A solution is made by dissolving 38.750 g of sample of an unknown, non-electrolyte compound in water. The mass of the solution is exactly 500.0 g. The boiling point of this solution is 100.220 °C.

What is the molecular weight of the unknown compound?

The concentration of the new solution, given that 2/3 of it's initial volume was boiled away is 0.758 M

We'll begin by obtaining the new volume of the solution.This can be obtained as follow:

V₂ = 1 - 0.67

V₂ = 0.33 mL

The concentration of the new solution can be obtained as follow:

M₁V₁ = M₂V₂

0.250 × 1 = M₂ × 0.33

0.250 = M₂ × 0.33

Divide both side by 0.33

M₂ = 0.250 / 0.33

M₂ = 0.758 M

From the calculation made above, we can conclude that the concentration of the new solution is 0.758 M

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The law of conservation of mass, also known as the principle of mass conservation, in physics and chemistry states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time because the mass of the system cannot change and therefore quantity cannot be added to or subtracted.

Conservation of Mass.

Antoine Lavoisier discovered in 1789 that mass is neither created nor destroyed in chemical reactions, which led to the formulation of the Law of Conservation of Mass. That is to say, the mass of any one element at the start of a reaction will be equal to that element's mass at the conclusion of the reaction. The overall mass will remain constant over time in any closed system if we take into account all reactants and products in a chemical reaction. Lavoisier's discovery transformed science and served as the cornerstone for contemporary chemistry.

Because naturally occurring elements are extremely stable under the circumstances present on the Earth's surface, the Law of Conservation of Mass is valid. The majority of elements are created in stars and supernovae through fusion processes. Therefore, atoms do not change into other elements during chemical reactions in the ordinary world of Earth, from the top of the tallest mountain to the bottom of the deepest ocean. As a result, each atom that makes up life and nonliving stuff is extremely old and has a past.

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Answer:Composition. Jupiter, Saturn, Uranus and Neptune collectively make up the group known as the jovian planets. The general structures of the jovian planets are opposite those of the terrestrial planets.

Explanation:

The mass of ether produced is 111.5 g.

Let us recall that a chemical reaction is said to have occurred when there is an interaction between reactants that leads to the formation of products. Usually, a given percentage of the reactants is always converted into products.

Now;

2[tex]CH_{3} CH_{2} OH[/tex](l) → [tex]CH_{3} CH_{2}OCH_{2}CH_{3}[/tex](l) + [tex]H_{2} O[/tex](l)

Number of moles of ethanol reacted = 207 g /46 g/mol

= 4.5 moles

If 2 mole of ethanol produced 1 mole of diethyl ether

4.5 moles of ethanol produced 4.5 moles *  1 mole/2 mole

= 2.25 moles

Theoretical yield of diethyl ether = 2.25 moles  * 74 g/mol = 166.5 g

We now have to find the actual yield hence;

66.7 = actual yield /166.5 * 100

actual yield  = 66.7 * 166.5/100

= 111.5 g

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When studying quantum mechanics, the de Broglie wavelength is a key idea. De Broglie wavelength is the wavelength () that is connected to an item in relation to its momentum and mass.

Typically, a particle's force is inversely proportional to its de Broglie wavelength.

Assuming that the smallest measurable wavelength in an experiment is 0.830 fm , what is the maximum mass of an object traveling at 171 m⋅s−1 for which the de Broglie wavelength is observable?

We know:

According to the following equation, an object's de-Broglie wavelength solely depends on its momentum:

λ = h/p = h/m*v, where,

By rearranging the above equation, the object's mass can be written as:

        m = h/λv

The maximum mass and the minimum de Broglie wavelength of the item are inversely correlated because the two quantities are inversely proportional to one another. When we enter the values provided, we get:

        m = {6.626×10^(−34) J⋅s} / {0.330 fm × 157 m/s}

            ≈ 1.28×10^(−20) kg

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The name of each of the following ionic substances , using -ous or -ic endings to indicate the charge of cation.

                               cationic name

(a)   CoCl₂               Cobaltous chloride

(b)   CrBr₃                 Chromic Bromide

(c)  PbO                   Plumbous oxide

(d) SnO₂                   Stannic Oxide

(e) Fe₂O₃                  Ferric oxide

(f) FeCl₃                    Ferric Chloride

we use suffix -ous and -ic  to represent the cation charges. it is called as cationic naming . we use -ic for greater charges (greater of 2 cation) and  -ous  suffix for the lower ones.

thus, the ionic compound s , cationic naming's are :

(a)   CoCl₂                Cobaltous chloride

(b)   CrBr₃                Chromic Bromide

(c) PbO                   Plumbous oxide

(d) SnO₂                   Stannic Oxide

(e) Fe₂O₃                  Ferric oxide

(f) FeCl₃                    Ferric Chloride

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Answer:

11

Explanation:

Write an argumentative essay on "The Importance Of Homework.

The empirical formula of the oxide formed, given that 0.2 g of S reacts completely with 0.2 g of O is SO₂

The following data were obtained from the question:

The empirical formula of the oxide formed can be obtained as follow:

Divide by their molar mass

S = 0.2 / 32 = 0.00625

O = 0.2 / 16 = 0.0125

Divide by the smallest

S = 0.00625 / 0.00625 = 1

O = 0.0125 / 0.00625 = 2

From the calculations made above, we can conclude that the empirical formula of the oxide formed is SO₂

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931 g of nitric acid is required to react with 454 g of C₇H₈ in the reaction between them.

It refers to the relation between the amount of reactants and products. It is a quantitative study concerned with mainly numbers.It helps in utilizing the balanced chemical equations for calculating the quantity of reactants and products.

The reaction between nitric acid and C₇H₈ takes place as follows:

C₇H₈+3 HNO₃ [tex]\rightarrow[/tex]C₇H₅N₃O₆+ 3 H₂O

1 mole of C₇H₈ reacts with 3 moles of nitric acid .454 g of C₇H₈ are converted to moles using molar mass and then it's related with moles of C₇H₈ and moles of nitric acid .Then, the moles of nitric acid are converted to grams

454 g C₇H₈×1 mole C₇H₈/92.14 g ×3 moles nitric acid/1 mole C₇H₈×63.01 g nitric acid/ 1 mole nitric acid=931 g

Thus, 931 g of nitric acid is required to react with 454 g C₇H₈.

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From lack of Oxygen (a) less ATP is produce.

Aerobic means the process which require the oxygen. Anaerobic means process without oxygen. when cellular respiration takes place aerobically ( in the presence of oxygen ) , glucose react with oxygen form ATP this can be used by cell, and by product is water and carbon dioxide.

C₆H₁₂O₆   +   6O₂    ---------->    6CO₂   +   6H₂O   +  ATP

To learn Without the presence of oxygen very less ATP is produced. In the absence pf oxygen ,glucose is breaks down into the alcohol and carbon dioxide with release of energy.

Thus, From lack of Oxygen (a) less ATP is produce.

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1. The volume of 44 g of N₂ at STP is 35.2 L

2. The volume of 0.25 mole of NH₃ at STP is 5.6 L

1 mole of gas = 22.4 L

1 mole of N₂ = 22.4 L at STP

But

1 mole of N₂ = 28 g

Thus, we can say that,

28 g of N₂ = 22.4 L at STP

Therefore,

44 g of N₂ = (44 × 22.4 L) / 28 g

44 g of N₂ = 35.2 L

Thus, 44 g of N₂ has a volume of 35.2 L at STP

1 mole of NH₃ = 22.4 L at STP

Therefore,

0.25 mole of NH₃ = (0.25 × 22.4 L) / 1 mole

0.25 mole of NH₃ = 5.6 L

Thus, 0.25 mole of NH₃ has a volume of 5.6 L at STP

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Question: Hello: ) ✨ what is the furthest planet from the sun and closest to the earth ?

Answer: Neptune is the furthest planet from the Sun in our Solar System but there are dwarf planets further out, notably Pluto. Pluto's orbit is a much more elongated ellipse than those of the other planets, so for 20 years out of its 249-year orbit, it is in fact closer to the Sun than Neptune.

Explanation:

In order of distance from the sun they are; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto, which until recently was considered to be the farthest planet, is now classified as a dwarf planeYou might think that the farthest planet from the Sun, or Earth, is Neptune since Neptune is 30 AU or 4.5 billion km / 2.8 billion mi away from us. However, it is actually Pluto who is the farthest planet from the Sun.

Have an awesome Day/Night<3

Answer:

Neptune is the farthest planet from Sun.

Explanation:

Pluto is a dwarf planet therefore it isn't Pluto.

Answer:

Below

Explanation:

I1-

Te2-

Ba2+

Cs1+

The broadcast wavelength of the radio station 100.7 FM is 2.979 m

The frequency and wavelength of a wave are related according to the following equation

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can obtain the wavelength. Details below.

From the question given above, the following data were obatained:

We can obtain the wavelength as follow:

v = λf

3×10⁸ = λ × 100.7×10⁶

Divide both sides by 100.7×10⁶

λ = 3×10⁸ / 100.7×10⁶

λ = 2.979 m

Thus, the wavelength of the radio station is 2.979 m

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Answer:

It came from the soft drink being frozen.

Explanation:

When a drink gets frozen it expands and it causes the can to split open

The volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

The volume of a substance can be calculated by dividing the mass of the substance by its density as follows:

Volume = mass ÷ density

According to this question, the density of ethanol is 0.789 g/cm³. A flask holds 165.0 g of ethanol and the volume can be calculated as follows:

Volume = 165.0g ÷ 0.789g/cm³

Volume = 209.13cm³

Therefore, the volume of the ethanol that has a density of ethanol is 0.789 g/cm³ is 209.13cm³.

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According to the question, the declaration that best illustrates the cart is as follows:

Thus, the correct option for this question is C.

Velocity may be defined as a type of vector quantity that significantly determines the rate of alteration of the position of an object with respect to time.

According to the context of this question, the cart was migrating at a persistent velocity as a straight line which is significantly mentioned in the graph given above.

The rate through which the location and position enhance is directly proportional to the time. For example, when time increases, the distance or position also increases. So, it was migrating at a persistent velocity.

Therefore, the correct option for this question is C.

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Answer:

Five

Explanation:

7 is a significant number and so is 3, 1, and 5.

In this case, 0 comes AFTER the usual significant numbers, therefore, it is also a significant number.

It’s ‘x’

’x’ only appears once

Answer: The answer for this question is 1.9 milliliters

Explanation: So the V=Bh and I substituted the v for 19.45 since they gave use the volume and the h for the amount water we have and then I divided in a calculator and 1.925742574 and then I rounded to the nearest tenth and got 1.9 cm^3

Hope this helps :D

Hydrogen quickly can not pressurized steel cylinders because" The low volumetric energy density of hydrogen makes storage a challenge. Since it would be the lightest and most basic element, it is even lighter that helium it is quickly lost in the environment."

A very minor hydrogen leak could occur if hydrogen interacts with the metal or passes completely through to the outside surface. Metal's mechanical characteristics deteriorate when hydrogen is present in the metal's lattice (e.g., fatigue as well as fracture resistance). Hydrogen embrittlement would be a phenomenon (HE).

Intensifying the density and adding additional gas to the tank are two effects of cooling compressed hydrogen gas. Liquid nitrogen was frequently used to chill the system down to 77 K, which triples its volumetric capacity when compared to uncooled hydrogen.

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The [OH] of the given solution is  0.000000000043652 M and the pH of the solution is equal to 3.36.

Given in the question

Concentration of the Hydronium Ion=  [H+] =  0.00043 M

We know that,

pH is a figure that uses a logarithmic scale with 7 as neutral, where lower values are more acidic and higher values are more alkaline, to represent the acidity or alkalinity of a solution. The hydrogen ion concentration (c), expressed in moles per liter, determines the pH, which is equal to -log10(c).

So the pH of the given solution is

pH = -log10[0.00043]

pH = -(-3.36)

pH = 3.36

So the pH of the given solution is 3.36.

We know that at 25 °C, the sum of pH and pOH of the solution is equal to the 14

pH + pOH = 14

Put in the values, we get

3.36 + pOH = 14

pOH = 14 - 3.36

pOH = 10.64

Now, the pOH of the solution is given by  -log10[OH].

Put in the values, we get

-log10[OH] = 10.36

Taking antilog on both sides, we get

[OH] = 0.000000000043652 M

Therefore, the [OH] = 0.000000000043652 M and pH =  3.36.

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Answer:

Many of the atomic masses listed on the periodic table are decimal values because it's the weighted average mass of all of the isotopes of that element. The mass of each isotope of an element is multiplied by its percent abundance in nature

Answer:

it's liquid

Explanation:

because liquid has no shape as it travels and cannot be stopped

The acceleration of an ice cream pulled across a table with a force of 40N is 8m/s².

The acceleration of a moving body can be calculated by dividing the force by the mass of the body as follows:

Acceleration = Force ÷ mass

According to this question, a 5kg of ice cream is pulled across a table with a force of 40N. The acceleration can be calculated as follows:

Acceleration = 40N ÷ 5kg

Acceleration = 8m/s²

Therefore, the acceleration of an ice cream pulled across a table with a force of 40N is 8m/s².

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There are five Family on the periodic table that are alkali metals , Alkaline earth metals , transition metals , Halogens family and noble gas family.

1) In alkali metals, there are six elements are present and among all the elements Sodium metal should be selected. Because sodium metal is most abundant metal in the world.

2) In alkaline earth metal family, The magnesium element should be selected.

3) In Halogens gas family , chlorine should be selected.

4) In transition metals , copper metal should be choose.

5) In noble gas elements, The helium gas should be selected

These are the daily life usage of all the elements of each family of the periodic table.

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The price of gas in Paris is 1.29 euro per liter . the price of gasoline in dollars per gallon is 6.1039 dollar per gallon.

The price of gas in Paris = 1.29 euro per liter.

we have to convert this in dollar per gallon,

it is given that ,

1 euro is equal to = 1.25 dollar

also, in one liter =0.264172 gallons

now, conversion to dollar per gallons are :

1.29 euro per liter =  (1.29 × 1.25 ) / 0.264172 dollars per gallon

                             =  1.6125 / 0.264172 dollars per gallon

                             =  6.1039 dollars per gallon

Thus,The price of gas in Paris is 1.29 euro per liter . the price of gasoline in dollars per gallon is 6.1039 dollar per gallon.

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Answer:

It should be city c.

Explanation:

The participation in a polar climate would have to be high, while the annual temp should be lower than many other options.

City c will experiences a polar climate. Therefore, the correct option is option C among all the given options.

Climate is a region's averaged long-term weather pattern over a period of time, usually 30 years. More precisely, it is the average and variation of climatic variables over a period of time that can range from a few months to many millions of years. Temperature, humidity.

In a larger sense, climate refers to the interactions between the atmosphere, the hydrosphere, cryosphere, lithosphere, and biosphere, which together make up the climate system. A location's latitude, longitude, topography, altitude, land use, and proximity to water bodies & their currents all have an impact on the climate there. City c will experiences a polar climate.

Therefore, the correct option is option C.

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Useful material means material that still has useful physical, chemical, or biological properties after serving its original purpose(s) or function(s), and which, when separated from solid waste, is suitable for use in the same or other purpose(s).