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Calculate the concentration of a solution of sodium chloride if 15g are added to water to make a 200cm³ solution. The answer shoulsd be in units of g/dm³.

Answer:

525.1 g of BaSO₄ are produced.

Explanation:

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate 1 mol of barium sulfate.

The excersise determines that the excess is the  BaCl₂.

After the reaction goes complete and, at 100 % yield reaction, 2.25 moles of BaSO₄ are produced.

We convert the moles to mass: 2.25 mol . 233.38 g/mol = 525.1 g

The precipitation's equilibrium is:

SO₄⁻² (aq)  +  Ba²⁺ (aq)  ⇄  BaSO₄ (s) ↓       Kps

525.1 0 g of BaSO₄ are produced.  

The reaction of precipitation is:

Na₂SO₄ (aq) + BaCl₂ (aq) →  BaSO₄ (s) ↓  +  2NaCl (aq)

Ratio is 1:1. So 1 mol of sodium sulfate can make precipitate of 1 mol of barium sulfate.

Molar mass of [tex]BaSO_4[/tex] is 233.38 g/mol

The formula for the number of moles is as follows:-

[tex]Number\ of\ moles=\frac{Mass}{Molar\ Mass}[/tex]

[tex]Mass=2.25\ moles\times233.38\ g/mol\\=525.10\ g[/tex]

So, 525.10 g of barium sulfate be precipitated.

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Answer:

Brainliest-

Explanation:

Answer:

290.32 g

Explanation:

First we calculate the volume of the cube:

Now we convert cubic centimeters to mililiters:

Finally we calculate the mass, using the equation for density:

Answer:

The atmosphere and Earth's interior are layered by density. Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer.

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Answer:

Gravity pulls more strongly on denser materials so denser materials are at the center of things.

Explanation:

Earths core at its center is denser than its crust the lowest layer of the atmosphere is denser than the upper layer

Answer:

When a solid dissolves the solid and the liquid they form a mixture called a solution.

Answer:

I`m pretty sure it`s electrical tape.

Explanation:

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

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Answer:

6 moles

Explanation:

According to stoichiometry and given chemical equation 2C₂H₆(g)+7O₂(g)→4CO₂(g)+6H₂O(l), 9 moles of water are produced when 3 moles of ethane are burned.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.

In the given problem , as 2 moles of ethane produce 6 moles of water so according to stoichiometry

∴ 3 moles of ethane will produce 3×6/2=9 moles

Thus, 9 moles of water are produced when 3 moles of  ethane are  burned.

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Answer: Covalent

Explanation:

A covalent compound is formed when an element shares its valence electron with another element. This compound is formed between two non metals. Example: [tex]HF[/tex]

An ionic compound is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal. Example: [tex]NaCl[/tex]

Answer: 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

Explanation:

The balanced chemical equation is:

[tex]2B+3H_2\rightarrow 2BH_3[/tex]  

According to stoichiometry :

3 moles of [tex]H_2[/tex] produce = 2 moles of [tex]BH_3[/tex]

Thus 27.0 moles of [tex]H_2[/tex] will produce=[tex]\frac{2}{3}\times 27.0=18.0 moles[/tex]  of [tex]BH_3[/tex]

Thus 18.0 moles of [tex]BH_3[/tex] will be produced when 27.0 moles of [tex]H_2[/tex] completely react.

Answer:

You need to know the weight in lb of 1 apple (or how manly apples there are in a 1 lb bag of apples)

Explanation:

Option a) presents the price for unit of apple: 10 apples for $10.50. So, the price of 1 apple is calculated as $10.50/10 = $1.05

Option b) presents the price for weight of a bag of apples: 3 lb bag of apples for $5.00. So, the price for 1 lb bag of apples is $5.00/3 = $1.66/lb. But we don't know how many apples there are in a 1 lb bag.

If we knew the approximate weight in lb of an apple, we would know how many apples there are in a 1 lb bag and then we can compare with the price for unit (option b vs option a). For example, if there is 1 apple in a 1 lb bag, option b) is more expensive than option a) ⇒ $1.66/apple > $1.05/apple

Answer: 0.119 mole of Kr has a mass of 10.0 g

Explanation:

The complete Question was ontained online, albeit, it was incomplete, even from the online source. But the solution is possible based on the part of the question obtained.

Complete Question

Which of the following Noble Gases has a mass of 10.0 g?

A. 2.02 mol Ne B. 0.119 mol Kr C.

Solution

Number of moles = (Mass)/(Molar Mass)

Mass = (Number of moles) × (Molar mass)

Checking the options, one at a time,

A. 2.02 moles of Neon

Number of moles = 2.02 moles

Molar Mass of Neon = 20.1797 g/mol

Mass = 2.02 × 20.1797 = 40.762994 g ≠ 10.0 g

Not the answer.

B. 0.119 moles of Krypton

Number of moles = 0.119 moles

Molar Mass of Krypton = 83.798 g/mol

Mass = 0.119 × 83.798 = 9.971962 g ≈ 10.

Explanation:

hope this helps have a great night ❤️❤️❤️

Answer:

B. Matter is composed of very small particles.

Explanation:

All matter is composed of extremely small particles called atoms. All atoms of a given element are identical in size, mass,

The statement is true based on the kinetic theory is that; "matter is composed of very small particles.".

The kinetic theory of matter holds that the particles that compose matter are in constant random motion. In this theory, all matter is composed of molecules.

Now, the statement is true based on the kinetic theory is that; "matter is composed of very small particles.".

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Answer:

Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours.

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Answer:

45/9 or 5

Explanation:

the oil which relative amount is greater than demand is fuel oil, whose fraction is 45/9

Answer:

44.8 litres is the answer to the question

Answer:

1.Newton's first law is often called the law of inertia.

2.Newton's second law of motion is F = ma

3.An object not wanting to change its speed or direction

4.a bike would have more acceleration

5.it doesn't have auto brakes and its lighter than a motorcycle

6. Second law

7. First law

8. First law

9. Second law

10.  First law

Those should be right!

Answer:

9302 moles of CO contain 5.60×10²⁷ molecules

Explanation:

We solve this with Avogadro's number.

NA = 6.02×10²³

This number states the how many particles are in 1 mol of anything.

1 mol of atoms contains 6.02×10²³ atoms

1 mol of molecules  contains 6.02×10²³ molecules.

We apply a rule of three:

6.02×10²³ molecules are contained in 1 mol of CO

Then, 5.60×10²⁷ molecules may be contained in (5.60×10²⁷ . 1) / 6.02×10²³

= 9302 moles

Answer:

0.0345kg is the mass of 25L of the sample

Explanation:

Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.

To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:

Mass in grams:

25L * (1.38g / L) = 34.5g

Mass in kilograms:

34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample

Answer:

molar mass= 180

Explanation:

molar mass = (6×12) + (12×1) + (6×16) = 180

in a lift if an object is moving with acceleration same as acc. due to gravity then apparent weight is 0. so it seems object is weightless.

or else I dunno maybe in space

technically you will be weightless when no force acts on you

Answer:

A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow. In a balanced chemical equation, the numbers of atoms of each element and the total charge are the same on both sides of the equation.

Answer:

chemical equation and chemical reaction

Explanation:

chemical equation is the symbolic representation Of a chemical reaction in the form of symbols

Answer:

La distancia recorrida por el móvil es 228.600 m

Explanation:

El movimiento rectilíneo uniforme MRU es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir:, en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello mediante la expresión:

[tex]velocidad=\frac{distancia}{tiempo}[/tex]

En este caso:

Reemplazando:

[tex]25 \frac{m}{s} =\frac{distancia}{9144 s}[/tex]

y resolviendo obtienes:

distancia= 25[tex]\frac{m}{s}[/tex] *9144 s

distancia= 228.600 m

La distancia recorrida por el móvil es 228.600 m

A movement is rectilinear uniform when an "object" (for example) travels in a straight path at a constant speed, given that its acceleration is zero.

Velocity (v) = 25m/s

Distance (d) = ?

Time (t) = 2.54hr = 9,144 s

Looking at the data, we see that the time is in hr, but we need it in seconds. Therefore we do a conversion from hours to minutes, taking into account that 1 hour is equal to 3600 seconds.

To calculate the distance traveled by the mobile, the speed is multiplied by the time taken.

For this the following formula is applied:

We apply the data in the formula; to solve for the distance.

Answer: The distance traveled by the mobile is 228,600 meters.

Answer:

you already have the right answer b

Explanation:

Answer:

Multicellular

Explanation:

Prokaryotic cells are unicellular because the do not have a nucleus and lack organelles, while eukaryotic cells do have a nucleus, have organelles, and are are multicellular. :)

Organisms that are made up of prokaryotic cells are NOT

Multicellular.

Living organisms can be classified based on their cellular organisation.

Organisms that are made up of one cell are known as unicellular organisms.

Organisms that are made up of more than one cell are known as multicellular organisms.

A prokaryote is an organism that lacks distinct nucleus while eukaryote is an organism that possess a nucleus that is enclosed in a nuclear envelope.

While prokaryotes are always unicellular organisms, eukaryotes can be either unicellular or multicellular.

Therefore, organisms that are made up of prokaryotic cells are not multicellular.

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Answer:

8.14x6.022×10^23 ~ 4.901908x10^24

Explanation:

Answer:

Salad dressing made with oil vinegar, and herb is a homogeneous mixtures. Because heterogeneus mixture is composed of two or more components which are unequal distributed.

But in normal salad it's heterogeneous

2Na+2H2O----2NaOH+H2