You are given a 250 ml sample of HCI and asked to find out what its concentration is. You have a 0 118 M Ca(OH)2 solution and it takes 13.7 ml to
neutralize the acid sample. What is the concentration of the HCI? Show explanation Please help this is urgent

Answer:

13

Explanation:

Answer:

True

Explanation:

There will be 0.4589 mL of ethyl acetate left in the space after evaporation.

The conversion of a liquid substance into a gas is known as evaporation. As a result of the liquid absorbing energy from its surroundings, molecules begin to travel faster and faster until they finally become a vapour and escape into the environment. Usually, the energy is absorbed as heat, but it can also be in the form of light or electricity.

No, the ethyl acetate won't all evaporate. The amount of ethyl acetate that will stay in the space after evaporation can be determined using the ideal gas law. As per the ideal gas law, PV = nRT

P is the overall system pressure, V is the room's volume, n is the amount of ethyl acetate in moles, R is the ideal gas constant, and T is the temperature.

To solve for n, the quantity of moles of ethyl acetate, we can rearrange the equation as follows: n = PV/RT

When the values are plugged in, we get:

n = (94.9 torr)(7.25 m x 2.75 m x 2.75 m)/(8.314 J/K mol)(298 K)

\(n = 4.666 \times 10^{-3} mol\)

The molar mass of ethyl acetate (88.11 g/mol) can then be used to compute the mass of ethyl acetate:

Mass = \(n \times M = (4.666 x 10^{-3} mol)(88.11 g/mol)\) = 0.4125 g

Using the density of ethyl acetate (0.901 g/mL), it is possible to determine the volume of the liquid that is still present:

Volume = mass/density = (0.4125 g)/(0.901 g/mL) = 0.4589 mL

As a result, there will be 0.4589 mL of ethyl acetate left in the space after evaporation.

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The balanced chemical equation for the double-replacement precipitation reaction between lead(II) nitrate and chromium(II) sulfate can be written as: Pb(NO3)2 + CrSO4 → PbSO4 + Cr(NO3)2

In this reaction, lead(II) nitrate and chromium(II) sulfate react to form lead(II) sulfate and chromium(II) nitrate. The lead sulfate is insoluble in water and precipitates out of the solution, while the chromium nitrate remains in the solution as a soluble salt.

Thus, the balanced chemical equation for the double-replacement precipitation reaction between lead(II) nitrate and chromium(II) sulfate can be written as:

Pb(NO3)2 + CrSO4 → PbSO4 + Cr(NO3)2

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Answer:

2Al+3H2SO4 ---> Al2(SO4)3+3H2

Explanation:

same amount of al, h, and so4 on each side

Answer:

um 27 yards..............

The correct number of significant figures in the number \(9.080 \times 10^4\) is 4.

Significant figures refer to the digits in a number that are trustworthy and denote the amount of something, also known as the significant digits, accuracy, or resolution.

Only the digits allowed by the measurement resolution are dependable, hence only these can be important figures if a number expressing the outcome of a measurement (such as length, pressure, volume, or mass) has more digits than the number of digits allowed by the measurement resolution.

Some rules to understand significant figures:

1. Non-zero digits are always significant

2. Zeros between non-zero digits are always significant.

3. Leading zeros are never significant.

4. Trailing zeros are only significant if the number contains a decimal point

This number has 4 significant figures.

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Copper is the limiting reactant, with n(Copper) = 0.969 mol being less than n(Nitric acid). It produces 17.44 grammes of water. As the outcome is negative, there is no excess Nitric acid. The reaction uses up all of the Nitric acid.

The method described in the following steps can balance a redox equation: (1) Split the equation into two equal halves. (2) Make each half-mass reaction's and charge equal. (3) Ensure that the quantity of electrons going to each half-reaction is the same. The half-reactions should be combined.

n(Nitric acid) = (246 mL) x (6.60 mol/L) = 1.6236 mol

Since n(Copper) = 0.969 mol is less than n(Nitric acid), Copper is the limiting reactant.

m(Water) = n(Water) x M(Water) = 0.969 mol x 18.015 g/mol = 17.44 g

Therefore, 17.44 grams of Water is formed.

n(Nitric acid) needed = n(Copper) x 2 = 1.938 mol

The excess amount of Nitric acid is:

n(Nitric acid) excess = n(Nitric acid) initial - n(Nitric acid) needed

= 1.6236 mol - 1.938 mol

= -0.3144 mol

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Answer:

plum pudding model .

Explanation:

the electrons were 'like plums embedded in a pudding'. Also called the Raisin Bread Model.

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

All the element have their own unique color because the every element have their own set of energy levels.

According to the bohr model of atoms : electrons exist at certain energy levels. when we give heat to electron , it gets excited and moves from lower energy level to higher energy level. the electron is less stable in higher energy level. when an electron returns from higher energy level to lower energy level it emits some energy in form of radiation. The wavelength of light depends upon energy level . and every elements have their own unique energy levels.  The color for different element is different.

Thus, All the element have their own unique color because the every element have their own set of energy levels.

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The volume of hydrogen gas required to produce 25.0 grams of water at STP is 31.2 liters.

The balanced chemical equation for the reaction between hydrogen gas and oxygen gas to produce water is:

2H2(g) + O2(g) → 2H2O(l)

From the equation, we can see that 2 moles of hydrogen gas are required to produce 2 moles of water. The molar mass of water is 18 g/mol, so 2 moles of water has a mass of 36 g.

Therefore, to produce 25.0 grams of water, we need to use:

(25.0 g / 36.0 g/mol) * 2 mol H2/mol H2O = 1.39 mol of H2

At STP (standard temperature and pressure), 1 mole of gas occupies 22.4 L of volume.

So, 1.39 moles of H2 will occupy:

1.39 mol x 22.4 L/mol = 31.2 L

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Answer:

La ley de los gases ideales relaciona cuatro propiedades macroscópicas de los gases ideales (presión, volumen, número de moles y temperatura). Si conocemos los valores de tres de estas propiedades, podemos utilizar la ley de los gases ideales para conocer la cuarta. En este video, usaremos la ley de los gases ideales para resolver el número de moles (y en última instancia de moléculas) en una muestra de un gas

Explanation:

The molarity of the solution will be 4.97 M.

It is the number of moles of solutes per 1 liter of solvent or solution.

Mole of 34.1 g NaCl = 34.1/58.44 = 0.5835 mol

117.3 mL = 117.3/1000 = 0.1173 L

Molarity of the solution = 0.5835/0.1173 = 4.97 M

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1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Answer:

Explanation:

Here, we want to get the factor that is responsible for the observation

According to Charles' law, the volume of a given mass of gas is directly proportional to the temperature

What this means is that as the heat is increased, the volume is increased too

When the

The median of the following set of data (39.8, 39.6, 39.2, 39.6 and 39.5) is 39.6.

Median is a number separating the higher half from the lower half of a data sample, population, or probability distribution.

The median of a finite list of numbers can be found by arranging all the observations from lowest value to highest value and picking the middle one (e.g., the median of {3, 3, 5, 9, 11} is 5.

The following set of data was given this question;

39.8, 39.6, 39.2, 39.6 and 39.5

We arrange these data as follows:

39.2, 39.5, 39.6, 39.6, 39.8

The middle number or median is 39.6

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Acetone has a concentration of 0.74 Mm.

Acetone is an organic chemical that is colorless, combustible, volatile, and has a distinctively strong odor. It is a solvent that is frequently used in a variety of commercial and domestic settings. It also serves as a starting point for the synthesis of other chemicals. Acetone has the chemical formula CH3COCH3 and a molecular weight of 58.08 g/mol.

We must first determine how many moles of acetone are present in the solution.

Per kilogram of solvent, one molal equals one mole of solute.

Since 1 kilogram is equivalent to 1000 milliliters of ethanol, it is possible to compute the number of moles of acetone as follows:

1000 mL/kg times 1.00 mol/kg is 1.00 mol.

The mass of acetone in the solution can then be determined using the molar mass of acetone (58.08 g/mol):

1 mole * 58.08 g/mol = 58.08 g

The volume of acetone can then be calculated by dividing the mass by the density:

58.08 g/0.788 g/mL equals 73.56 mL.

Finally, the molality of acetone can be determined as follows:

0.0074 mol/L (1.00 mol)/1.00 mol/(73.56 mL + 1000 mL) = 0.74 mM.

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Answer:

true

because with the both states we increase the surface of reaction

Answer:

6116g

Explanation:

2SO2(g) + O2(g) + 2H2O(ℓ) −→ 2H2SO4(ℓ)

We want to find the mass in grams of SO2 that is needed to react with 1527 g of O2. First we must convert the grams of O2 to moles of O2 then to moles of SO2 and then to grams of SO2

So first lets find the molar mass of O2

The mass of oxygen according to a periodic table is 15.999

Using this the mass of O2 would be 15.999(2) = 31.988g

Next we need to identify the mole ratio of O2 to SO2

Looking at the equation for 1 mole of O2 there are two moles of SO2

Next we need to find the molar mass of SO2

Again the mass of oxygen is 15.999g and the mass of Sulfur is 32.066

So the mass of SO2 would be 15.999(2) + 32.066 = 64.064g

Now that we have found all the needed conversions :

We can now use dimensional analysis to calculate the answer.

Kindly check the attached image to see the table. ( sorry if its a bit blurry )
Explanation : The conversions are used to cancel out the units to get to the final unit which is gSO2.

Once the units are cancelled out except for the gSO2 we mutliply and divide based off of what the table says to do.
Here first we divide 1527 by 31.988. We than multiply by 2. Finally we multiply by 64.064 to get the final answer which is 6116gSO2

Answer:

Investigating delayed detections of climate mitigation benefits arising from individual and combined reductions of climate forcing emissions, the scientists' simulations demonstrated that if we fully stopped greenhouse gas emissions in 2020, warming could be halted as soon as 2033, but this is highly impractical

Explanation:

Answer:

a. evaporation .

Explanation:

In this case, given the described situation, we should take into account that there are two types of liquid-gas phase transitions, evaporation and vaporization, which occur in totally different way.

Firstly, evaporation is a superficial phenomena, it means that it occurs at the surface of the liquid only whereas the vaporization is a bulk phenomena, which means that it occurs along the whole volume of liquid.

In such a way, we can infer that cold steam stream flowing over the pond has the capacity to strip or remove liquid water molecules in the pond and take them to the vapor phase, which means that the answer is a. evaporation .

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Answer:

If you could miraculously remove two neutrons from an atom's nucleus, the atomic number and electrical charge would stay unaltered. Because neutrons have no electrical charge, adding or removing them from the nucleus has no effect on the nucleus's electrical charge. It does, however, alter the nucleus's mass. Isotopes are formed by adding or subtracting neutrons from the nucleus.

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