Calculate the molarity when 3.55 moles of NaCl are dissolved to make 0.200 L of solution

The pure form of an atom present in a sample is called the element. No, elements are not always the product of the decomposition reaction.

Decomposition is a chemical reaction in which the compound or the molecule breaks to produce two or more products. The general reaction can be given as,

[tex]\rm XY \rightarrow X+ Y[/tex]

And,

[tex]\rm compound \rightarrow element + element[/tex]

The splitting of metal hydroxide into the water and metal oxide is an example of a decomposition reaction. Elements can be found in the free state.

Therefore, the statement is incorrect.

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Answer:

can you answer mine i will help you! please

Explanation:

Answer:

0.120M is the concentration of the solution

Explanation:

Assuming the mass of sodium nitrate dissolved was 2.552g

Molar concentration is an unit of concentration widely used in chemsitry defined as the moles of solute (In this case NaNO3) in 1L of solution.

To find this question we must find the moles of NaNO3 in 2.552g. With this mass and the volume (250mL = 0.250L) we can find molar concentration as follows:

Moles NaNO3 -Molar mass: 84.99g/mol-

2.552g * (1mol / 84.99g) = 0.0300 moles NaNO3

Molar concentration:

0.0300 moles NaNO3 / 0.250L =

Answer:

angle

Explanation:

let us see the sun moves an a angle

Answer:

Re: Most likely charge for ions. Group 1 elements generally have a charge of +1 when they form ions, Group 2 has a charge of +2, Group 13 has a charge of +3. Group 17 has a charge of -1, Group 16 has a charge of -2, Group 15 has a charge of -3. So Rb would be +1, Ga would be +3, and S would be -2.

Explanation:

Answer:

C

Explanation:

Wavelengths and frequency can vary inversely to produce the same wave speed

Answer:

C) Wavelengths and frequency can vary inversely to produce the same wave speed.

Explanation:

edge

Based on this information,  air​ has the lowest density. Therefore, the correct option is option D.

The substance's mass every unit of volume is known as its density. Although the Roman letter D may also be used, the sign most frequently used for density.  Density is calculated mathematically by dividing mass by volume.

Where m is the mass, V is the volume, and is the density. Density is sometimes roughly characterized as weight every unit volume, while this is incorrect technically; this quantity is much more precisely known as specific weight.  Air​ has the lowest density.

Therefore, the correct option is option D.

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In a chemical reaction, the very same atoms were present both in the reactants and products, but they are reorganised as a result of the reaction.

Opposition against an influence, force, or movement. preference for an antiquated political, social, and policy system, in particular. a response to a certain process, situation, or stimulus. She was shocked by the information. Substances are made up of chemical compounds and chemical constituents.

Due to forces, an item will either be in rest or moving. Consider a football that is motionless and resting just on ground as an example.

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The answer is A) 1 x 10-8 M.

Answer:

Methane is made up discrete molecules hence it adopts a simple molecular structure with weak vanderwaals forces of attraction while Silicon dioxide adopts a giant covalent structure with strong silicon to oxygen bonds.

Hence Silicon dioxide has a high melting point than methane.

Answer:

NMIKCORQW

J3WEFONCIONV WEJFQOMS;DX

Answer:

You meant binary compounds ryt?

Then,

Binary compounds are chemical compounds comprising of two distinct elements

Answer:

Answer:

Strait.

Explanation:

After a fast online search, I've found that the list of words are:

Athens

Age of Pericles

satraps

tyrant

Cyrus the Great

hoplites

Parthenon

peninsula

upper-class Athenian women

strait

Well, the definition is:

"A narrow body of water with land on both sides"

This is something like a river, so we need to find which one of these words means something like river.

To do it, let's look at short definitions of each word:

Athens: This is the capital city of Grece. (Isn't the correct option)

Age of Pericles:  This refers to a historical period (isn't the correct option)

Satraps: Were governors in the Persian empire (Isn't the correct option)

Tyrant: Refers to a cruel leader (Isn't the correct option)

Cyrus the Great: Was the founder of the Achaemenid Empire (isn't the correct option)

Hoplites: A citizen-soldier (isn't the correct option)

Parthenon: A construction in Grece (isn't the correct option)

Peninsula: A small body of land surrounded mostly by water, but connected to land (isn't the correct option)

upper-class Athenian women: It is self-explained, this isn't the correct option.

Strait: This refers to a narrow passage of water that connects two larger areas of water (like two seas, for example)

Then this one is the correct option.

Answer: There is 125 mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution

Explanation:

Given: [tex]M_{1}[/tex] = 2.0 M,      [tex]V_{1}[/tex] = ?

[tex]M_{2}[/tex] = 0.5 M,       [tex]V_{2}[/tex] = 500 mL

Formula used to calculate the volume is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\2.0 M \times V_{1} = 0.5 M \times 500 mL\\V_{1} = 125 mL[/tex]

Thus, we can conclude that there is 125 mL of a 2.0 M [tex]CuCl_{2}[/tex] solution are needed to make 500 mL of a 0.5 M solution.

Answer:

I'm going to assume by "tool", you mean the tool best used to measure each factor:

Mass-Tool: scale, Unit: kilogram (kg)

Length-Tool: ruler, Unit: meter (m)

Volume of a regular solid-Tool: equations (there really isn't a physical tool to measure volume of a solid), Unit: cubic meters (m^3)

Volume of a liquid or irregular solid-Tool: beaker, Unit: Milliliters (mL)

Melting and boiling point-Tool: thermometer, Unit: Celsius (C)

Hope this managed to help!

P2O : Summary

Code P2O

Molecule name 3-PROP-2-YN-1-YL-1,3-OXAZOLIDIN-2-ONE

Synonyms 1-(PROP-2-YNYL)-OXAZOLIDINE-2-ONE

Systematic names Program Version Name ACDLabs 10.04 3-prop-2-yn-1-yl-1,3-oxazolidin-2-one OpenEye OEToolkits 1.5.0 3-prop-2-ynyl-1,3-oxazolidin-2-one

Answer: 0.018 M

Explanation:

Answer:

33.2 moles y 1994 gramos.

Explanation:

¡Hola!

En este caso, dado que es posible para nosotros relacionar moles con gramos por medio de la masa molar y moléculas con moles por medio del número de Avogadro, resulta factible para nosotros primero calcular las moles en las moléculas dadas y de esta manera luego calcular los gramos, teniendo en cuenta una masa molar de 60.05 g/mol ya que el vinagre se puede estudiar como ácido acético (CH3COOH):

[tex]2x10^{23}molec*\frac{1mol}{6.022x10^{23}molec}=33.2mol[/tex]

Seguidamente, calculamos los gramos:

[tex]33.2mol*\frac{60.05g}{1mol}=1994g[/tex]

¡Saludos!

Answer:

C) xylem

Explanation:

Answer:

Earthquakes

Explanation:

Answer:

[tex]P \approx 225atm[/tex]

Explanation:

From the question we are told that:

Moles of sample n=3.20_mol

Volume V=350mL

Temperature T=300k

Generally the equation for ideal gas is mathematically given by

 [tex]PV=nRT[/tex]

 [tex]P=\frac{nRT}{V}[/tex]

 [tex]P=\frac{3.20*0.08206*300}{350*10^{-3}}[/tex]

 [tex]P=225.079atm[/tex]

 [tex]P \approx 225atm[/tex]

Answer:

The empirical formula of the compound is [tex]C_{0.504}HO_{1.008}[/tex].

Explanation:

We need to determine the empirical formula in its simplest form, where hydrogen ([tex]H[/tex]) is scaled up to a mole, since it has the molar mass, and both carbon ([tex]C[/tex]) and oxygen ([tex]O[/tex]) are also scaled up in the same magnitude. The empirical formula is of the form:

[tex]C_{x}HO_{y}[/tex]

Where [tex]x[/tex], [tex]y[/tex] are the number of moles of the carbon and oxygen, respectively.

The scale factor ([tex]r[/tex]), no unit, is calculated by the following formula:

[tex]r = \frac{M_{H}}{m_{H}}[/tex] (1)

Where:

[tex]m_{H}[/tex] - Mass of hydrogen, in grams.

[tex]M_{H}[/tex] - Molar mass of hydrogen, in grams per mole.

If we know that  [tex]M_{H} = 1.008\,\frac{g}{mol}[/tex] and [tex]m_{H} = 0.2\,g[/tex], then the scale factor is:

[tex]r = \frac{1.008}{0.2}[/tex]

[tex]r = 5.04[/tex]

The molar masses of carbon ([tex]M_{C}[/tex]) and oxygen ([tex]M_{O}[/tex]) are [tex]12.011\,\frac{g}{mol}[/tex] and [tex]15.999\,\frac{g}{mol}[/tex], then, the respective numbers of moles are: ([tex]r = 5.04[/tex], [tex]m_{C} = 1.2\,g[/tex], [tex]m_{O} = 3.2\,g[/tex])

Carbon

[tex]n_{C} = \frac{r\cdot m_{C}}{M_{C}}[/tex] (2)

[tex]n_{C} = \frac{(5.04)\cdot (1.2\,g)}{12.011\,\frac{g}{mol} }[/tex]

[tex]n_{C} = 0.504\,moles[/tex]

Oxygen

[tex]n_{O} = \frac{r\cdot m_{O}}{M_{O}}[/tex] (3)

[tex]n_{O} = \frac{(5.04)\cdot (3.2\,g)}{15.999\,\frac{g}{mol} }[/tex]

[tex]n_{O} = 1.008\,moles[/tex]

Hence, the empirical formula of the compound is [tex]C_{0.504}HO_{1.008}[/tex].

Explanation:

(Climate, Weather) is an overall atmospheric condition of a place of 30 years and more while (Climate,Weather) is a condition for a short period of time.

2. (Climate, Weather) is influenced by latitude, altitude, ocean current, and topography.

3. The (higher, lower) the altitude, the (colder, warmer) the climate.

4. (Windward, Leeward) area of the mountain forms precipitation while (Windward,Leeward) gives dry air and warm weather.

5. Ocean currents bring (cold, warm) water and rain from the equator to the poles and (cold, warm) water from the poles toward the equator

Answer: The volume of nitrogen gas at STP is 44.8 L.

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation for it follows:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]                    ...(1)

We are given:

Given mass of [tex]NaN_3[/tex] = 130.0 g

Molar mass of [tex]NaN_3[/tex] = 65.01 g/mol

Using equation 1:

[tex]Moles of NaN_3=\frac{130.0 g}{65.01g/mol}=2mol[/tex]

For the given chemical equation:

[tex]2NaN_3(s) \rightarrow 2Na(s) + 3N_2(g)[/tex]

By the stoichiometry of the reaction:

2 moles of [tex]NaN_3[/tex] produces 3 moles of nitrogen gas

At STP:

1 mole of a gas occupies 22.4 L of volume

So, 2 moles of nitrogen gas will occupy [tex]=\frac{22.4L}{1mol}\times 2mol=44.8L[/tex] of volume

Hence, the volume of nitrogen gas at STP is 44.8 L.

Answer: The statement, atoms in the sand were moving more quickly best describes why the  temperature of the sand increased.

Explanation:

As Sun rises in the morning everyday and the heat energy radiations given by the Sun falls on a number of objects on our surroundings. As a result, the objects absorb this heat energy till afternoon due to which they become hot.

Hence, atoms of the objects gain kinetic energy due to which they move quickly. This shows that the temperature of the object (sand here) increases.

When Maria walked in the same area in the afternoon, the sand was hot as its particles have gained kinetic energy due to which they move rapidly from one place to another. Hence, sand feels more hot in the afternoon in the same area where she walked.

Thus, we can conclude that the statement the atoms in the sand were moving more quickly best describes why the  temperature of the sand increased.

Answer:

When CO2 levels become excessive, a condition known as acidosis occurs. This is defined as the pH of the

blood becoming less than 7.35. The body maintains the balance mainly by using bicarbonate ions in the

blood. As the body responds to neutralize this condition, an electrolyte imbalance – an increase of plasma

chloride, potassium, calcium and sodium, can occur.