What volume (mL) of 0.250 M HNO3 is required to titrate (neutralize) a solution containing 0.276 g of KOH?

Answer:

3, 9, 3

Explanation:

The coefficient of 3 tells us that there are three molecules (the chemical unit of NH3). Each molecule of ammonia (NH3) is made up of 1 atom of nitrogen bonded to 3 atoms of hydrogen.

Since there are three molecules, we have three times the amount of atoms there are in one molecule.

3 x 1 = 3 nitrogen

3 x 3 = 9 hydrogen

Answer:

is there anyway u could ut it in diffrent words i do not unders stand

Explanation:

Answer:

I'd say it would be; A. Faster in Bath 1 as molecules collide more frequently in Bath 1 than Bath 2

Explanation:

I'm currently taking the FLVS exam... If I get it wrong then I'll edit asap!

Yep! I got it right. I'll provide a screenshot...

Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. ... In water waves, energy is transferred through the vibration of the water particles.

sulfide mineral is made of from metal and sulfphur

Sulfide, also written sulphide, is a category of chemicals that contain sulfur and one or more metals. The majority of sulfides have basic structural characteristics, great crystallographic symmetry, and numerous metal-like characteristics, such as metallic lustre and electrical conductivity.

Sulfides include, for instance, chalcopyrite, galena (the primary ore mineral for lead and silver), and cinnabar (the primary ore mineral for mercury) (which provides copper).

Sulfide minerals are composed of sulfur and one or more metals; sulfarsenides have some of the sulfur replaced with arsenic.

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Remember that

#1

Carbon is present so it's covalent

#2

#3

#4

#5

The mass of the object of density 5g/cm³ and volume 10 cm³ is 50kg.

Defining density How tightly a material is packed together is determined by its density. Its definition is "mass per unit volume". D or, the symbol for density

Density Formula: = m/V,

where is the density, m is the object's mass, and V is its volume.

The units used change depending on the calculation's use of mass and volume units. Density would be expressed in kg/cm³ if the mass is expressed in kg and the volume in cm³.

Density = mass / volume

Mass = density ×  volume

Mass =  5×10

Mass = 50 kg.

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Hydrogen bromide

Basicity (pKb) ~23

mark me as brainliest

#◌⑅⃝●♡⋆♡Nåmřāthā ♡⋆♡●⑅◌

Answer:

what is the question exactly because there is no question and I don't know what you are exactly looking for

Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

Answer:

ok

Explanation:

Answer:

I believe it would be C, The number of atoms in the reactants is equal to the number of atoms composing the products

Explanation:

hope this helps! :D

have a miraculous day!! <3

Answer:

The number of atoms in the reactants is equal to the number of atoms composing the products

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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answer: c- new knowledge showed that the exact location of electrons can not be known.

Explanation: i just did it ;)

Answer: Al₂O₃

Explanation:

Answer:

\(\rm C_2H_8N_2O_3\).

Explanation:

Look up the relative atomic mass of these four elements on a modern periodic table:

The relative atomic mass of an element is numerically equal to the mass (in grams, \(\rm g\),) of one mole of atoms of this element.

For example, the relative atomic mass of \(\rm C\) is approximately \(12\). Therefore, each mole of \(\rm C\!\) atoms would have a mass of \(12\; \rm g\).

This sample contains \(24\; \rm g\) of carbon. That would correspond to approximately \(\displaystyle \left(\frac{24}{12}\right)\; \rm mol = 2\; \rm mol\) of \(\rm C\) atoms.

Similarly, for the other three elements:

\(\displaystyle n(\mathrm{H}) \approx \frac{8\; \rm g}{1\; \rm g \cdot mol^{-1}} = 8\; \rm mol\).

\(\displaystyle n(\mathrm{N}) \approx \frac{28\; \rm g}{14\; \rm g \cdot mol^{-1}} = 2\; \rm mol\).

\(\displaystyle n(\mathrm{O}) \approx \frac{48\; \rm g}{16\; \rm g \cdot mol^{-1}} = 3\; \rm mol\).

Hence, the ratio between these elements in this compound would be:

\(n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3\).

In the empirical formula of a compound, the coefficients should represent the smallest possible integer ratio between the number of atoms of these elements.

\(n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3\) is indeed the smallest possible integer ratio between the number of atoms of these elements.

Apply the Hill System to arrange these four elements in the empirical formula. In the Hill System:

If carbon, \(\rm C\), is present in this compound, then:

If there is no carbon \(\rm C\) in this compound, then list all the elements in this compound in alphabetical order.

Both \(\rm C\) (carbon) and \(\rm H\) (hydrogen) are found in this compound. Therefore, the first element in the list would be \(\rm C\!\). The second would be \(\rm H\!\), followed by \(\rm N\!\) and then \(\rm O\!\).

Hence, the empirical formula of this compound would be \(\rm C_2H_8N_2O_3\).

The empirical formula of the compound is C₂H₈N₂O₃  

From the question given above, the following data were:

Carbon (C) = 24 g

Hydrogen (H) = 8 g

Nitrogen (N) = 28 g

Oxygen (O) = 48 g

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

C = 24 g

H = 8 g

N = 28 g

O = 48 g

C = 24 /12 = 2

H = 8 /1 = 8

N = 28 /14 = 2

O = 48 / 16 = 3

We can see from the above calculations that the elements are in simple whole number ratio.

Thus, the empirical formula of the compound is C₂H₈N₂O₃

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Answer:

С3Н6.

Explanation:

Hello!

In this case, since addition reactions imply that a radical or some radicals are added to the parent chain, we notice that only unsaturated hydrocarbons are able to undergo addition whereas saturated ones undergo substitution reactions as they already have all the carbon bonds bonded to leaving groups.

In such a way, we can rule out C2H6, C3H8 and CH4 as they are all alkanes; therefore, only С3Н6 is able to undergo an addition reaction due to the C=C which is able to lose one of those bonds and allow an incoming radical to get included into the parent chain.

Best regards!

Explanation:

Cooking utensils, such as pots, pans and menu trays, are often made from aluminium because it is lightweight and conducts heat well, making it energy-efficient for heating and cooling. These properties also make it a preferred material for packaging.

Answer:

32C Is the water hot or cold?

Explanation:

The final temperature of 690.1 g of water is 20.024°C.

To find the final temperature of 690.1 g of water, we need to know the initial temperature and the amount of heat added to the water. Water has a specific heat capacity of 4.184 J/g°C.

Here is an example calculation:

Let's say the initial temperature of the water is 20°C and we add 100 J of heat. To find the final temperature, we can use the equation:

q = mcΔT

where q is the heat added, m is the mass of the water (690.1 g), c is the specific heat capacity of water (4.184 J/g°C), and ΔT is the change in temperature.

Solving for ΔT:

ΔT = q / (mc)

ΔT = (100 J) / (690.1 g × 4.184 J/g°C)

ΔT = 0.024°C

We multiply the original temperature by the temperature change to obtain the final temperature:

final temperature = initial temperature + ΔT

final temperature = 20°C + 0.024°C

final temperature = 20.024°C

So the final temperature of 690.1 g of water is 20.024°C.

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Explanation:

weathering is correct answer thanks

Answer:

Your answer would be:
C.) Nitrogen Cycle

Nitrogen moves continuously between the atmosphere and soil in what is called the nitrogen cycle.

Explanation:

The nitrogen cycle is the biogeochemical cycle describing how nitrogen moves through the biosphere and atmosphere. The nitrogen cycle is a lot like the carbon and water cycle. Rainstorms contribute atmospheric nitrogen through raindrops that reach the soil. Plants, such as soybeans, alfalfa, and clovers, are plants that can convert atmospheric nitrogen into plant-usable nitrogen.


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Answer:

I don't know what is that

Answer:

Delete your discord acc, and make another one. Prob should change email tbh. If he keeps doing it you can report him, because it's like online stalking.

Explanation:

The mole fraction and molality of alcohol, C₂H₅OH, in 85°proof vodka is 0.186 and 12.70 mol/kg respectively.

Data provided:

Molality = moles of solute/kilogram of solvent

Mole fraction = number of moles of solute/ total number of moles

Density = mass/volume

number of moles = mass/molar mass

molar mass alcohol, C₂H₅OH = 46 g/mol

molar mass of water = 18 g/mol

density of water = 1 g/mL

the density of alcohol = 0.79 g/mL

Calculating moles of solute

85° proof vodka = 1/2 * 85% v/v

85° proof vodka = 42.5 % alcohol

In 100 mL vodka:

Volume of alcohol = 42.5 mL

volume of water = 57.5 mL

mass of alcohol, C₂H₅OH = density * volume

mass of alcohol, C₂H₅OH = 0.79 * 42.5

mass of alcohol, C₂H₅OH = 33.575 g

moles of alcohol = 33.575 g / 46 g/mol

moles of alcohol = 0.730 moles

Calculating mole fraction

Total moles = 3.194 + 0.730

Total moles = 3.924 moles

Mole fraction of alcohol = 0.730/3.924

Mole fraction of alcohol = 0.186

Calculating the molality of alcohol

Therefore, the mole fraction and molality of alcohol, C₂H₅OH, in 85°proof vodka is 0.186 and 12.70 mol/kg respectively.

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The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.

An electrical charge is a type of positive or negative charge of the particles that move in a conductor.

At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.

The electrical charges depend on the charge's initial time, the final time, and the net outward current.

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Answer: 313,632 seconds

Explanation:

Answer:

Balance The Equation: C2H2 + O2 = CO2 + H2O

1. Label Each Compound With a Variable

  aC2H2 + bO2 = cCO2 + dH2O

2. Create a System of Equations, One Per Element

  C: 2a + 0b = 1c + 0d

  H: 2a + 0b = 0c + 2d

  O: 0a + 2b = 2c + 1d

3. Solve For All Variables (using substitution, gauss elimination, or a calculator)

  a = 2

  b = 5

  c = 4

  d = 2

4. Substitute Coefficients and Verify Result

  2C2H2 + 5O2 = 4CO2 + 2H2O

      L R

  C: 4 4 ️

  H: 4 4 ️

  O: 10 10

Answer:

  30. 5 planes are shown

  31. 1 plane

  32. CEF

  33. on line AB

  34. E or F

   35. ABCD or BCEF or CDEF or ACEF

Explanation:

30. Each of the surfaces of the rectangular pyramid is a plane. There are 5 planes.

__

31. 3 points define one plane only.

__

32. The only points shown on the same line segment are points E, F, and C.

__

33. If G is to be collinear with A and B, it must lie on line AB.

__

34. The only points shown that are not on plane N are points E and F. Either of those will do.

__

35. There are three planes that have 4 points shown on them. The four points that are on the same plane are any of ...

Plane ACEF is not shown on the diagram, but we know that those 4 points are also coplanar. (Any point not on line CE, together with the three points on that line, will define a plane with 4 coplanar points.)