What is the molarity of a solution when 285 grams of HCl are dissolved in 0.350L of solution?

Answer:

The specific heat of the metal is 0.212 J/(g°C).

Explanation:

We can calculate the specific heat of the metal by the following equilibrium:

\( q_{a} = -q_{b} \)                          

\( m_{a}C_{a}\Delta T_{a} = -m_{b}C_{b}\Delta T_{b} \)

\(m_{a}C_{a}(T_{f_{a}} - T_{i_{a}}) = -m_{b}C_{b}(T_{f_{b}} - T_{i_{b}})\)

In the above equation, we have that the heat loses by the metal (b) is gained by the water (a).

\(m_{a}\): is the water's mass = 72.0 g

\(C_{a}\): is the specific heat of water = 4.184 J/(g°C)            

\(T_{i_{a}}\): is the initial temperature of the water = 19.2 °C

\(T_{f_{a}}\): is the final temperature of the water = 25.5 °C

\(m_{b}\): is the metal's mass = 141 g

\(C_{b}\): is the specific heat of metal =?

\(T_{i_{b}}\): is the initial temperature of the metal = 89.0 °C

\(T_{f_{b}}\): is the final temperature of the water = 25.5 °C

\(m_{a}C_{a}(T_{f_{a}} - T_{i_{a}}) = -m_{b}C_{b}(T_{f_{b}} - T_{i_{b}})\)

\(72.0 g*4.184 J/(g^{\circ} C)*(25.5 ^{\circ} C - 19.2 ^{\circ} C) = -141 g*C_{b}*(25.5 ^{\circ} C - 89.0 ^{\circ} C)\)            

\( C_{b} = -\frac{72.0 g*4.184 J/(g^{\circ} C)(25.5 ^{\circ} C - 19.2 ^{\circ} C)}{141 g(25.5 ^{\circ} C - 89.0 ^{\circ} C)} = 0.212 J/(g^{\circ} C) \)

Therefore, the specific heat of the metal is 0.212 J/(g°C).

I hope it helps you!

Answer:

The balanced chemical reaction is expressed as:

HCl + NaOH ---> NaCl + H2O

We are given the amount and the concentration of the sodium hydroxide reactant. This will be the starting point for the calculations.

0.100 mol NaOH/L solution (0.06 L solution) ( 1 mol HCl / 1 mol NaOH) = 0.006 mol HCl

Molarity = amount in moles / Volume of solution = 0.006 mol HCl/ 0.150 L

Molarity = 0.04 M

Explanation:

Answer:

The charge would be -1.

Explanation:

Answer:

condensed matter should be your answer

Explanation:

Answer:A.salinity levels, air quality, water density

Explanation:nba youngboy

Answer:

1.To discover new things.

2.To improve accuracy of existing experiment.

3.To prove or disprove theories.

4.To find anomalies in experiment.

the answer would be d!! hope this helps

Answer:

0.005356

Explanation:

Answer:

sublimation. During this process, naphthalene being sublime changes into vapours leaving behind impurities. Vapour can be cooled by condensation. This process is very helpful in separating a volatile solid from a non-volatile solid.

Answer:

Alkene

Explanation:

An organic compound with carbon and hydrogen and at least one double bond is an alkene.  You can also have alkanes and alkynes.

Alkanes have single bonds.  Alkynes have at least one triple bond.

Answer:

an alkene is an hydrocarbon that contains a carbon–carbon double

bond.

The term is often used as synonym of olefin, that is, any hydrocarbon containing

one or more double bonds.

When the partial pressure of carbon dioxide (pCO2) in the plasma increases, this leads to a decrease in plasma pH, resulting in a more acidic environment. The relationship between pCO2 and pH is described by the Henderson-Hasselbalch equation, which helps predict the acid-base balance in the body.

An increase in pCO2 levels indicates that more CO2 is being produced or less is being eliminated. As CO2 dissolves in the plasma, it forms carbonic acid (H2CO3), which subsequently dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-). The increase in H+ ions is what causes the decrease in pH, signifying a more acidic environment.
This change in pH can disrupt the body's normal homeostasis and is commonly referred to as respiratory acidosis. The body's response to this imbalance involves various buffering systems, such as the bicarbonate buffer system, to help restore pH to a normal range.
In conclusion, an increase in plasma pCO2 levels leads to a decrease in plasma pH, creating a more acidic environment. This can disrupt the body's normal functioning and prompt compensatory mechanisms to restore the acid-base balance.

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Answer: 1.47 g

Explanation:

207.2 g/mol × 0.0071 mol = 1.47 g

You can find the molar mass of lead, Pb, on the periodic table, 207.2 g/mol.

0.0071 moles lead = 1.47112 grams

Explana tion:

The  work (in joule)  performed on the surrounding  when 1 mole of an ideal gas expanded from a volume of 1. 00 liter to a volume of 8. 93 liter against a constant external pressure of 1. 00 atm is 803 joules

we know that,

n = 1 mole

Vi = 1 L

Vf = 8.93 L

P = 1 atm

the work performed on the surrounding under constant pressure is given as can be calculated as below:

W = P∆V

W = P(Vf—Vi)

W = 1 atm × (8.93—1) L

W = 1 atm × 7.93 L

W = 8.93 Litre•atm

Given that,

1 Litre•atm = 101.3J

So,

W = 7.93 Litre•atm × 101.3J/Litre•atm

W = 803.309 J

W ≈ 803 J

Then the work done on the surrounding is approximately

803 joules

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Answer:

sediments consist of rocks and minerals, as well as the remains of plants and animals

Explanation:

The gas with the lowest root mean square velocity at 400 K is Ne, and its root mean square velocity at 400 K is 444.6 m/s.

vrms = sqrt((3RT)/M)

where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.

For Ne gas at 400 K, the molar mass is 20.18 g/mol. Thus, we have:

vrms = sqrt((3 x 8.314 J/mol-K x 400 K)/(20.18 g/mol x 0.001 kg/g))

vrms = 444.6 m/s (rounded to one decimal place)

Therefore, the root mean square velocity of Ne gas at 400 K is 444.6 m/s.

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Answer:

influence of a business invironment

Answer:

500/100=5m

W=F*D

W=20*5=100Nm

Explanation:

The work done in Nm on the object is 100 Nm

Since A force of 20N acts on an object. It causes a displacement of 500 cm in the direction of the force.

Since the displacement is in cm

So, in meters, it should be like

= 500 / 100

= 5 m

Now we know that

Work done = force * displacement

= 20N * 5

= 100 Nm

hence, The work done in Nm on the object is 100 Nm

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Using prefixes before the name of each element, the number of atoms of each element present in the molecular is indicated.

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Answer:

Cl-35 isotope is more abundant.

Explanation:

How to calculate the abundance of isotopes in a mixture from the mass of isotopes and the average atomic mass of the element?

Solution :

Say the % abundance of Cl - 35 is x, i.e, 100 units of Cl contains x units of Cl-35.

Therefore, the % abundance of Cl - 37 is (100 - x).

∴ [35 x + 37 (100-x)] = 35.45 x 100

Simplifying the above equation, we get

-2x + 3700 = 3545

Subtracting 3700 from both sides of the equation, we get

-2x = -155

or, 2x = 155

Dividing both sides of the equation by 2, we get

x = 155 ÷ 2 = 77.5

∴ 100 -x = 22.5

Thus, Cl-35 is more abundant (77.5%) than Cl-37 (22.5%).

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The chemical reaction taking place to let the meat be tenderized when it is soaked in lemon juice or vinegar is called denaturation.

Denaturation is a process where the protein structure of the meat changes due to the acidity of the lemon juice or vinegar. The acidity breaks down the proteins, making the meat more tender. This is why meat is often soaked in an acidic liquid such as lemon juice or vinegar to tenderize it.

Meat is left tenderized by soaking in a liquid like lemon juice or vinegar for several hours because the acid in the vinegar or lemon juice breaks down the proteins in the meat. The acidity breaks down the proteins, making the meat more tender and easier to chew. Vinegar and lemon juice work so well to tenderize meat because they contain acid. Denaturation is the process by which proteins are altered due to changes in pH, temperature, or other conditions. When meat is soaked in vinegar or lemon juice, the acid denatures the proteins in the meat, making it more tender.

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Answer:

to attain stability atoms form covalent bonds

The power required by the "active Na⁺ pumping" system to produce this flow against the +25 mV potential difference is approximately 4 × 10⁻¹⁷ W.

To calculate the power required by the "active Na⁺ pumping" system, we need to consider the current (rate of ion movement) and the potential difference across the axon. Power is given by the equation:

Power = Current × Voltage

Given:

Current (I) = 5 × 10⁻⁷ mol/(m²·s)

Voltage (V) = +25 mV = +25 × 10⁻³ V (since 1 mV = 10⁻³ V)

To determine the power, we need to convert the current to amperes (A) and multiply it by the voltage:

I (in A) = Current × elementary charge (e)

e = 1.6 × 10⁻¹⁹ C (charge of an electron)

Now we can calculate the power:

Power = I × V

First, let's convert the current from mol/(m²·s) to A/m²:

I (in A/m²) = Current (in mol/(m²·s)) × Avogadro's number (Nₐ) / time (s)

Nₐ = 6.022 × 10²³ mol⁻¹ (Avogadro's number)

Now, we can calculate the power:

Power = I (in A/m²) × V (in V)

Note: We assume the axon is a cylinder with a circular cross-section.

Given:

Length of axon (L) = 10 cm = 0.1 m

Diameter of axon (d) = 20 μm = 20 × 10⁻⁶ m

To calculate the cross-sectional area (A) of the axon, we use the formula for the area of a circle:

A = π × (d/2)²

Now, we can calculate the power:

Power = I (in A/m²) × V (in V) × A (in m²)

Substituting the given values:

A = π × (20 × 10⁻⁶ / 2)² = π × 100 × 10⁻¹² m²

Power = (5 × 10⁻⁷ A/m²) × (25 × 10⁻³ V) × (π × 100 × 10⁻¹² m²)

Simplifying the expression:

Power ≈ 4 × 10⁻¹⁷ W

Rounding to one significant figure, the power required by the "active Na⁺ pumping" system to produce this flow against the +25 mV potential difference is approximately 4 × 10⁻¹⁷ W.

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Answer:

2 Li(s) + 2 H2O(l) = 2 LiOH(aq) + H2(g)

The term mole concept is used here to determine the moles of copper. It is the convenient method for expressing the amount of the substance. The number of moles of copper in 564 grams is  8.87 moles.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

Molar mass of copper = 63.55 g / mol

Number of moles = 564 / 63.55 = 8.87 moles

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Answer:

\(\huge\boxed{\sf P = 800.8\ Ns}\)

Explanation:

Speed = v = 10.4 m/s

Mass = m = 77 kg

Momentum = P = ?

P = mv

Put the given data in the above formula.

P = (77)(10.4)

\(\rule[225]{225}{2}\)

The new rate of the modified reaction will be 44mmmM/s which can be calculated by the rate of disappearance.

For this response, the rate of disappearance was calculated. The concentration will drop as it is consumed. After 54 minutes, the concentration dropped to 1.58 molar.

What is the reaction's speed?

Units are a way to express the reaction rate. HCl is characterized by a change in polarity of the compound per unit of time or per change in time. We have 1.85 Molar moving to 1.58 Molar in 54 minutes. Ten times as much negative three molar HCl would be produced each minute. People should subtract the initial polarity from the end one to do it correctly.

Because of the drug's concentration, we experience a negative rate of reaction. The fact that the rate is negative indicates that we are consuming.

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Answer:

Ar(Mg)=24g

Ar(Cl)=35,5 and Cl2=35,5×2=71g

m=24g+71g=95g

The device that is most famously used to find the molecular weight of a compound is a mass spectrometer.

A mass spectrometer is an analytical instrument that is used to measure the mass-to-charge ratio of charged particles. It works by ionizing a sample of the compound, accelerating the ions, and then measuring their masses using a magnetic or an electric field. The resulting mass spectrum can be used to determine the molecular weight of the compound, as well as its elemental composition and isotopic distribution. Mass spectrometry is widely used in chemistry, biochemistry, and other fields to identify and quantify molecules, and it is considered one of the most accurate and precise methods for determining molecular weight.

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