and Cl- ions. Therefore, the concentration of H+ ions is equal to the concentration of HCl, which is 0.01 M.

Step 2: Calculate the concentration of H+ ions from picric acid:

Picric acid is a weak acid, and its dissociation can be represented by the equilibrium reaction:

(C₆H₂(NO₂)₃OH) (aq) ⇌ (C₆H₂(NO₂)₃O- (aq) + H+ (aq)

The equilibrium constant (Ka) for this reaction is given as 0.43. Let's assume that x is the concentration of H+ ions formed from the dissociation of picric acid. Since the concentration of picric acid is 0.02 M, the concentration of H+ ions is also x.

Applying the equilibrium expression for Ka, we have:

Ka = [(C₆H₂(NO₂)₃O][H+] / [(C₆H₂(NO₂)₃OH]

Since the dissociation of picric acid is much smaller compared to the initial concentration, we can assume that the change in concentration of picric acid is negligible. Therefore, we can approximate the concentration of picric acid as its initial concentration, which is 0.02 M.

Substituting the known values into the equilibrium expression, we get:

0.43 = (x)(x) / 0.02

Simplifying the equation, we find:

x ²= 0.02 * 0.43

x ² = 0.0086

x ≈ 0.093 M

Thus, the concentration of H+ ions from picric acid is approximately 0.093 M.

Calculate the pH of the solution:

The pH of a solution can be calculated using the formula:

pH = -log[H+]

For the HCl component, the concentration of H+ ions is 0.01 M. Taking the negative logarithm, we find:

pH(HCl) ≈ -log(0.01) ≈ 2

For the picric acid component, the concentration of H+ ions is 0.093 M. Taking the negative logarithm, we find:

pH(picric acid) ≈ -log(0.093) ≈ 1.03

To obtain the overall pH of the solution, we can use the weighted average of the pH values from both components. Since the concentration of HCl is half that of picric acid, we give it half the weight:

pH(solution) ≈ (0.5 * pH(HCl)) + (0.5 * pH(picric acid))

           ≈ (0.5 * 2) + (0.5 * 1.03)

           ≈ 1.85

Therefore, the pH of the solution is approximately 1.85.

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Explanation:

The periodic table brings order to information about the chemical elements. It helps chemists to understand why elements react as they do. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency

When the order of the reaction increases the half-life of the reaction decreases. This is because the rate constant k becomes smaller as the order of the reaction increases, and the half-life is inversely proportional to k.

The given chemical reaction:

H₂(g) + I₂(g) → 2HI(g)

Is a second-order reaction, as the overall order of the reaction is 2 (sum of the orders of the reactants). The rate law for this reaction will be:

Rate = k[H₂][I₂]

where k is the rate constant, [H₂] and [I₂] are the concentrations of hydrogen and iodine gases, respectively.

The half-life of a second-order reaction is given by the equation:

\(t_{1/2}\) = 1 / k[A]0

where [A]₀ is the initial concentration of one of the reactants. In this case, we can take either [H₂]₀ or [I₂]₀ as the initial concentration.

Now, increasing the order of the reaction means changing the rate law by increasing the exponent of the concentration term. For example, if the reaction becomes third-order, the rate law would be:

Rate = k[H₂]²[I₂]

If the reaction becomes higher order, the rate law would be even more complex.

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Answer:

Methane -1,Ethene 2 , Ethane 2,Pentane 5,Propene 3,Hexane 6,Ethyne 2,Propane 3,Octane 8,Heptane 7 Decane 10,Butyne 4,Butane 4,Propyne 3,Butene 4

Answer:

Methane: 1

Ethane: 2

Ethene: 2

Pentane: 5

Propene: 3

Hexane: 6

Ethyne: 2

Propane: 3

Hexane: 7

Octane: 8

Decane: 10

Butyne: 4

Butane: 4

Propyne: 3

Butene: 4

Explanation:

Use the chemical formula of the compounds:

Methane ⇒ \(CO_4\)             Hexane ⇒ \(C_6H_14\)        Decane ⇒  \(C_10H_22\)

Ethane ⇒ \(C_2H_6\)                Ethyne ⇒ \(C_2H_2\)          Butyne ⇒ \(C_4H_6\)

Ethene ⇒ \(C_2H_4\)             Propane ⇒ \(C_3H_8\)         Butane ⇒ \(C_4H_10\)

Pentane ⇒ \(C_5H_12\)             Hexane ⇒ \(C_7H_16\)      Propyne ⇒ \(C_3H_4\)

Propene ⇒ \(C_3H_6\)           Octane ⇒ \(C_8H_18\)            Butene ⇒ \(C_4H_8\)

In the chemical formulas above, each formula has things known as coefficients (elements) and subscripts (atoms).

So to further explain, take methane as an example, there is a "C" at the beginning. C is capital as it is a pure substance and is a element. This also means there is 1 carbon atom in methane while there is 4 oxygen atoms. But to explain further, let's review definitions:

A pure substance composed of two or more elements composed of two or more elements.

A pure substance is a single element or compound, not mixed with any other substance

One of a class of substances that cannot be separated into simpler substances by chemical means.

A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

So after reviewing let's find the carbon atoms.

The subscripts in each chemical formula that are to the right to the "C" are the amount of carbon atoms. If a capital letter does not have a subscript, it is assumed to have 1 atom only.

Your answers can be found above.

Answer: It is B

Explanation:

EAZYYYY

1) We know that rtp = number of moles × 24

                                 = 0.25 × 24

                                 = 6 dm³

Therefore the volume of 0.25 moles of gas at rtp is A) 6 dm³

3.1) Amount of Copper = 20 tonnes

Amount of pure copper from impure copper = 18 tonnes

Purity of copper = (Pure copper/ impure copper) × 100

                           = (18 / 20) × 100

                           = 18 × 5

                           = 90 %

Therefore the purity of copper is 90%

3.2) We know that oxygen has 8 protons and 8 neutrons, so the weight of oxygen molecule is 8 + 8 = 16 u

So, one mole of oxygen weighs 16 g, so 2 moles weigh 2 × 16 = 32 grams

But oxygen is diatomic so the weight is 32 × 2 = 64 grams

Therefore the weight of 2 moles of oxygen is 64 grams

3.3) Concentration of solution = Amount of solute/volume

                                                   = 4 moles/ 2 dm³

                                                   = 4 / 2

                                                   = 2 mol/dm³

Therefore the concentration of a solution containing 4 moles in 2 dm³ of solution is 2 mol/dm³

Happy to help :)

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Extremely sorry for the late answer

I am going to use first-person pronouns for this drop of water

[ Start ] Liquid

     I start out as a drop of water among other drops of water in the ocean. I am currently a liquid as I can change shape easily but I do not float up.

[ Middle ] Gas

     The sun feels very hot. From the heat I turn into a gas, specifically water vapor, and float up into the sky.

[ Middle x 2 ] Solid

     In the sky I meet up with a lot of my past friends. We form a cloud, and as we grow heavier (the more the merrier) we start to fall down. It is extremely cold now, so we fall down as a solid, also known as hail or snow.

[ End ] Liquid

     We hit the ocean again as we fall from the sky. I'm so happy to be back home as a water drop again!

Have a nice day! - Please note this is very simplified

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

Answer:

Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react. ... The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties.

Explanation:

I hope this helps

have a great day:)

good luck!

Carbon dioxide,Ammonia,Oxygen,Water,Hydrogen fluoride,Nitrogen are the polarity of 6 real molecules

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In the context of a nation's economy, the terms "produce" and "source" can refer to two important aspects of economic activity: the goods and services that a country produces, and the resources that a country uses to produce those goods and services.

In the context of economics, "produce" refers to the goods and services that are created or manufactured within a country or region. These goods and services can include anything from food, clothing, and electronics to transportation services, health care, and education. The production of goods and services is an important part of economic activity, as it creates value and generates income and employment for individuals and businesses within a country. The level of production within a country can be measured using various economic indicators, such as gross domestic product (GDP), which is the total value of all goods and services produced within a country's borders in a given period of time.

Here,

Overall, the concepts of "produce" and "source" are closely related in the context of a nation's economy, as a country's ability to produce is often closely tied to its ability to source the resources it needs to sustain economic growth and development.

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If he/she weighs 100 pounds, 36 gm of protein should be consumed by a person if he/she weighs 100 pounds. 

It is very important to maintain a balanced diet.

There are two ways to find the amount of protein consumed per day by a person.

1.  Weight in pounds, multiplied by 7, divided by 20

2. And the second way is to simply multiply the weight in pounds by 0.36.

As we all know, it is very important to consume all the nutrients in order to maintain a healthy body. Protein is one of the seven essential nutrients in a well-balanced diet. 

It is used to repair cells and also helps with growth in children.

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Answer:

C. The final substance in beaker A is a pure substance while in Beaker B is a mixture

Explanation:

A pure substance is a substance that contains a constant and definite proportion of a single substance. Elements and compounds are the two known pure substances while mixtures are substances of different compositions mixed together.

In this question, two beakers; A and B are said to contain different substances. Beaker A contains elemental sulfur (S) that forms a yellow powder while beaker B contains sand and water. From the explanation above, the final substance in beaker A is a pure substance (element) while in beaker B is a mixture of sand and water.

Answer:

all of the above

Explanation:

Answer:

All of the above

Explanation:

Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.

Answer:

The two hydrogen atoms and one oxygen atom within water molecules (H2O) form polar covalent bonds. ... As a result of water's polarity, each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds.

Explanation:

Not my work, but I hope this helps!

Answer:

Tetrahedral. Tetra- signifies four, and -hedral relates to a face of a solid; “tetrahedral” literally means “having four faces. ” This shape is found when there are four bonds all on one central atom, with no lone electron pairs. In accordance with the VSEPR theory, the bond angles between the electron bonds are 109.5o ...

There are two characteristics of molecules, one is geometry and other is shape. Shape is excluding lone pair surrounding the central element and geometry is including the lone pair. Therefore, the geometry of given molecule is tetrahedral.

VSEPR stands for valence shell electron pair repulsions. VSEPR theory is used to predict the shape and geometry of molecules on the basis of valence electrons pairs that are present around the central element of the molecule.

According to VSEPR theory, Lone pair lone pair repulsion is greater than bond pair bond pair repulsion. There are so many limitations of VSEPR theory. There is a repulsion between bond pair electrons and lone pairs present on the central element.

A molecule has four bonded atoms around a central atom. The central atom does not have any lone pairs of electrons. The geometry of such molecule is Tetrahedral. Geometry does not include lone pair on central atom.

Therefore, the geometry of given molecule is tetrahedral.

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Answer:

The final pressure of the gas is 5 liters.

Explanation:

Let suppose that gas experiments an isothermal process and is an ideal gas. Hence, volume is inversely proportional to pressure, that is:

\(P_{1}\cdot V_{1} = P_{2}\cdot V_{2}\) (1)

\(P_{1}, P_{2}\) - Initial and final pressure, in atmospheres.

\(V_{1}, V_{2}\) - Initial and final volume, in liters.

If we know that \(P_{1} = 3.50\,atm\), \(V_{1} = 2.5\,L\) and \(P_{2} = 1.75\,atm\), then the final volume of the gas is:

\(V_{2} = \frac{P_{1}}{P_{2}}\cdot V_{1}\)

\(V_{2} = 5\,L\)

The final pressure of the gas is 5 liters.

Explanation:

People also ask

What is the importance of nitrogen for plants?

Nitrogen is an essential macronutrient for plant function and is a key component of amino acids, which form the building blocks of plant proteins and enzymes. Proteins make up the structural materials of all living matters and enzymes facilitate the vast array of biochemical reactions within a plant.

Answer:

Nitrogen is vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide(i.e.,photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.

I hope this helps.

Answer:

gas

Explanation:

gas cant be aditanified as a gas if this is not right i am so sorry.

Enzymes that eventually break down the surface of bacteria are found in saliva, mucus, and tears, which act as chemical barriers against infection.

Enzymes found in saliva, mucous, as well as tears that degrade bacterial surfaces serve as chemical barriers preventing infection. The stomach's acid as well as the acid in sweat both destroy cellular pathogens, and even the semen contains antibacterial proteins.

There is no chemical and physical barrier offered by macrophages. Instead of acting as a barrier, macrophages target pathogens once they have already entered the body. Physical barriers include mucus as well as stratified squamous epithelium, whereas chemical barriers include saliva and urine.

Therefore, Enzymes that eventually break down the surface of bacteria are found in saliva, mucus, and tears, which act as chemical barriers against infection.

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The empirical formula represents the simplest whole-number ratio of atoms in a compound. In order to determine the empirical formula, we must first determine the number of moles of each element present in the compound.

Then, we must divide each of these values by the smallest value obtained. This will give us the ratio of the elements, which will allow us to write the empirical formula of the compound.
Given data:
Mass of compound = 180.00 g
Mass of sodium (Na) = 30.06 g
Mass of chromium (Cr) = 72.50 g
Mass of oxygen (O) = 77.44 g


The ratio of Na:Cr:O is therefore 1:1.067:3.707. However, empirical formulas should be in the simplest whole number ratio. Therefore, we will multiply all values by the smallest whole number that will give us a whole number ratio. In this case, we can multiply all values by 3 to obtain a whole number ratio: Na:Cr:O = 3:3.201:11.121 .

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Answer:

B.) a cation that is smaller than the original atom

Explanation:

When the atoms of an element gains or loses electrons, it becomes charged. This charged atom is called an ION. An ion can either be a CATION or ANION depending on whether the atom loses electrons to become positively charged (cation) or gains electrons to become negatively charged (anion).

In this case, magnesium (Mg) atom gives up or loses electron(s) to become an ion, it will become positively charged and hence called a CATION. However, since it loses electrons in its atom, it becomes SMALLER than the original magnesium atom. This is because the electrons left in the atom becomes more attracted to the nucleus and decreases the ionic radius.

After 6 days, approximately 56.5 mg of bismuth-210 remains.

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Answer:

Covalent

Explanation:

Chlorine monofluoride (ClF) is a chemical compound, and the atoms are connected by a single covalent bond.