What is the name of the following chemical compound?

Answer:

A group of cells working together is defined as a tissue and several tissues working together comprise an organ.

Explanation:

Answer:

66vhiib

Explanation:

The laboratory that must have an effluent decontamination system to inactivate liquid wastes is BSL4 (Biosafety Level 4). BSL4 laboratories handle highly dangerous and exotic pathogens that pose a high risk of transmission and have no known treatment or vaccines. The effluent decontamination system is necessary in BSL4 labs to ensure that liquid wastes containing these pathogens are properly treated and inactivated before being discharged from the facility, minimizing the risk of environmental contamination and ensuring public safety.

Liquid is a chemical substance whose nature or form is in the form of a liquid substance. Therefore, every liquid substance will be included in the category of liquid substance form and is denoted or symbolized by the letter (l).

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The alpha decay of the isotope of the element produces lead-206 is the polonium (Po)- 210.

Alpha decay is the process, the alpha particles is the emitted when the heavier nuclei decays into the lighter nuclei. Then the  alpha particle released has the charge of the +2 units.

The representation of the alpha decay is as :

\(X^{A}{z} }\) --->  Y⁴₂  +  α⁴₂

Y⁴₂  = Pb²⁰⁶₈₂

Z - 2 = 82

Z = 84

A - 4 = 206

A = 210

The atomic mass, A = 210

The atomic number, Z = 84

Therefore, the element is the polonium (Po) that has the atomic number is the 84 and the atomic mass is the 210.

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Answer: The mass of \(H_2\) produced is 0.153 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

Given mass of zinc = 5.0 g

Molar mass of zinc = 65.38 g/mol

Putting values in equation 1, we get:

\(\text{Moles of zinc}=\frac{5.0g}{65.38g/mol}=0.0765mol\)

Given mass of HCl = 10.0 g

Molar mass of HCl = 36.46 g/mol

Putting values in equation 1, we get:

\(\text{Moles of HCl}=\frac{10.0g}{36.46g/mol}=0.274mol\)

The given chemical equation follows:

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

By stoichiometry of the reaction:

If 1 mole of zinc reacts with 2 moles of HCl

So, 0.0765 moles of zinc will react with = \(\frac{2}{1}\times 0.0765=0.153mol\) of HCl

As the given amount of HCl is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, zinc is considered a limiting reagent because it limits the formation of the product.

By the stoichiometry of the reaction:

If 1 mole of zinc produces 1 mole of \(H_2\)

So, 0.0765 moles of zinc will produce = \(\frac{1}{1}\times 0.0765=0.0765mol\) of \(H_2\)

We know, molar mass of \(H_2\) = 2 g/mol

Putting values in above equation, we get:

\(\text{Mass of }H_2=(0.0765mol\times 2g/mol)=0.153g\)

Hence, the mass of \(H_2\) produced is 0.153 g

The variable that is unknown until the experiment is performed is the dependent variable.

In a scientific experiment, variables are classified into two main categories: independent variables and dependent variables. The independent variable is the variable that is intentionally manipulated or changed by the experimenter. It is under the control of the experimenter and is deliberately altered to observe its effect on the dependent variable.

On the other hand, the dependent variable is the variable that is measured or observed as the outcome or response in the experiment. It is the variable that is expected to change in response to the manipulation of the independent variable. The value or behavior of the dependent variable depends on the value or behavior of the independent variable.

Typically, before conducting an experiment, researchers have a hypothesis or an expectation about how the independent variable will affect the dependent variable. However, the actual outcome or result of the experiment, which is observed through the measurement of the dependent variable, remains unknown until the experiment is performed.

The purpose of conducting the experiment is to gather empirical data and observe the changes in the dependent variable to analyze the relationship between the independent and dependent variables.

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Choose the products that complete the reaction. The chemical equation may not be balanced.

NaHCO3 + HC2H3O2

Answer: NaC2H3O2 + CO2 + H2O

Answer:

There are 10 oxygen atoms reacting for every six oxygen atoms produced in CO2

Explanation:

Ther

We can confirm that malachite and pyrite are similar in that they are both carbonate minerals, they differ however in chemical composition and characteristics.

Pyrite is a form of iron sulfide. This mineral has come to be known as the fool's gold, for its striking resemblance to gold. Malachite, on the other hand, has been known to closely resemble emeralds and is often used as a gemstone. They are both carbonate minerals, but malachite is copper-based, giving it a different chemical composition and properties.

Therefore, we can confirm that malachite and pyrite are similar in that they are both carbonate minerals, they differ however in chemical composition and characteristics.

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The mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

The mass of one mole of Nitrogen gas is 28 g/mol.

The number of atoms in one mole of Nitrogen gas is 6.022 x 10²³ molecules.

The mass of Nitrogen gas in the given number of molecules is calculated as follows;

6.022 x 10²³  --------------------- 28 g/mol

3.0 x 10²³ ----------------------------- ?

\(= \frac{3.0 \times 10^{23} \times 28}{6.022 \times 10^{23} } \\\\= 13.95 \ g\)

Thus, the mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

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In acidic medium, nucleophile attacks at more substituted carbon. In basic medium, nucleophile attacks at less hindered side i.e nucleophile attacks at less substituted carbon.

a substance that reacts by supplying two electrons to create a new covalent bond (i.e. a Lewis base). Bronsted-Lowry bases, or simply bases, are nucleophile that share an electron pair with a proton. In an SN2 reaction, the hydrogen ion acts as the nucleophile. The charge of a nucleophile might be neutral or negative. The nucleophile must be a good Lewis base in all scenarios, which means it must be willing to share electrons.

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Based on the calculations performed in this experiment, the same mass of a solute with a significantly higher molar mass would have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

Boiling point elevation is a thermodynamic phenomenon that occurs when the boiling point of a solvent (a substance that dissolves a solute to create a solution) is increased by adding another substance, the solute, to it. When a solute is added to a solvent, it lowers the freezing point and raises the boiling point of the solvent, which is known as the boiling point elevation.The formula for boiling point elevation is: ∆Tb = Kbm

Here, ∆Tb is the boiling point elevation, Kb is the molal boiling point elevation constant, and m is the molality of the solution. To understand this, let us take an example: Suppose a solution containing 1.0 mol of sodium chloride (NaCl) is dissolved in 1.0 kg of water. The molality of the solution is 1.0 mol / 1.0 kg = 1.0 m. In addition, the Kb for water is 0.51 °C/molal, which means that the boiling point elevation is 0.51 °C when the molality of the solution is 1.0 mol/kg.So, the boiling point of the solution will be raised by 0.51 °C, which can be calculated using the above formula.Calculation performed in this experiment:Boiling point elevation = ΔTb = Kb . mTherefore, based on the above formula, the boiling point elevation is directly proportional to the molality of the solution, which, in turn, is directly proportional to the number of moles of solute in the solution. Furthermore, the number of moles of solute is proportional to the mass of the solute (in grams) divided by its molar mass (in grams/mol).So, if a solute with a significantly higher molar mass is added to the solvent, it will have a larger effect on the boiling point elevation. As a result, the same mass of a solute with a higher molar mass will have a greater effect on the boiling point elevation.

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Sc³⁺ is not isoelectronic with the others, as it does not have the same number of electrons in its outermost shell instead of the same amount of electrons as the other four atoms. Thus option c is correct.

Isomerism is a phenomenon in which various compounds have the same formula but different structural arrangements, leading to differences in properties like melting point, boiling point, etc.

The term isoelectronic means having the same number of electrons. Two or more species that have the same number of electrons are known as isoelectronic species.

a. S²⁻ has 18 electrons (16 from S and 2 from the -2 charge)

b. Ar has 18 electrons

c. Sc³⁺ has 17 electrons (21 from Sc and 3 from the +3 charge)

d. Ti⁴⁺ has 18 electrons (22 from Ti and 4 from the +4 charge)

e. Ga³⁺ has 18 electrons (21 from Ga and 3 from the +3 charge)

Thus, the only ion not isoelectronic with the others is S³⁺. Therefore, Option C is the correct answer.

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Answer:

the oil spreads to cover the water

Answer:

I think it is ; The oil floats to the surface of the water

Explanation:

I don't know about the other one.

The partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

Given that the partial pressure of oxygen at the surface where the total pressure is 1.00 atm is 0.21 atm, we can use the following formula to calculate the partial pressure of oxygen at a depth of 80 m:

P2 = P1 + (d × ρ × g) where,P1 = 1 atm, P2 = 9 atm (total pressure at 80 m depth), ρ = density of air = 1.29 kg/m3 (at standard temperature and pressure), g = acceleration due to gravity = 9.8 m/s2, d = depth = 80 m

Now, substituting the given values in the above formula:

P2 = P1 + (d × ρ × g)

P2 = 1 + (80 × 1.29 × 9.8)

P2 = 1 + 1011.36

P2= 1012.36 Pa

Thus, the partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

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Answer: D. 434 K

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)

where,

\(V_1\text{ and }T_1\) are the initial volume and temperature of the gas.

\(V_2\text{ and }T_2\) are the final volume and temperature of the gas.

We are given:

\(V_1=606ml\\T_1=35^oC=(35+273)K=308K\\V_2=854ml\\T_2=?\)

Putting values in above equation, we get:

\(\frac{606}{308}=\frac{854}{T_2}\\\\T_2=434K\)

Thus  temperature necessary for the  gas to have a volume of 854 ml is 434 K

The Lewis structure of H2S, or hydrogen sulfide, can be drawn as follows: First, the central atom sulfur (S) is surrounded by two hydrogen (H) atoms.

Since sulfur has six valence electrons and each hydrogen atom has one valence electron, the total number of valence electrons in the H2S molecule is:

6 (sulfur) + 2(1 electron per hydrogen) = 8 electrons

To draw the Lewis structure, we first place the atoms in a linear arrangement, with sulfur in the center and the hydrogen atoms on either side. Each hydrogen atom forms a single bond with the sulfur atom, and each bond contains two electrons. This uses up four of the eight available valence electrons, leaving four more to be placed on the sulfur atom. To complete the octet of the sulfur atom, we add two lone pairs of electrons to it. These lone pairs are represented as two dots around the sulfur atom. The Lewis structure of H2S is then:

H

|

H—S—H

|

: :

In this structure, the sulfur atom has a complete octet of valence electrons (two bonding pairs and two lone pairs), and each hydrogen atom has a full valence shell with two electrons. This structure satisfies the octet rule, which states that atoms tend to bond in such a way as to achieve a full outer shell of eight electrons.

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Answer:

it D because it make more sense

Answer:

Classifying stars according to their spectrum is a very powerful way to begin to understand how they work.  As we said last time, the spectral sequence O, B, A, F, G, K, M is a temperature sequence, with the hottest stars being of type O (surface temperatures 30,000-40,000 K), and the coolest stars being of type M (surface temperatures around 3,000 K).  Because hot stars are blue, and cool stars are red, the temperature sequence is also a color sequence.  It is sometimes helpful, though, to classify objects according to two different properties.  Let's say we try to classify stars according to their apparent brightness, also.  We could make a plot with color on one axis, and apparent brightness on the other axis, like this:

Explanation:

Answer:

The Sun is a yellow star that's both average in brightness and temperature and is classified as

C) Main sequence

Answer:

Explanation:

because

Neon and Krypton, both are belongs to Inert or Noble gas Group

The ΔG is 5.61 kJ.

To calculate the ΔG of a chemical reaction, it is necessary to use the formula of ΔG, and replace the values:

Remember to convert 93.0 J to kJ to solve it.

So, the ΔG for this reaction is 5.61 kJ.

Answer:

the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Answer:

59.46 g

Explanation:

To answer this question, the molecular weight of ammonium sulfate must be computed.  To accomplish this, the weights of the individual elements must be noted.
N=14.01\(\frac{g}{mol}\)

H=1.01\(\frac{g}{mol}\)

S=32.07\(\frac{g}{mol}\)

O=16.00\(\frac{g}{mol}\)

To compute the molecular weight:

\(2[14.01\frac{g}{mol}+4(1.01\frac{g}{mol})]+32.07\frac{g}{mol}+4(16.00\frac{g}{mol})=132.14\frac{g}{mol}\)

To calculate the mass:

\(0.45 mol(\frac{132.14g}{1mol})=59.463g\)

So, the density of the unknown metal is 0.628 g/ml.

To find the density of the unknown metal, we can use the formula:

Density = mass / volume

We know the mass of the metal is 10.18 g. To find the volume, we need to subtract the initial volume of the water in the graduated cylinder from the final volume after the metal was added:

Volume of metal = Final volume - Initial volume
Volume of metal = 66.20 ml - 50.00 ml
Volume of metal = 16.20 ml

Now we can plug in the values we know into the formula:

Density = mass / volume
Density = 10.18 g / 16.20 ml
Density = 0.629 g/ml

Therefore, the density of the unknown metal is 0.629 g/ml.

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Common glassware used in a laboratory or kitchen setting include beakers, flasks, test tubes, measuring cylinders, Erlenmeyer flasks, graduated cylinders, petri dishes, watch glasses, and burette.

Beakers are usually used to hold and mix liquids, while flasks are typically used to hold and heat liquids. Test tubes are used to conduct small-scale chemical reactions and mix solutions, while measuring cylinders are used to measure volumes of liquid. Erlenmeyer flasks are used to contain and mix solutions, and graduated cylinders are used to measure volumes of liquid. Petri dishes are used to culture bacteria and other microorganisms, while watch glasses are typically used to evaporate liquids. Finally, burettes are used to measure and deliver precise quantities of liquid.

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Answer:

Yes

Explanation:

You can find the density of the object using the law: density = mass / volume.

If the density of the object is less than the density of water (1g/cm3) then it will float, otherwise, it should sink.

Answer:

A transition from one accepted theory to another or from one employed method to another.

Explanation:

Answer:

the first one looks familiar I don't know where I saw him from

Answer:

Noble gases

Explanation:

The noble gases are non-metals that requires the highest amount of energy to remove an electron from their shells.

The reason for this difficult is that their electronic configuration confers a stable configuration them.