Is the following statement about our solar system true or false?

Three-quarters of the planets are larger than Earth

The specimen at 100x zoom can be identified as an Animal cell as per the observations of it containing the cytoplasmic elements like the cytosol.

Organelles, cytoplasmic elements, the cytosol, and the cell membrane make up the normal structure of an animal cell.

Each of the cell's organelles is a membrane-bound structure with a specific function. Animal cells are the kind of typical eukaryotic cells because they have the presence of a membrane-bound nucleus and organelles and are encased in a plasma membrane.

Animal cells lack a cell wall, in contrast to eukaryotic cells found in plants and fungus. The building blocks of all living things in the kingdom Animalia are called animal cells.

They give bodies shape, take in nutrients to turn into energy, and aid in animal movement. They are also capable of self-replication and contain all an organism's genetic material.

The biggest organelle in animal cells is the nucleus. Cell activity is controlled by the nucleus. It also includes the chromosomes of the cell.

The genetic material (DNA) that makes you who you are is contained in the chromosomes.

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Answer: to produce 25 g of NaCl, we would need 81.2 g of MgCl2.

To produce 25 g of NaCl, we need to determine the amount of MgCl2 required based on the given equation:

From the equation, we know that 1 mole of MgCl2 produces 2 moles of NaCl. Therefore, we need to use the molar mass of NaCl and the stoichiometric ratio to find the amount of MgCl2 required.

1. Calculate the number of moles of NaCl:

moles NaCl = mass NaCl / molar mass NaCl
moles NaCl = 25 g / 58.44 g/mol (molar mass of NaCl)
moles NaCl = 0.427 mol

2. Use the stoichiometric ratio to find the number of moles of MgCl2:

moles MgCl2 = (2 moles NaCl / 1 mole MgCl2) x (0.427 mol NaCl)
moles MgCl2 = 0.854 mol

3. Calculate the mass of MgCl2:

mass MgCl2 = moles MgCl2 x molar mass MgCl2
mass MgCl2 = 0.854 mol x 95.21 g/mol (molar mass of MgCl2)
mass MgCl2 = 81.2 g

Therefore, to produce 25 g of NaCl, we would need 81.2 g of MgCl2.

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Answer:

no, food is not a fuel because it just give energy to do many activities but it will not provide any fuel only the dead and decaying material which berries under the soil then after a long years it becomes fossil fuel

The free energy change for the reaction at 35 ∘C is -1157.45 KJ

Gibbs free energy also termed as the Gibbs energy as well as free enthalpy, or Gibbs function is a quantity which is also used to measure the maximum amount of work done in thermodynamic system when the pressure and temperature are kept constant.

Formula of Gibb's free energy is as follows:

ΔG = ΔH -TΔS

ΔH =1269.8 kJ

ΔS= -364.6 J/K

T = 35ºC = 308.15

ΔS = x 0.001 = 0.3646

ΔG = 1269.8 kJ -(308.15x-0.3646)

ΔG = -1157.45 kJ

Therefore, it is a spontaneous process.

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The volume needed to make 1.98 M of the solution is 2.12L

Molarity of a given solution is defined as the total number of moles of solute per litre of solution. One molar is the molarity of a solution where one gram of solute is dissolved in a litre of solution. As we know, in a solution, the solvent and solute blend to form a solution, hence, the total volume of the solution is taken.

Given,

Molarity = 1.98m

Moles = 4.2 mol

Molarity = number of moles of solute / volume of solution in L

Volume = moles / molarity

= 4.2 / 1.98

= 2.12 L

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Answer:

B.C5H12 that is pentane

Explanation:

hydrocarbon has only hydrogen and carbon atoms

The molecular weight (W) of the polyatomic ideal gas is equal to the temperature (T) divided by the volume (V) calculated as 0.123 kJ/(K).

The molecular weight (W) of the polyatomic ideal gas can be determined using the ideal gas equation:

PV = mRT

where:

P = pressure of the gas (in this case, it is not given)

V = volume of the gas (in this case, it is not given)

m = mass of the gas (in kilograms)

R = ideal gas constant (0.123 kJ/(kg.K))

T = temperature of the gas (in Kelvin)

To calculate the molecular weight (W), we need to find the value of m. Since the pressure and volume are not provided, we can rearrange the ideal gas equation as follows:

m = PV / (RT)

Now, let's assume a hypothetical situation where we have 1 kg of the polyatomic ideal gas. In this case, the mass (m) would be equal to 1 kg.

Substituting the values into the equation:

m = (1 kg) * V / (0.123 kJ/(kg.K) * T)

Here, we can see that the units of kilograms (kg) cancel out, leaving us with:

1 = V / (0.123 kJ/(K))

To isolate V, we multiply both sides of the equation by 0.123 kJ/(K):

0.123 kJ/(K) = V

Now, we have the volume (V) in cubic meters. The molecular weight (W) can be calculated using Avogadro's law, which states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.

To calculate the molecular weight (W), we need to determine the number of moles (n) of the gas. The number of moles can be found using the equation:

n = PV / (RT)

However, since the pressure and volume are not provided, we cannot calculate the number of moles directly. Instead, we can make use of the molar mass (M) of the gas, which is the mass of 1 mole of the gas.

The molar mass (M) is related to the molecular weight (W) as follows:

M = W / 1000

Since we assumed a mass of 1 kg earlier, the molar mass (M) can be calculated as:

M = (1 kg) / n

Substituting the value of n from the equation above:

M = (1 kg) / (PV / (RT))

M = RT / PV

Now, substituting the value of R (0.123 kJ/(kg.K)) and rearranging the equation:

M = (0.123 kJ/(kg.K)) * T / (0.123 kJ/(K) * V)

The units of kJ cancel out, leaving us with:

M = T / V

Using the value of V we calculated earlier (0.123 kJ/(K)), we can determine the molecular weight (W) of the polyatomic ideal gas.

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Answer:

When an atom loses or gains electrons it is called an ion.

Explanation:

brainiest please!

The reaction produces CH3COONa and water.The reaction is given below:

CH3COOH + NaOH → CH3COONa + H2O

Hence, the substance that will give an aqueous solution of

pH<7 is CH3COONa.

Among the given options, the substance that will give an aqueous solution of

pH<7 is CH3COONa.

The answer is d. CH3COONa.What is the pH scale?The pH scale ranges from 0 to 14. A pH of 7 is regarded as neutral. A solution is acidic if its pH is less than 7. If the pH of the solution is greater than 7, it is considered to be basic. Water, with a pH of 7, is neutral. The formula of acetic acid is CH3COOH. The salt of this acid is CH3COONa, which is called sodium acetate. When acetic acid is completely ionized, sodium acetate is formed. In the reaction, the H+ ions from acetic acid react with the OH- ions from sodium hydroxide, producing water. The reaction produces CH3COONa and water.The reaction is given below:

CH3COOH + NaOH → CH3COONa + H2O

Hence, the substance that will give an aqueous solution of

pH<7 is CH3COONa.

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Answer:

M₂ = 0.34 M

Explanation:

Given data:

Molarity of NaOH =M₁ =  0.200 M

Volume of HF =V₂=  18.25 mL

Volume of NaOH added = V₁ = 31.20 mL

Molarity of HF solution = M₂ = ?

Solution:

M₁V₁  =  M₂V₂

by putting values,

0.200 M × 31.20 mL = M₂ × 18.25 mL

M₂ = 0.200 M × 31.20 mL /  18.25 mL

M₂ = 6.24 M.mL / 18.25 mL

M₂ = 0.34 M

The hydrogen cyanide (HCN) molecule consists of three atoms: hydrogen (H), carbon (C), and nitrogen (N). It forms a linear molecular structure. In HCN, the bond between carbon and nitrogen is a triple bond (C≡N), which consists of one sigma bond and two pi bonds.

The sigma bond is formed by the overlap of one hybridized orbital from carbon and one hybridized orbital from nitrogen. The two pi bonds are formed by the overlap of unhybridized p orbitals, one from each atom.

The sigma bond provides strong and direct bonding, while the pi bonds contribute to the overall stability of the molecule. Therefore, the HCN molecule contains one sigma bond and two pi bonds.

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The answer is none of these, as the closest option is D) 21.3 g, which is not the correct amount of NaOH needed to make the best buffer.

To make the best buffer, we want to add enough NaOH to react with half of the acetic acid, creating an equal amount of acetate ion. The equation for this reaction is:
CH3COOH + NaOH → CH3COO- + H2O + Na+
Using stoichiometry, we can determine the amount of NaOH needed to react with half of the acetic acid:
1 mole of acetic acid reacts with 1 mole of NaOH
1.250 moles of acetic acid × (1/2) = 0.625 moles of acetic acid
0.625 moles of NaOH are needed to react with 0.625 moles of acetic acid
The molar mass of NaOH is 40.00 g/mol, so the mass of NaOH needed is:
0.625 moles of NaOH × 40.00 g/mol = 25.00 g of NaOH

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Answer:   Y  21.38 % , Al  32.44 % and O 46.16 %

Explanation: Molar mass of YAl5O12 is 88.91 + 5·26.98+12·16

= 415.81 g/mol

  m-% ( Y) = 88.91 / 415.81 = 21.38 % ,     m-% (Al) = 5·26.98 / 415.81 =

  32.44 %  , rest is Oxygen

Answer:

432

Explanation:

Answer:

Feather

Explanation:

A feather is a solid which doesn't change its shape or size.

Carbon Dioxide and Oxygen are both gases that don't have a fixed size or shape.

Milk is a liquid which can change its shape but not size.

Answer:

D

Explanation:

Because it has equal number of elements on each side of the arrow

Considering the definition of Avogadro's Number, 7.37×10²² moles of Cu are in a 3.56g sample of Cu?

The molar mass of substance is the amount of mass that a substance contains in one mole.

Avogadro's Number is the number of particles that make up a substance (usually atoms or molecules) in the amount of one mole of the substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number applies to any substance.

The molar mass of Cu is 63.54 g/mole. The amount of moles of Cu can be calculated as:

amount of moles= 3.56 g÷ 63.54 g/mole

amount of moles= 0.056 moles

Now you can apply the following rule of three: 1 mole of the compound has 6.023×10²³ atoms, 0.056 mole contains how many atoms?

amount of atoms of Cu= (0.056 moles ×6.023×10²³ atoms)÷ 1

amount of atoms of Cu= 7.37×10²²

Finally, 7.37×10²² moles of Cu are present.

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The common way is the use of active voice when writing an abstract because passive voice make an indirect writing of the action and indication of a person in the action.

Abstract is the first phase of a thesis or a publication in a journal. It briefly summarizes about what we are going tp communicate through that paper or thesis what are the major methods used and also tell about the major findings and conclusions.

Thus, abstract must be concise but sharp and clear to the point about each step in the experiment of the scientific investigation whatever. It must be following the same tense of action that is in past or present. All sentence should follow the same tense.

Now, it is commonly better to avoid passive voice to write the actions and if possible write it in active voice. Direct indication of the person in charge and the action is good to read.

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The carbon dioxide produced during the breakdown of pyruvic acid is a byproduct of decarboxylation and the Krebs cycle. This CO2 is expelled from the cell as waste, while the remaining compounds continue through the process of cellular respiration to generate ATP, which provides energy for the cell.

The carbon dioxide produced during the breakdown of pyruvic acid plays a crucial role in the process of cellular respiration. Pyruvic acid, a three-carbon compound, is generated through glycolysis, the first stage of cellular respiration that occurs in the cytoplasm.

When pyruvic acid enters the mitochondria, it undergoes a process called decarboxylation, facilitated by the pyruvate dehydrogenase complex. During decarboxylation, one carbon atom is removed from the pyruvic acid molecule, forming carbon dioxide as a byproduct. This CO2 is subsequently released from the cell as waste.

Simultaneously, the remaining two-carbon molecule, called acetyl CoA, combines with oxaloacetate in the Krebs cycle (also known as the citric acid cycle or TCA cycle). Throughout the Krebs cycle, the carbon molecules undergo a series of reactions, which ultimately lead to the formation of additional CO2 molecules. These CO2 molecules are also released as waste products.

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Answer:

The product will form at the same rate at which it decomposes.

Explanation:

hope it helps

Answer:   The product will form at the same rate at which it decomposes.

Explanation:    I took the test

The balanced equation for the reaction between aluminum and zinc chloride is 2 Al + 3 ZnCl2 → 2 AlCl3 + 3 Zn.The balanced equation is as follows:

2 Al + 3 ZnCl2 → 2 AlCl3 + 3 Zn

In the given unbalanced equation, we have aluminum (Al) reacting with zinc chloride (ZnCl2). To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal.

On the left side, we have one aluminum atom (Al), while on the right side, we have two aluminum atoms in aluminum chloride (AlCl3). To balance the aluminum atoms, we place a coefficient of 2 in front of Al on the left side.

Next, we move on to the chlorine atoms. On the left side, we have two chlorine atoms in zinc chloride (ZnCl2). On the right side, we have six chlorine atoms in aluminum chloride (AlCl3). To balance the chlorine atoms, we place a coefficient of 3 in front of ZnCl2 on the left side.

After balancing, we have 2 Al + 3 ZnCl2 → 2 AlCl3 + 3 Zn.

This balanced equation shows that two moles of aluminum react with three moles of zinc chloride to produce two moles of aluminum chloride and three moles of zinc.

In conclusion, the balanced equation for the reaction between aluminum and zinc chloride is 2 Al + 3 ZnCl2 → 2 AlCl3 + 3 Zn.

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Answer: The volume of the solution is 85.7 mL

Explanation:

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

\(\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}\) .....(1)

We are given:

Molarity of solution = 0.600 M

Given mass of \(BaSO_4\) = 12.00 g

We know, molar mass of \(BaSO_4=[(1\times 137.33)+(1\times 32.07)+(4\times 16)]=233.4g/mol\)

Putting values in equation 1, we get:

\(0.600=\frac{12.00\times 1000}{233.4\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{12.00\times 1000}{233.4\times 0.600}=85.68mL=85.7mL\)

The rule of significant number that is applied for the problems having multiplication and division:

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Here, the least number of significant figures is 3 that is determined by the number, 0.600. Thus, the answer must have these many significant figures only.

Hence, the volume of the solution is 85.7 mL

1.63 M

Math

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Chemistry

Unit 0

Aqueous Solutions

Step 1: Define

1.43 mol NaCl (sodium chloride)

0.875 L solution

Step 2: Find M

Step 3: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.63429 M ≈ 1.63 M

During that icy hot lab, 65,000 J of energy was transferred to 450 g of water at 20°C, the final temperature of the water will be 54.5 °C.

Energy transferred = 65,000 J or 65 KJ

Mass of the water = 450 g

Initial temperature (T1) = 20 °C

Final temperature (T2) = ?

Specific heat of H2O = 4.186 J /g. °C

We will calculate the final temperature by using the following equation.

q = m.c.ΔT

Rearrange it for ΔT

ΔT = q / m.c

And ΔT = T2 - T1

Put ΔT value in the equation

T2 - T1 = q / m.c

Put the values

T2 - 20°C = 65000 j / 450 g × 4.186 J /g. °C

T2 - 20°C = 65000 j / 1883.7 j /°C

T2 - 20°C = 34.51 °C

T2 = 34.51 °C + 20 °C

T2 = 54.5 °C

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The short circuit is not a shock hazard because a short circuit will typically not involve an electric current that is powerful enough to cause injury or shock. When a short circuit occurs, the circuit becomes overloaded and trips the circuit breaker, preventing any electric current from flowing through the circuit. This prevents any potential shock hazards.

A short circuit isn't a shock hazard because it occurs when a hot wire comes in contact with a neutral wire or ground wire, causing an immediate and drastic increase in electrical current. This causes a breaker to trip or a fuse to blow, effectively cutting off the electrical supply and preventing a shock hazard. However, it is important to note that short circuits can still be dangerous as they can cause fires or damage electrical equipment.

In summary, a short circuit isn't a shock hazard because it causes an immediate increase in electrical current that trips a breaker or blows a fuse, effectively cutting off the electrical supply and preventing a shock hazard. However, short circuits can still be dangerous and should be addressed by a professional electrician.

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The number of mole present in the aluminum foil, given that the foil has a thickness of 1.0 mm is 0.7 mole

We'll begin by obtaining the mass of the aluminum foil. Details below:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of aluminum = 2.702 × 7

Mass of aluminum = 18.914 g

Finally, we shall determine the number of mole present. Details below:

Mole = mass / molar mass

Number of mole of aluminum = 18.914 / 27

Number of mole of aluminum = 0.7 mole

Thus, the number of mole is 0.7 mole

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The difference between an independent variable and a dependent variable is an independent variable is the variable that is manipulated by the experimenter, and a dependent variable is the variable that is measured to see if it is affected by the independent variable.

In statistics, an independent variable is a variable that is manipulated or controlled by the researcher to observe its effect on a dependent variable.

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The independent variable in an experiment is the factor that researchers deliberately change to test its effects, while the dependent variable is the factor that they measure to see if it changes in response to the manipulation of the independent variable.

The difference between an independent variable and a dependent variable is that an independent variable is a factor in an experiment that the researcher manipulatively changes to see if it has any effect, while a dependent variable is the factor the researcher measures to see if it changes as a result of the manipulation of the independent variable.

For example, if you were running an experiment to see if different amounts of sunlight affected the rate at which a plant grows, the independent variable would be the amount of sunlight the plant receives (because you, the researcher, are changing it), and the dependent variable would be the growth rate of the plant (because you are measuring this to see if it changes in response to the changing amount of sunlight).

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