Hiya if you answr more than 5 = extra points please answer and least 3 lol and maybe explain how i can do it

A water bath can be used to keep the temperature of the conical flask and its contents at a temperature .

This is a laboratory equipment which contains a heated source and  is used to incubate samples in water at a constant temperature over a period of time.

This is why water bath will be best used to keep the temperature of the conical flask and its contents at a temperature of 45 °C throughout the reaction.

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The osmotic pressure at 65 °C of an aqueous solution containing 2.50 g of sucrose is 0.988 atm

Mole = mass /molar mass

Mole of sucrose = 2.5 / 342

Mole of sucrose = 0.0073 mole

Molarity =?

Molarity = mole / Volume

Molarity of sucrose = 0.0073 / 0.205

Molarity of sucrose = 0.0356 M

π = iMRT

π = 1 × 0.0356 × 0.0821 × 338

π = 0.988 atm

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Electric charges flow through connection wires to constitutes electric current which supplie the generator.

An electric generator are used to generate electricity, they converts mechanical energy to form electricity.

Electric charges are available in the wire will winds through an external electric circuit to generate electricity.

Electric charges flow through this wires to constitutes electric current which supplies the generator.

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Combination Reaction.

Explanation:

Answer:

UV/Vis spectroscopy is routinely used in analytical chemistry for the quantitative determination of different analytes, such as transition metal ions, highly conjugated organic compounds, and certain biological macromolecules. Measurement is usually carried out in solution.

Explanation:

[tex]\qquad \qquad\huge \underline{\boxed{\sf Answer}}[/tex]

Here's the solution ~

[tex]\qquad \sf  FeCl_3 + 3 \: NaOH \dashrightarrow Fe(OH)_3 + 3 \: NaCl[/tex]

When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.

Stoichiometry is the study of the quantitative relationships or ratios between two or more substances undergoing a physical change or chemical change.

Let's consider the following balanced equation.

N₂ + 3 F₂ ⇒ 2 NF₃

To calculate the mass of NF₃ formed from 32.0 g of F₂, we need to consider the following relationships.

[tex]32.00gF_2 \frac{1molF_2}{38.00gF_2} \frac{2molNF_3}{3molF_2} \frac{71.00gNF_3}{1molNF_3} = 39.86gNF_3[/tex]

When 32.0 g of F₂ react with enough N₂, 39.86g of NF₃ are formed.

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[tex]\\ \rm\Rrightarrow E=h\nu[/tex]

[tex]\\ \rm\Rrightarrow E=6.626\times 10^{-34}\times 9.68\times 10^{19}[/tex]

[tex]\\ \rm\Rrightarrow E=64.1\times 10^{-15}J[/tex]

[tex]\\ \rm\Rrightarrow E=641\times 10^{-16}J[/tex]

[tex]\\ \rm\Rrightarrow E=641eV[/tex]

Answer:

6400 molecules / cm^3

Explanation:

10.6*10^-16 mol/L * 6.022*10^23 molecules/mol * 1 L / 1000 cm^3 * 1 / 100 L = 6400 molecules / cm^3

The "natural" equilibrium concentration of Nitric oxide in air in units of molecules/cm .0.062molecules/cm3

chemical equilibrium or equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction. At the same time, there is no change in the products and reactants, and it seems that the reaction has stopped.

The equation for Beer's law is a straight line with the general form of y = mx +b. where the slope, m, is equal to εl. In this case, use the absorbance found for your unknown, along with the slope of your best fit line, to determine c, the concentration of the unknown solution.

Reversible reactions occur until equilibrium is established, meaning that they achieve a sort of balance between amounts of reactant and product. If the reactants and products are equal in energy, at equilibrium, they will have the same concentration.

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#SPJ2

Answer:

liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.

Explanation:

The formula equation for the reaction between zinc sulfide and magnesium arsenate is

3ZnS + Mg₃(AsO₄)₂ → Zn₃(AsO₄)₂ + 3MgS

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Zinc sulfide => ZnS

Magnesium arsenate => Mg₃(AsO₄)₂

Zinc arsenate => Zn₃(AsO₄)₂

Magnesium sulfide => MgS

Zinc sulfide + Magnesium arsenate → Zinc arsenate + Magnesium sulfide

3ZnS + Mg₃(AsO₄)₂ → Zn₃(AsO₄)₂ + 3MgS

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Answer : D. pOH = 12

solutions turns litmus papers to red : acidic (pH<7)

pH + pOH = 14

A. pOH = 3, pH = 11, alkaline

B. [OH⁻] = 1 x 10⁻⁷ ⇒ pOH = - log [OH⁻]= 7, pOH = pH = neutral

C. [OH⁻] = 1 x 10⁻⁵ ⇒ pOH = - log [OH⁻]= 5, pH = 9, alkaline

D. pOH = 12, pH = 2, acidic

Answer:

d

Explanation:

ph is acid

acid litmus paper converts to red in acidic media

Answer:

The use of post-consumer polyolefins is increasing due to the pledges of multiple organizations to use higher concentrations of recycled materials in packaging. However, direct food contact applications are challenging with various regulations around the world mandating minimum safety requirements, which is often determined by the condition of use (microwave, cold storage) and food type (fatty, aqueous, dry). This article reviews different predictive models that have been developed to study contaminant migration from packaging to food contact articles. It also examines multiple techniques and methods that have been employed to quantify and assess to the safety of recycled materials (e.g., United States and Europe) which serve as a base for the regulatory framework for many other countries. The presence of different contaminants during polymer processing is also discussed due to potential problems from the presence of harmful compounds affecting human health or degradation of material properties.

Based on the data provided, at equilibrium, the concentration of Ni2+ that remains is 4.268 ×10^-6 M

The molar concentration of a solution is the amount in moles of solute dissolved in a given volume of solution in litres.

Total volume of solution after mixing = 110 + 200 = 310 mL

Concentration of Ni2+ = 0.0133M/( 310ml/110ml) = 0.00472M

Concentration of NH3 = 0.250M/(310ml/200ml) = 0.1613 M

Assuming complete formation of Ni(NH3)6, the equation of formation is given as:

From equation of the reaction, 1 mole of Ni2+ reacts with 6 moles of NH3 to produce 1 mole of Ni[(NH3)6]2+

Then,

0.00472 M of Ni2+ react with 0.02832 M of NH3 to give 0.00472 M of Ni2+

Concentration of remaining NH3 = 0.1613 M - 0.02832M = 0.13298 M

The equation of dissociation at equilibrium of Ni(NH3)62+ is given as:

Kd = [Ni2+][NH3]6/[Ni(NH3)6]

Kd = 1/Kf = 1/ 2.0 × 10^8

Kd = 5.0 ×10^-9

Using an ICE chart;

Initial concentration:

[Ni(NH3)62+] = 0.00472

[Ni2+] = 0

[NH3] = 0.

Change in concentration:

[Ni(NH3)62+] = - x

[Ni2+] = + x

[NH3] = + 6x

Equilibrium concentration:

[ Ni(NH3)62+] = 0.00472 - x

[Ni2+] = x

[NH3] = 0.13298 + 6x

From the dissociation constant equation;

x(0.1330 + 6x)^6 / 0.00472 - x) = 5.0 ×10^-9

Assuming x is very small;

x( 0.13298)^6/ 0.00472 = 5.0 ×10^-9

x × 0.00117= 5.0 ×10^-9

x = 4.268 ×10^-6 M

Therefore, at equilibrium, the concentration of Ni2+ that remains is 4.268 ×10^-6 M

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Answer:

During the eclipse season, the Moon is at a low ecliptic latitude (less than around 1.5° north or south), hence the Sun, Moon, and Earth become aligned straight enough (in syzygy) for an eclipse to occur.

Explanation:

Answer:

dinitrogen trioxide = N2O3

nitrogen monoxide =  NO

hydrochloric acid = HCl

chloric acid = HClO3

sulfuric acid = H2SO4

sulfurous acid = H2SO3

Answer:

may I know the directions?

Explanation:

pls put a deroction

a. 2-methyl-2-propanol

b. 2-butene 1-ol

c. 3-methyl 2-butanol

d. 3-methyl 2-pentanol

Explanation:

this equation is balanced

if you look at it carefully

k=1

f=1

o=2

we do not have any opposing element

Answer:

this equation is balanced

if you look at it carefully

k=1

f=1

o=2

we do not have any opposing element

Answer:

100%

Explanation:

since both genotypes are dominant, and one of them is YY, all of the offspring will be yellow.

Answer:

Ethyl

Explanation:

Answer:

thermal energy.

Explanation:

Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.

Answer:

O Continental-continental convergent boundary

Explanation:

Hope it helps.