is there a correlation between the accuracy of a particular piece of glassware and its ease of use? explain why it is sometimes more appropriate to use a beaker than a pipet or buret.

Answer:

Explanation:

This is just a ratio question. Factor of increase = 27.2 / 3.20 = 8.50

Answer:

The systematic representation for the distribution of electrons in different energy levels of an atom or orbital of an atom is called electronic configuration .

The electronic configuration of chlorine is 1s^2,2s^2,2p^6,3s^2,3p^6

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This law states that matter can neither be created nor destroyed in an ordinary chemical reaction, but can change from one form to another.

What this implies is that when two elements or compound combine as a reactant to form a product, there's no loss of matter and the mass of the reactants must be equal to the mass of the product.

Given that

AlBr₃ + K₂SO₄ → KBr + Al₂(SO₄)₃

If we look closely at the above reaction, we would see that aluminuim is not balanced, potassium is also not balanced, bromine is not balance as well as sulphur and oxygen.

Let's put two moles attached to the AlBr₂ and three moles of K₂SO₄

2AlBr₃ + 3K₂SO₄ →

This would give us

6KBr + Al₂(SO₄)₃

If we add the two equations together,

2AlBr₃ + 3K₂SO₄ → 6KBr + Al₂(SO₄)₃

From the above, we have

2 atoms of Al on the reactant side and 2 atoms of Al on the product side

6 atoms of Br on the reactant side and 6 atoms of Br on the product side

6 atoms of K on the reactant side and 6 atoms of K on the product side

3 atoms of S on the reactant side and 3 atoms of S on the product side

12 atoms of O on the reactant side and 12 atoms of O on the product side

33g

explanation

n=mM

Where:

- n is the amount or number of moles

- m is the mass in grams

- M is the molar mass in grams/mole

n=0.75

Calculate molar mass by adding the atomic masses of all atoms in the molecule

M=12+16⋅2

=44

m=n⋅M

=0.75⋅44

=33g

Answer:

4.5 ×10^22)

Explanation:

no. of particles =no. of mole×avogadro's number of particles                                             no. of particles =0.75×6.02×10^23                                                                                                         no. of particles =4.5 ×10^22  

Answer:

So there is a physical version of it.

Therefore, the estimated energies of a proton in a 5.0 fm long box are approximately:

E1 = 1.808 x 10^-13 J

E2 = 7.234 x 10^-13 J

E3 = 1.631 x 10^-12 J

The allowed energies of a particle in a one-dimensional box are given by:

E = (n^2 * h^2) / (8 * m * L^2)

Where:

E is the energy of the particle

n is the quantum number (1, 2, 3, ...)

h is the Planck's constant (approximately 6.626 x 10^-34 J*s)

m is the mass of the particle (mass of a proton = 1.673 x 10^-27 kg)

L is the length of the box (5.0 fm = 5.0 x 10^-15 m)

For n = 1:

E1 = (1^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

For n = 2:

E2 = (2^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

For n = 3:

E3 = (3^2 * (6.626 x 10^-34 J*s)^2) / (8 * (1.673 x 10^-27 kg) * (5.0 x 10^-15 m)^2)

Now we can calculate the values:

E1 ≈ 1.808 x 10^-13 J

E2 ≈ 7.234 x 10^-13 J

E3 ≈ 1.631 x 10^-12 J

Therefore, the estimated energies of a proton in a 5.0 fm long box are approximately:

E1 = 1.808 x 10^-13 J

E2 = 7.234 x 10^-13 J

E3 = 1.631 x 10^-12 J

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Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.

What is Hydrocarbon?

A hydrocarbon is an organic compound made entirely of the two atom kinds of carbon and hydrogen. Hydrocarbons are typically colourless gases with barely perceptible odours. The four subcategories that are generally used to classify hydrocarbons are alkanes, alkenes, alkynes, and aromatic hydrocarbons. These chemicals' structures could be quite simple or extremely intricate. The study of hydrocarbons can provide insight into the chemistry and behavior of other functional groups. For commercial purposes, liquefied petroleum gas, which is produced from hydrocarbons like propane and butane, is also used as a fuel source (LPG). Benzene, one of the most fundamental aromatic hydrocarbons, serves as the building block for many synthetic drugs.

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Complete question

Name The Alkenes Below. Name The Alkenes Below. A) Ball& Sticklabels B) Ball & Stick ▼

Answer:

B

Explanation:

The answer is sunlight solar cells directly convert the sunlight into electricity

Answer:

B

Explanation:

Sunlight, or solar energy is the type of energy which is not used by a turbine to generate electricity.

Answer:

Mechanical Energy to Thermal Energy

When you strike a match, it moves through the air until it rubs against a surface. The rubbing produces the heat required to light the match. This is a transformation from mechanical energy to thermal (heat) energy.

Explanation:

Answer:

A is the answer.

Explanation:

Answer:

by mixing red and yellow

Explanation:

Answer:

Either the sun or by mixing red and yellow together because they make orange.

Explanation:

Brainliest pls

Answer:

The density of the cube is 0.5g/mL. Hoped this helped! :)

Explanation:

V= 12.0mL                                                                D=M/V

M= 6.0g

D= 6.0g/12.0mL

D= 0.5g/mL

a.) If M is a 2 × 2 matrix with det M = −2, and we want to find det((3M)-1) and det(3M-1),

then the formula to use is:

$$\det(cM) = c^n\det(M)$$ where $n$ is the order of matrix $M$.

1. Find det((3M)-1):

$$\begin{aligned}\det((3M)^{-1})&=\dfrac{1}{\det(3M)}\\\\&=\dfrac{1}{3^2\det(M)}\\\\&=\dfrac{1}{9(-2)}\\\\&=-\dfrac{1}{18}\end{aligned}$$

Therefore, det((3M)-1) = -1/18.

2. Find det(3M-1):

$$\begin{aligned}\det(3M-1)&=3^2\det(M-1/3)\\\\&=9\det(M-1/3)\\\\&=9\left|\begin{matrix}a-1/3 & b \\ c & d-1/3\end{matrix}\right|\\\\&=9\left(ad-\dfrac{a}{3}-\dfrac{d}{3}+\dfrac{1}{9}\right)\\\\&=3(3ad-a-d+1/3)\\\\&=9\det(M)-3\det(I)\\\\&=9(-2)-3(1)\\\\&=-21\end{aligned}$$

Therefore, det(3M-1) = -21.

b.) If A is a 5 × 5 matrix and det((2A)-1) = 1/8, then:

$$\begin{aligned}\det(2A)^{-1}&=\dfrac{1}{\det(2A)}\\\\\Rightarrow\dfrac{1}{8}&=\dfrac{1}{2^5\det(A)}\\\\\Rightarrow \det(A)&=2^5(8)\\\\&=256\end{aligned}$$

Therefore, det A = 256.

c.) If A and B are 3 × 3 matrices such that $\det(A) = 150$ and $\det(B) = 3$, then:

1. det(2A) = $2^3\det(A)$ = $2^3\times150$ = 1200
2. det(A + B) $\neq\det(A) + \det(B)$ (property does not hold true for addition)
3. det(AB) = $\det(A)\det(B)$ = $150\times3$ = 450

Therefore, det(2A) = 1200, det(A + B) $\neq$ det(A) + det(B), and det(AB) = 450.

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Answer:

Four folk love legends: "Cowhand and Weaver Girl", "Meng Jiangnu crying at the Great Wall" (cry Wan Xiliang), "Liang Shanbo and Zhu Yingtai", "The Legend of the White Snake", the author does not know

The development history of the Four ancient Chinese folk legends: China is a country with a vast territory and abundant resources and a long history, which contains extremely rich national cultural heritage. Among them, the four most Chinese ones are the famous "Cowhand and Weaver Girl", "Meng Jiangnu", "Liang Shanbo and Zhu Yingtai" and "The Legend of the White Snake". The most widespread, the most influential.

Brief introduction: the gigolo knit legend began in the book of songs, cable ":" Qi he vega ", "Huan he cow". "Nineteen Ancient Poems · Long Distance Star" has called the cowherd and weaver girl husband and wife. Ying Shao "custom" Yi wen: "Zhinv Tanabata when crossing the river, make magpie bridge, legend has it that the magpie head without reason all Kun, because beam (note: bridge) to cross Zhinv also. The story has been preliminarily formed and combined with the Qixi Festival custom.

The legend of Meng Jiangnu originated from the record of Qi Liang's wife refusing to hang herself in the area of the Marquis of Qi and adhering to the rules of etiquette in the Zhuan. Later, it was added in the Dangong that "Duke Zhuang of Qi attacked Ju and took away (tunnel) and Qi Liang died. The weeping wife who greeted his coffin on the road is the archetype of the story. Han Liu Xiang's Biography of Liannu (IV) : "Qi Liangzhu died in battle, his wife cried in the city, ten days the city collapsed." And Tang (anonymous) "carved jade collection" record "Qin when Yan Qi Liang, married Meng Chao female Zhongzi wife, because good was built the Great Wall officials killed, Zhongzi cry under the Great Wall, the city collapsed. It is known that this legend was popular in the Tang Dynasty, but Meng Zhongzi and Qiliang were renamed Meng Jiangnv and Fan Xiliang in the legend. The story of Butterfly lovers first appeared in Tang's "Ten Taoist and Four Tibetan Records", which recorded the story of Liang and Zhu "having a taste of schoolmates" and "sharing the tomb". There are more detailed records in Xuanbaozhi of late Tang Zhang Reading. To the Ming Dynasty Feng Menglong's "Ancient and modern novels", and added to the British Taiwan confused belt, Liang Shanbo doubts and butterflies.

The story of White Snake came into being the latest. The origin of the story is as follows. It originates from the Three Towers of West Lake. To the Ming Dynasty Feng Menglong's "Lady White Forever Town Leifeng Pagoda" (" Warning Word "), the story has been preliminarily finalized.

There is 3160 grams of iron in 4 kilograms of the hematite ore.

To calculate the amount of iron in 4 kilograms of the ore, we first need to determine the mass of Fe2O3 in the given sample. Since the sample is 79% Fe2O3, we can calculate the mass of Fe2O3 as follows:

Mass of Fe2O3 = 79% × 4 kilograms = 0.79 × 4000 grams = 3160 grams.

Since the molecular formula of Fe2O3 indicates that there are two atoms of iron (Fe) in one molecule of Fe2O3, we can conclude that there are also two atoms of iron in 1 mole of Fe2O3. The molar mass of Fe2O3 is approximately 159.69 grams per mole. Therefore, we can calculate the amount of iron (Fe) in grams by using the molar mass of Fe and the mass of Fe2O3:

Mass of iron (Fe) = (2 × molar mass of Fe × Mass of Fe2O3) / molar mass of Fe2O3

= (2 × 55.845 g/mol × 3160 g) / 159.69 g/mol

≈ 6230 grams.

Hence, there are 6230 grams of iron in 4 kilograms of the hematite ore.

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Answer:they are not the same because the composition differ

Explanation:

Answer:

it is when a state in which opposing forces or influences are balanced.

A example of equilibrium is in economics  supply and demand are equal.

Explanation:

Answer:

Compromise of 1850

Explanation:

Sample means for solutions 1 and 2 are 19.27 and 10.32 respectively

In semiconductor manufacturing,

The total for answer 1 is given by:

9.7+10.5+9.4+10.6+9.3+10.7+9.6+10.4+10.2+10.5 = 192.7

The sample size is 10 and provides us with

192.7/10 = 19.27

For solution 2, the sum is given by:

10.6+10.3+10.3+10.2+10.0+10.7+10.3+10.4+10.1+10.3 = 103.2

The sample size is 10, this gives us

103.2/10 = 10.32

The total for answer 2 is given by:

10.6+10.3+10.3+10.2+10.0+10.7+10.3+10.4+10.1+10.3 = 103.2

The sample size is 10 and provides us with

103.2/10 = 10.32

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In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metalization. The etch rate is an important characteristic in this process and is known to follow a normal distribution. Two different etching solutions have been compared, using two random samples of 10 wafers for each solution. Assume the variances are equal. The etch rates are as follows (in mils per minute): Solution 1 Solution 2 9.7 10.6 10.5 10.3 9.4 10.3 10.6 10.2 9.3 10.0 10.7 10.7 9.6 10.3 10.4 10.4 10.2 10.1 10.5 10.3 Calculate sample means of solution 1 and solution 2

Answer:

A trait is a specific characteristic of an organism. Traits can be determined by genes or the environment, or more commonly by interactions between them. The genetic contribution to a trait is called the genotype.

Explanation:

if not then its a feature,

ANSWER

The number of moles of NaOH is 432 moles

EXPLANATION

Given information

The number of moles of As = 144 moles

Let x represents the number of moles of NaOH

From the above reaction, you will see that 2 moles of As react with 6 moles of NaOH

The next step is to find the number of moles of NaOH using a stoichiometry ratio

Hence, the number of moles of NaOH is 432 moles

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

The correct answer to the mathematical expression for the reaction quotient (Qc) for this reaction would be:
Qc = ([C][D]^3)/([A]^2[B]) ,the expression for Qc only includes the concentrations of the gaseous and aqueous phases.

The mathematical expression for the reaction quotient (Qc) from a balanced elementary step taking phases into account is given by:
Qc = ([C]^c[D]^d)/([A]^a[B]^b)

Where [A], [B], [C], and [D] are the concentrations of the reactants and products in their respective phases, and a, b, c, and d are the stoichiometric coefficients in the balanced elementary step.

For example, consider the balanced elementary step:
2A(g) + B(aq) --> C(s) + 3D(l)

The mathematical expression for the reaction quotient (Qc) for this reaction would be:
Qc = ([C][D]^3)/([A]^2[B])

It is important to note that the concentrations of solid and liquid phases are not included in the expression for Qc, as their concentrations are assumed to be constant. Therefore, the expression for Qc only includes the concentrations of the gaseous and aqueous phases.

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The addition of HCl to the reaction mixture would alter the chemical equilibrium and shift the reaction towards the formation of aluminum hydroxide.

If HCl (hydrochloric acid) is added to the reaction mixture from the previous question, it would react with the NaAl(OH)4 (sodium tetrahydroxoaluminate) present in the mixture. The balanced chemical equation for this reaction would be:

HCl(aq) + NaAl(OH)4(aq) → Al(OH)3(s) + NaCl(aq) + H2O(l)

Here, the HCl would donate a proton to the NaAl(OH)4, resulting in the formation of Al(OH)3 (aluminum hydroxide), NaCl (sodium chloride), and H2O (water). This would be an acid-base reaction where HCl acts as an acid and NaAl(OH)4 acts as a base.

Since aluminum hydroxide is an insoluble solid, it would precipitate out of the solution as a white solid. This would be observed as a white cloudy appearance in the reaction mixture. Additionally, the solution would become more acidic due to the addition of HCl.

The presence of excess HCl in the solution could also lead to the dissolution of some of the aluminum hydroxide precipitate, resulting in a clearer solution.

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Answer:

In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period. It is the lightest element that has not yet been synthesized.

...

The first general equation represents a synthesis reaction and the second one is decomposition. Third equation represents a single displacement reaction and the last one is a double displacement reaction.

There are different types of reactions. The combination of two species A and B giving a single product is called a synthesis reaction.

Hence, A  + B ⇒ C is a synthesis reaction.

In decomposition reaction, one compound breakes into its constituent groups or elements.

AB ⇒ A + B  is a decomposition reaction.

In a single displacement reaction, one element or group from a reactant is displaced by the other.

AB + C ⇒ AC + B is  a single displacement reaction.

In double displacement reactions, two groups or elements are displaced by other two groups.

AB + CD ⇒ AD + BC is a double displacement reaction.

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Answer:

1 kg of lead occupies the smallest amount of space of the four substances

Explanation:

The densities of lead, iron, gold, and copper are 11.34 g/cm^3, 7.87 g/cm^3, 19.32 g/cm^3, and 8.96 g/cm^3, respectively. Therefore, the volumes of 1 kg of lead, iron, gold, and copper are:

Volume of 1 kg lead = 1000 g / 11.34 g/cm^3 = 87.94 cm^3

Volume of 1 kg iron = 1000 g / 7.87 g/cm^3 = 126.98 cm^3

Volume of 1 kg gold = 1000 g / 19.32 g/cm^3 = 51.93 cm^3

Volume of 1 kg copper = 1000 g / 8.96 g/cm^3 = 111.84 cm^3

As we can see, a kilogram of lead has the lowest volume of the four substances, with a volume of 87.94 cm^3. This is because lead is the densest of the four substances, which means that it has the highest mass per unit of volume. Therefore, 1 kg of lead occupies the smallest amount of space of the four substances

The volume of pure gold has a mass of 65.4g and a density of 9.3g/cm3 is   3.3886 cm3.

Solution :

∵ density = mass ÷ volume

⇒ volume = mass ÷ density

∴ volume of pure gold = (mass of gold) ÷ (density of gold)

                                      = 65.4 ÷ 19.3

  The volume of pure gold = 3.3886 cm3

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Answer:

to fall towards 7, making the solution less alkaline as more water is added.

Answer:

balance

Explanation:

Lithium has 3 protons in the nucleus.

Atomic number =number of protons =number of electrons

According to the question,

we have been given atomic number= 3

So, number of protons will be 3 and number of electrons will also be 3.

We can additionally calculate number of neutrons as follows-

number of neutrons= mass number - number of protons

                                   = 6.941 - 3

                                   ≈ 4

Hence, the number of protons in lithium will be 3.

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The nucleus of Lithium has three protons.

The number of protons or electrons in the nucleus of a neutral atom is known as its Atomic number.

The total mass of an atom's protons and neutrons is known as its mass number. (neutrons and protons added together Equals nucleons)

Atomic mass= Mass number + Neutrons

Atomic number equals the sum of the protons and electrons

Since, atomic number given is 3

Therefore, protons in the nucleus will be 3.

Additionally, we may determine the neutron number using the formula below.

mass number = number of neutrons + number of protons

⇒ 6.941 = number of neutrons + 3

⇒ number of neutrons will be approximately 4.

Thus, lithium will contain three protons.

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