what is the pressure of 1.64 g of nitrogen gas confined to a volume of 0.280 l at 22 ∘c ?

Answer:d

Explanation:because im really really sure thats the answer

Answer:

Explanation:

For many species of frogs, a male's mating call is the most well-recognized method of attracting females. ... Other species of females prefer males who call next to a pre-made nest. Females are on the lookout for males who go the extra mile when calling, since they presume these males are good quality mates.

The specific gravity measured by the urine chemical reagent strip method is a measure of the density of the urine compared to water.

What is specific gravity?
The ratio of a substance's density (mass per unit volume) to the density of a specific reference material is known as its relative density or specific gravity. When determining a substance's specific gravity, liquids are typically compared to the densest form of water (at 4 °C or 39.2 °F); for hydrocarbons, the reference point is air at room temp (20 °C or 68 °F). Scientific jargon favours the term "relative density," which is frequently abbreviated as "RD," while deprecating the term "specific gravity." A substance is less dense than the reference if its relative density is less than 1, and it is denser than the reference if it is greater.

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Therefore, the pH value of the solutions with [H+] values of 0.01, 1.0 x 10 –8, and 4.67 x 10 –4 are 2.0, 8.0, and 3.33 respectively.

pH is a measure of acidity or alkalinity of a solution and ranges from 0 to 14.

The value of pH is defined as the negative logarithm of hydrogen ion concentration. The hydrogen ion concentration in a solution is a measure of its acidity or basicity. The higher the hydrogen ion concentration, the lower the pH value, and the solution is more acidic. Similarly, the lower the hydrogen ion concentration, the higher the pH value, and the solution is more alkaline.

Hence, the pH value of the solutions with the given [H+] values can be calculated as follows:

a) [H+] = 0.01pH

= -log[H+]

= -log(0.01)

= 2.0

b) [H+] = 1.0 x 10 –8 pH

= -log[H+]

= -log(1.0 x 10 –8)

= 8.0

c) [H+] = 4.67 x 10 –4 pH

= -log[H+]

= -log(4.67 x 10 –4)

= 3.33

It is important to remember that the hydrogen ion concentration [H+] is measured in moles per liter (mol/L), and the pH value of a solution can be calculated using the formula: pH = -log[H+].

Also, the negative sign in the formula indicates that the pH value is inversely proportional to the hydrogen ion concentration.

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Answer:

Here's what I get  

Explanation:

(i) Voltaic cell

A voltaic cell is a device that uses a chemical reaction to produce electrical energy.

(ii) Overall Cell Potential

The standard reduction potentials for the half-reactions are

                               ℰ°/V

Cu²⁺ + 2e⁻ ⇌ Cu    0.34

Zn²⁺ + 2e⁻ ⇌ Zn   -0.76

The half-reaction with the more positive potential is the reduction half-reaction. It is the reaction that occurs at the cathode.

The half-reaction with the more negative potential is the oxidation half-reaction. It is the  reaction that occurs at the anode.

We reverse that half-reaction and subtract the voltages to get the cell reaction.

                                                          ℰ°/V

Cathode:  Cu²⁺ + 2e⁻ ⇌ Cu              0.34

Anode:     Zn ⇌ Zn²⁺ + 2e⁻              -0.76

Cell:          Zn +  Cu²⁺ ⇌ Zn²⁺ + Cu    1.10

\(\mathcal{E}_{\text{cell}}^{\circ} = \mathcal{E}_{\text{cat}}^{\circ} - \mathcal{E}_{\text{an}}^{\circ} = \text{0.34 V} - \text{(-0.76 V)} = \text{0.34 V} + \text{0.76 V} = \textbf{1.10 V}\)

(iii) Diagram

The specific labels will depend on your textbook.

They are often as follows.

a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

The salt bridge enables ions to flow in the internal circuit and to maintain electrical neutrality in the two compartments.

It often consists of a saturated solution of KCl.

As Zn²⁺ ions form in the anode compartment, Cl⁻ ions move in to provide partners for them.

As Cu²⁺ ions are removed from the cathode compartment, K⁺ ions move in to replace them.

Answer:a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

Explanation:

Answer:

Maintains natural hair moisture.

Prevents hair frizz.

Reduces hair breakage & tangles.

Longer lasting hair styles.

Explanation:

Answer:

in w

Explanation:

first blood enter renal artery which enter glomerous( where blood is filtrated) and then to Bowman carpusle(take the filtrated blood)

and then to proximal tubular(absorbed salt) and then to loop of hanle (y)(absorb water) and then to distal tubule then to ureter (z) and then to renal vein(x)(to go to urinary bladder)

Answer:

9.0g

Whabshsbzhz sbsj dhbxjsbxjz sbsbbsbsjs

Explanation:

cause I believe

Answer:

Its a rock planet and has an iron core

Explanation:

Answer:

"a rocky planet with a huge iron core"

it takes up nearly 3/4of the planets diameter

It orbits around the sun

The initial temperature of the carbon dioxide sample at a volume of 574.8 mL was approximately 218 K.

To find the initial temperature of the carbon dioxide sample when its volume was 574.8 mL, we can use the combined gas law formula which relates initial and final temperatures, volumes, and pressures:

P1V1/T1 = P2V2/T2

In this case, the pressure (P) remains constant, so the formula can be simplified to:

V1/T1 = V2/T2

We are given:
V1 = 574.8 mL
V2 = 824.1 mL
T2 = 311 K

We need to find T1. Rearrange the formula to solve for T1:

T1 = (V1 * T2) / V2

Plug in the values:

T1 = (574.8 mL * 311 K) / 824.1 mL

T1 ≈ 218 K

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Answer:

Each atom has electrons, particles that carry electric charges. Spinning like tops, the electrons circle the nucleus, or core, of an atom. Their movement generates an electric current and causes each electron to act like a microscopic magnet

Explanation:

trust me

Answer:

When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.

Explanation:

According to the given statement the molarity of the iron(ii) solution is 0.72 M.

Molarity (M), which is determined by dividing the solute's mass in moles by the the solution's volume in liters, is the most widely used unit to represent solution concentration: litres of solution/moles of salt equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

Volume of iron(II) solution (V₁) = 25.0 mL = 0.025 L

Molarity of iron(II) solution (M₁) = ?

Number of moles of iron(II) solution (n₁) = ?

Volume of dichromate solution (V₂)

= 18.0 mL

= 0.018 L

Molarity of dichromate solution (M₂) = 0.175 M

Number of moles of dichromate solution (n₂) = ?

Molarity of dichromate solution is given as:

M\(_2\) = n\(_2\)/V\(_2\)

n\(_2\) = M\(_2\) * V\(_2\)

= .175 * 0.018

= 3.15 * 10^-3

Now, let us write the complete balanced reaction for the given situation.

So, the complete balanced equation is given below.

\($6 \mathrm{Fe}^{2+}(a q)+\mathrm{Cr}_2 \mathrm{O}_7^{2-}(a q)+14 \mathrm{H}^{+}(a q) \rightarrow 6 \mathrm{Fe}^{3+}(a q)+2 r^{3+}(a q)+7 \mathrm{H}_2 \mathrm{O}$\)

From the equation, it is clear that, 1 mole of dichromate is required for 6 moles of iron(II) solution.

To find the number of moles of iron(II) solution.

1 mole of dichromate = 6 moles of iron(II)

∴ n₂ moles of dichromate = 6n₂ moles of iron(II)

                                          = 6 * 3.15 * 10⁻³ = 0.0189 mol Fe²⁺

So, 0.016 moles of iron(II) is needed. Therefore,

Now, molarity of iron(II) solution is given as:

Molarity = Moles ÷ Volume

M\(_1\) = n\(_1\)/v\(_1\)

M\(_1\) = 0.018/0.025  = 0.72 M

The molarity of the iron(II) solution is 0.72 M.

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The correct answer is D) The element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵ is Mn, which has 25 electrons in total.

The electron configuration is a way of representing the arrangement of electrons within an atom or ion. The numbers and letters in the configuration represent the energy levels, subshells, and number of electrons in each subshell.

In this case, the configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵ represents a neutral manganese atom with 25 electrons. The first two electrons occupy the 1s orbital, followed by two in the 2s, six in the 2p, two in the 3s, six in the 3p, two in the 4s, and finally five in the 3d subshell.

This configuration explains why manganese is a transition metal with five valence electrons and exhibits a variety of oxidation states in chemical reactions.

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Answer:

2 atm

Explanation:

According to Boyle's Law, at constant temperature, the pressure of a gas is inversely proportional to its volume. Therefore, if the volume is decreased by half, the pressure will double.

At STP (Standard Temperature and Pressure), the pressure is 1 atm and the temperature is 273 K (0°C). So, if the initial volume is 6.0 L and it is decreased by half, the new volume will be 3.0 L.

Using Boyle's Law, we can calculate the new pressure as:

P1 x V1 = P2 x V2

where P1 is the initial pressure, V1 is the initial volume, P2 is the new pressure, and V2 is the new volume.

Substituting the given values, we get:

1 atm x 6.0 L = P2 x 3.0 L

Solving for P2, we get:

P2 = (1 atm x 6.0 L) / 3.0 L

P2 = 2 atm

Therefore, the new pressure would be 2 atm.

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The lab coat is not thick enough to protect you from ionizing radiation.

Radiation is a form of energy that we can not see with our optical eyes. We know that radiation could have a damaging effect on the body. The sort of radiation that could have a damaging effect on the body is what we call ionizing radiation.

We know that an ionizing radiation could only be stopped by a thick vest such as a lead coat. If you are wearing a lab coat, you are not safe because the lab cat is not thick enough to protect you from ionizing radiation.

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\({ \red{ \underline{ \tt{Langmuir \: adsorption \: isotherm:}}}}\)

The defect of Freundlich adsorption isotherm is that it fails at high pressure of the gas.

Langmuir derived the adsorption isotherm based on the theoretical considerations. It is generally applied to chemical adsorption.

It can be expressed as

\({ \blue{ \bold{ \frac{X}{m} = \frac{AP}{1+BP}}}}\)

where,

X = mass of the gas adsorbed

M = mass of the adsorbent

P = equilibrium pressure

To get a dose of 0.1 gm (100 mg), 1.5 ml of sodium amytal solution must be injected intramuscularly (IM).

We can use the available concentration and the desired dose.

Given

First, we need to convert the desired dose from grams to milligrams:

0.1 g = 100 mg

Now, we can set up a proportion to find the volume of solution needed:

(100 mg) / (200 mg) = (x ml) / (3 ml)

Cross-multiplying and solving for x:

100 mg * 3 ml = 200 mg * x ml

300 mlmg = 200 mlmg

x ml = (300 ml*mg) / (200 ml)

x ml = 1.5 ml

So, To get a dose of 0.1 gm (100 mg), 1.5 ml of sodium amytal solution must be injected intramuscularly (IM).

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1.the smallest things that can carry out life proccess

Answer:

a. 45×10³ kg

b. 1.25 kg

c. 5443200 s

d. 2.69×10⁻⁴ m/s²

e. 2.57×10⁻⁶N

f. 7.48×10⁻³ m /s²

g. 2.45 Pa

h. 10 m/s

Explanation:

The SI units are: kg, m, s, N, K, A, Pa, J and cd

a. 1 g is the mass for 1 cm³. We convert the m³ to cm³

45 m³. 1×10⁶ cm³ / 1 m³ = 45×10⁶ cm³

By the way, 45×10⁶ cm³ = 45×10⁶ g

We convert the g to kg →  45×10⁶ g . 1 kg / 1000 g = 45×10³ kg

b. As 1 g = 1 cm³,  we convert the cm³ to g and then, the g to kg

1250 cm³ = 1250 g → 1250 g . 1kg / 1000 g = 1.25 kg

c. 1 day has 24 hours; 1 hour has 60 minutes; 1 minute has 60 seconds

1 hour has 3600 s. Then 24 h . 3600 s / 1 h = 86400 s

86400 s/d. 63 d = 5443200 s

d. 1 min² = 3600 s²

97 cm / 3600 s² = 0.0269 cm/s²  / 100 = 2.69×10⁻⁴ m/s²

e. 927 g.cm / min² / 3600 s² = 0.2575 g.cm/s² → dyn

We need to convert dyn to N

1 dyn = 10⁻⁵N → 0.2575  dyn . 10⁻⁵N / 1dyn = 2.57×10⁻⁶N

f. 1 m/s² = 12960 km/h²

12960 km/h² . 1 m/s² / 97 km/h² = 7.48×10⁻³ m /s²

g. 2500 g/cm² . 1kg / 1000 g = 2.5 kg/cm²

1 Pa = 1.02kg/cm²

2.5 kg/cm² . 1 Pa / 1.02 kg/cm² = 2.45 Pa          

h. 1 h = 3600 s

36 km / 3600 s = 0.01 km /s → 0.01 km . 1000 m / 1 km = 10

= 10 m/s

Answer:

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

Explanation:

In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Answer:

C - Wind

Explanation:

its C or wind because global wind systems control the surface water

Answer:

Wind

Explanation:

surface water from oceans move from the wind I assume it is the same for all bodies of water

4. The biological processes involved in the treatment of biodegradable waste typically include composting and anaerobic digestion.

5. The type of waste that is treated through biological processes includes biodegradable waste, which consists of organic materials that can naturally decompose over time.

6. When treating municipal sewage, the recommended wastewater treatment (WWT) system depends on various factors, including the scale of the treatment, the quality of the incoming wastewater, and the specific requirements and regulations in place.

4. - Composting: Composting is a process where biodegradable waste, such as food scraps, yard waste, and agricultural residues, is decomposed by microorganisms in the presence of oxygen. This process involves creating an environment that supports the growth and activity of aerobic bacteria, fungi, and other microorganisms. The waste is typically mixed and turned regularly to ensure proper aeration and moisture levels. Over time, the microorganisms break down the organic matter, converting it into nutrient-rich compost that can be used as a soil amendment.

- Anaerobic Digestion: Anaerobic digestion is a process that occurs in the absence of oxygen. It involves the decomposition of biodegradable waste by anaerobic microorganisms, such as bacteria and archaea. The waste, such as organic matter, animal manure, or wastewater sludge, is placed in an enclosed tank or digester where it undergoes a series of biochemical reactions. The microorganisms break down the waste, producing biogas (mainly methane and carbon dioxide) and a nutrient-rich digestate. The biogas can be captured and used as a source of renewable energy, while the digestate can be used as a fertilizer.

5. This waste category typically includes food waste, yard waste, agricultural residues, paper products, and certain types of industrial waste that are primarily composed of organic matter.

6. One commonly used WWT system for municipal sewage treatment is the activated sludge process.

- Activated Sludge Process: The activated sludge process involves the treatment of sewage in an aeration tank where microorganisms, mainly bacteria, are cultured in a suspended growth medium. The incoming sewage is mixed with a culture of activated sludge containing microorganisms that consume organic matter and nutrients in the wastewater. The aeration process provides oxygen for the growth of aerobic bacteria, which help break down organic pollutants. After the aeration phase, the mixture is allowed to settle in a secondary settling tank, where the sludge (partially treated wastewater) settles to the bottom and can be recirculated or removed for further treatment. The treated effluent can then undergo additional processes, such as disinfection, before being discharged or reused.

It's important to note that the selection of the WWT system for municipal sewage treatment can vary depending on specific factors, and there may be other viable options such as sequencing batch reactors (SBRs), oxidation ditches, or membrane bioreactors (MBRs), depending on the specific requirements and resources available for wastewater treatment.

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Answer:

5

Explanation:

3 6 5 7 0

The concentration of the MgCl2 solution, prepared by dissolving 23.80 g of solute in enough water to form 500 mL of solution, is approximately 0.1258 M.

To determine the concentration of a MgCl2 solution, we need to calculate the amount of solute (MgCl2) dissolved in the solution and express it in terms of concentration, typically in units of molarity (M).

Given that 23.80 g of MgCl2 was dissolved in enough water to form 500 mL of solution, we can start by converting the volume from milliliters to liters:

Volume of solution = 500 mL = 500/1000 = 0.5 L

Next, we calculate the moles of MgCl2 using its molar mass. The molar mass of MgCl2 is the sum of the atomic masses of magnesium (Mg) and two chlorine (Cl) atoms:

Molar mass of MgCl2 = 24.305 g/mol (Mg) + 2 * 35.453 g/mol (Cl) = 95.211 g/mol

Moles of MgCl2 = mass of MgCl2 / molar mass of MgCl2 = 23.80 g / 95.211 g/mol

Now, we can calculate the concentration using the moles of solute and the volume of the solution:

Concentration (Molarity) = Moles of solute / Volume of solution

Concentration = moles of MgCl2 / 0.5 L

Finally, we substitute the calculated values:

Concentration = (23.80 g / 95.211 g/mol) / 0.5 L

Concentration = 0.5 * (23.80 g / 95.211 g/mol)

Concentration ≈ 0.1258 mol/L or 0.1258 M

Therefore, the concentration of the MgCl2 solution is approximately 0.1258 M.

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Answer is:

When one person exerts more force than the other so that the forces are unbalanced........ maybe, im not sure if im right

Answer:

c

Explanation:

Answer:

You can model a substance doing a Lewis structure

And also you can model it doing a bond-line structure.

As a result, the dry gas volume at STP is 45.58 cm 3.

Water vapor is present in the gas. Since H2 is created during the reaction and water vapor is irrelevant when determining the equivalent weight, we only need the dry gas. As a result, the volume of H2 gas can be calculated using the ideal gas law.

P 1 = 750 mm Hg, 14 mm Hg, 736 mm Hg V = 50 cm 3 T = 17 0 C = 290 K

P = 760mmHg, V =?cm3, T = 0 0 and C = 273K.

The Gas equation follows.

P 1V 1/ T1 = P 2V 2/ T2

290/73650 = 273/760V 2

= 290760V 2

= 7365027V 2 = 45.58 cm

As a result, the dry gas volume at STP is 45.58 cm 3.

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A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm, the density of lead  is mathematically given as

x= 11.30 g/cm^3

This is further explained below.

Generally, in order to determine the lead's specific gravity; To begin, we would use the formula to find out how much space the block of lead takes up;

Volume= length  * width  *  height

After plugging the values into the formula, we get the following:

Volume = 4.50 * 5.20 * 6.00

Volume = 140.4 cm^3

The next thing that we do is determine the density of lead;

After plugging the values into the formula, we get the following:

X = 11.30 g/cm^3

In conclusion, the density of lead is 11.30 g/cm^3

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CQ

A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.