What are advantages of specialization ​

Answer:

C

Explanation:

Condensation

Answer:

C....... ...................

Answer:

0.595 M

Explanation:

The number of moles of water in 1L = 1000g/18g/mol = 55.6 moles of water.

Mole fraction = number of moles of KNO3/number of moles of KNO3 + number of moles of water

0.0194 = x/x + 55.6

0.0194(x + 55.6) = x

0.0194x + 1.08 = x

x - 0.0194x = 1.08

0.9806x= 1.08

x= 1.08/0.9806

x= 1.1 moles of KNO3

Mole fraction of water= 55.6/1.1 + 55.6 = 0.981

If

xA= mole fraction of solvent

xB= mole fraction of solute

nA= number of moles of solvent

nB = number of moles of solute

MA= molar mass of solvent

MB = molar mass of solute

d= density of solution

Molarity = xBd × 1000/xAMA ×xBMB

Molarity= 0.0194 × 1.0627 × 1000/0.981 × 18 × 0.0194×101

Molarity= 20.6/34.6

Molarity of KNO3= 0.595 M

Answer:

Answer is True

I hope its help for you

have a great day

Answer:

60.1 i think

Explanation:

Answer:

[NH₃] = 14.7 mol/L

Explanation:

28 wt% is a type of concentration that indicates that 28 g of ammonia is contained in 100 g of solution.

Let's determine the amount of ammonia:

28 g . 1 mol / 17.03g = 1.64 moles of NH₃

You need to consider that, when you have density's data it is always referred to solution:

Mass of solution is 100 g, let's find out the volume

0.90 g/mL = 100 g /V

V = 100 g / 0.90mL/g → 111.1 mL

We convert the volume to L → 111.1 mL . 1 L/1000mL = 0.1111 L

mol/L = 1.64 mol/0.1111L → 14.7 M

mol/L = M → molarity a sort of concentration that indicates the moles of solute in 1L of solution

The percent composition of oxygen in beryllium nitrate, Be(NO3)2 is  72.166%.

Percent composition is very straightforward. Percent composition indicates the percentage of each element in a compound by mass. A chemical compound is made up of two or more elements.

Percent composition is important because it allows us to calculate the percentage of each element in a compound. Here, the quantity is measured in terms of grams of the elements present.

For example, if we know the mass and chemical composition of a substance, we can find out the number of moles and calculate the number of atoms or molecules in the sample.

In  Be(NO3)2 the percent composition of Beryllium (Be) is 6.775%, Nitrogenium (N) is 21.060% and Oxygenium (O) is72.166%.

Thus, The percent composition of oxygen in beryllium nitrate, Be(NO3)2 is 72.166%.

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Answer:

The transfer was essential to understand the mutation and the possibility of new, more resistant strains in microorganisms.

Explanation:

the transfer of microorganisms is based on the transfer of genetic data through conductive pathways that penetrate the membranes, called pili or genetic bridges.

These mutated genes with higher resistance are transmitted and resistance is generated in entire populations and even species.

Answer:

The International System of Units (SI) is originated in France by frenches and originally was called a metric system of measurements. It provides definitions of various units of measurement such as weight, distance, electric current, temperature, and others which is widely accepted in the different fields of science and technology.

It is the system that is extended and derived from the french metric system of measurement is accepted in 1960 by convention 44 nation of the world to use particular unit of measurement worldwide to avoid confusion.

Answer: 4.1 g of barium precipitated.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

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

Given : moles of barium = 0.030

Molar mass of barium = 137 g/mol

[tex]0.030=\frac{x}{137}[/tex]

x= 4.1 g

Thus there are 4.1 g of barium that precipitated.

Answer:

The answer is C or 3

Explanation:

I took the assignment

Answer:

3 or C on edge

Explanation:

Answer:

Chemical is best answer

Explanation:

Mark me as brilliant and thank you

Please

Answer:

chemical is the  answer

Explanation:

Answer:

NaNO₃

Explanation:

Data obtained from the question include:

Mass of sodium (Na) = 3.47 g

Mass of nitrogen (N) = 2.12 g

Mass of oxygen (O) = 7.27 g

Simplest (empirical) formula =?

The simplest formula for the salt can be obtained as follow:

Na = 3.47 g

N = 2.12 g

O = 7.27 g

Divide by their molar mass

Na = 3.47 / 23 = 0.151

N = 2.12 / 14 = 0.151

O = 7.27 / 16 = 0.454

Divide by the smallest

Na = 0.151 / 0.151 = 1

N = 0.151 / 0.151 = 1

O = 0.454 / 0.151 = 3

Simplest formula = NaNO₃

Thus, the simplest formula for the salt is NaNO₃

Answer:

the answer is B:) have a good day

Answer: 4.80 * 10¹⁴s⁻¹

Explanation:

Speed = Frequency * Wavelength

So:

Frequency = Speed/ Wavelength

Speed of light = 3 * 10⁸ m/s

Frequency = (3 * 10⁸ m/s) / (6.25 x 10⁻⁷m)

= 4.80* 10¹⁴hz

= 4.80 * 10¹⁴s⁻¹

The frequency of the electromagnetic wave is  4.8 x 10¹⁴s⁻¹

In an Electromagnetic wave, The frequency , speed and wavelength of an are related by the formula

λ=  c/f

where

λ = wavelength in metres, m.

c= speed of light  in metres per sec, m/s

f= frequency in per seconds or hertz,( s⁻¹ , Hz)

Given that Wavelength of the electromagnetic wave is 6.25 x 10-7m.

We know that speed of light is 3 x 10⁸ m/s

Substituting the values into the equation becomes

f  =  c/  λ

f= 3 x 10 ⁸m /s  / 6.25 x 10⁻⁷ m  = 4.8 x 10¹⁴s⁻¹

Hence, The frequency of the electromagnetic wave is  4.8 x 10¹⁴s⁻¹

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Answer:

B is the answer because it doesn't matches the num of valence electrons

Answer:

No, because it doesn't match the total number of valence electrons.

Explanation:

The total valence electrons should be 10. But if you add all the valence electrons it gives you 12

Answer: D.

Explanation: :)

Answer:

d

Explanation:

Answer:

In my perspective I think its D because Electrical energy is converted to light and heat

Answer:

m = 2.18x10¹⁵ tons of ice

Explanation:

To solve this exercise, we need to work with the same units of conversion. In this case let's see the conversion of every unit here:

1 mi = 5280 ft

1 ton = 1000 kg

1 kg = 1000 g

1 mL = 1 cm³

1 mi = 1609.34 m or 160,934 cm

Now that we know the units, let's analyze the data.

The landscape has a 500,000 mi² of area, this is however without including the ice. The ice is apart, and has a 7520 ft of height. And if the landscape wouldn't have ice, then the height will be 1500 ft only.

With that data, we can know the actual height of the ice by a simple difference:

Hi = Hli - Hl

Where:

Hi: Height of ice

Hli: Height of ice + landscape

Hl: Height of landscape

Applying this expression, the height of ice is:

Hi = 7520 - 1500 = 6020 ft of ice

Now that we know the height of the ice, we can calculate the volume of whole landscape. But first, let's do the conversion of foot to mile:

Hi = 6020 ft * (1 mi/5280 ft) = 1.14 mi

And now, let's calculate the volume of the landscape in mile, and then, to centimeter:

V = 1.14 mi * 500,000 mi² = 570,000 mi³

To convert the cubic mile to cubic centimeter we just do the following:

V = 570,000 mi³ * (160934 cm / 1 mi)³ = 2.38x10²¹ cm³

Now, we can get the mass of the ice using the given density of ice (d = 0.917 g/cm³)

If d = m/V  

then m = d * V

Replacing the data:

m = 0.917 g/cm³ * 2.38x10²¹ cm³

m = 2.18x10²¹ g

Finally, the tons of ice will be:

m = 2.18x10²¹ g * (1 kg / 1000 g) * (1 ton / 1000 kg)

Hope this helps

The volume of HCl = 2.10⁴ mL

Given

5.0 M(mol/L) HCl solution

3 g of Mg

Required

Volume of HCl

Solution

Reaction

Mg + 2HCl ⇒ MgCl₂ + H₂

mol of Mg (Ar=24 g/mol) :

mol = mass : Ar

mol = 3 : 24

mol = 0.125

From the equation, mol ratio of Mg : HCl = 1 : 2, so mol HCl :

= 2/1 x mol Mg

= 2 x 0.125

= 0.25

Molarity : mol solute per liters solution

M = m x V

V = M : m

V = 5 mol/L : 0.25

V = 20 L = 2.10⁴ mL

Answer:

44

Explanation:

Answer:

B.Convection

the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

Answer:

B.

Explanation:

This question is incomplete, the complete question is;

What is the heat of a reaction, in joules, with a total reaction mixture volume of 73.0 mL if the reaction causes a temperature change of 4.4 °C in a calorimeter?

Assume that the reaction mixture has a density of 1.00 g/mL and a specific heat of 4.184 J/g-oC. The calorimeter has a heat capacity of 10.0 J/oC.

Answer: the heat of the reaction is 1387.9 J

Explanation:

Given that;

Volume = 73.0 mL

density = 1.00 g/mL

specific heat of solution =  4.184 J/g-oC

calorimeter has a heat capacity of 10.0 J/oC.

Temperature change ΔT = 4.4 °C

the heat of a reaction = ?

Total heat of the reaction will be equal to the amount of heat absorbed/lost by the solution and the calorimeter.

so heat of reaction q = mC_solΔT + C_alΔT

where m is mass, C_sol is specific heat capacity of the solution, ΔT temperature change and C_cal is heat capacity of calorimeter.

so first we calculate our mass;

mass = volume × density

=  73.0 mL × 1.00 g/mL

= 73.0 g

so we substitute into our equation;

q = mC_solΔT + C_alΔT  

q = (73 × 4.184 × 4.4) + ( 10 × 4.4 )

q = 1343.9008 + 44

q = 1387.9 J

Therefore the heat of a reaction is 1387.9 J

Answer:

It is A.

Explanation:

found at ground

hope this helps

Answer:

Discovered two new radioactive elements They came up with the term radio activity.conducted experiments with uranium-containing

Explanation:

Answer:

The molecular formula of the compound is C₂H₄F₂ or CH₃CHF₂

Explanation:

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

Empirical formula of the compound = CH₂F

Fórmula mass of compound = 66 g/mol

Molecular formula of the compound =?

The molecular formula of the compound can be obtained as follow:

Molecular formula = [Empirical formula]ₙ

Molecular formula = [CH₂F]ₙ

[CH₂F]ₙ = 66

[12 + (2×1) + 19] n = 66

[12 + 2+ 19]n = 66

33n = 66

Divide both side by 33

n = 66/33

n = 2

Molecular formula = [CH₂F]ₙ

Molecular formula = [CH₂F]₂

Molecular formula = C₂H₄F₂

Thus, the molecular formula of the compound is C₂H₄F₂ or CH₃CHF₂

Answer:

Each donor gave away more than one organ.​

Explanation:

edge 2021

Answer: D

Explanation:

Answer:

Explanation:

12.9 micrograms of iodine in both

Answer:

C) 2, 4.

Explanation:

Hello!

In this case, since the sulfur atom has six electrons at its outer shell, it suggests it needs to gain two electrons in order to attain a complete octet, that is why it has 2 paired electrons.

Moreover, since two electrons are paired, then 4 electrons will remain unpaired; therefore the answer would be C) 2, 4.

Best regards!

Answer:

In static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.

Answer: Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons.

Explanation:

hopes this helps

Answer:

it's mass

Explanation:

just trust me it's just mass