the earth’s atmosphere contains about 0.04% (or 400 parts per million) carbon dioxide. although most of the carbon dioxide is in the form 12co2, which is not radioactive, a specific fraction of the total is made up of radioactive 14co2.

The H₃O⁺ is 0.380 M and  the pH of this solution is 0.420.

To calculate the [H₃O⁺] (hydronium ion concentration) of a polyprotic acid solution, we need to consider the ionization steps of the acid.

H₃PO₄ is a polyprotic acid that ionizes in multiple steps:

H₃PO₄ ⇌ H⁺ + H₂PO₄⁻

H₂PO₄⁻ ⇌ H⁺ + HPO₄²⁻

HPO₄²- ⇌ H⁺ +  PO₄³⁻

Since we are given the concentration of H₃PO₄, we can assume that it is fully ionized in the first step.

Therefore, the concentration of H⁺ from H₃PO₄ is equal to the concentration of H₃PO₄ itself.

[H₃O⁺] = [H⁺] = 0.380 M

So, the [H₃O⁺] is 0.380 M.

To calculate the pH of the solution, we can use the formula:

pH = -log[H₃O⁺]

pH = -log(0.380)

= -(-0.420)

= 0.420

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Calculate the [H3O+] of the following polyprotic acid solution: 0.380 M H3PO4. Express your answer using two significant figures. [H3O+] =

Calculate the pH of this solution. Express your answer using one decimal place. pH =

Answer:

20m/s

Explanation:

Given that :

Time, t = 2 seconds

Using the relation :

v = u + at

a = g is positive (downward)

V = final velocity

u = initial velocity = 0

v = u + gt

v = 0 + 10(2)

v = 20 m/s

Answer:

The earth's rotation, earth is rotating, so one side of earth will be hit by the sun, and the other wont be hit, making it dark, but since earth rotates, it causes it to turn, making one side have daylight, and the other, darkness, which the light you see is from the sun's reflection on the moon

Hope this helps

When light passes through a thin film of soapy water (n = 1.33) on plexiglass, there are several thicknesses of this film that will result in constructive interference.

Due to the light being a wave, it can create a constructive or destructive interference pattern.The thickness of the thin film of soapy water can be calculated by using the equation 2nt = mλ where n is the refractive index of the medium, t is the thickness of the film, m is the order of interference, and λ is the wavelength of the incident light.

If the thickness of the film satisfies the above equation, the light waves will interfere constructively, resulting in a bright spot.

The order of interference determines the location of the bright spot and is indicated by an integer value (m = 0, 1, 2, 3...).

The reason why soapy water forms a thin film on plexiglass is due to the adhesion and cohesive forces between the two.

The thickness of the film can be controlled by changing the concentration of soap in water or the angle of incidence of the light.

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Sodium hypochlorite (NaOCL) solution is available with 5 to 20% available chlorine. The correct answer is option b.

Sodium hypochlorite (NaOCL) solution is a commonly used disinfectant in various industries, including healthcare, food processing, and water treatment. The available chlorine concentration in the solution is an important parameter that determines its efficacy as a disinfectant. The answer to the question is (b) 5 to 20% available chlorine.

Sodium hypochlorite solutions with lower available chlorine concentrations (2 to 5%) are typically used for household cleaning and disinfection, while solutions with higher concentrations (50 to 70%) are used for industrial applications, such as water treatment. Solutions with 5 to 20% available chlorine are commonly used for disinfection in healthcare settings, such as hospitals and clinics.

It is important to note that the concentration of sodium hypochlorite solutions can vary between different brands and products. It is crucial to follow the manufacturer's instructions for dilution and use to ensure proper disinfection and safety. Also, it is important to handle sodium hypochlorite solutions with caution, as they can be corrosive and harmful to skin and eyes.

Therefore, option b is correct.

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The volume of the gas is obtained as 8.2 L

What is the volume of the gas?

We know that we can be able to obtain the volume  of the gas by the use of the process that can be identified with the ideal gas equation. In the ideal gas equation, we know that we can be able to see the relationship between the pressure, volume, temperature and number of moles of the gas.

Now we have to state out the parameters that have to do with the gas and we have the following;

Volume of the gas V = ?

Temperature of the gas T = 250 K

Gas constant R = 0.0821L⋅atm/mol⋅K,

Pressure of the gas P = 2.5 atm

We then have the formula for the ideal gas as;

PV = nRT

P = pressure

V = volume

R = constant

at = Temperature

Then we have;

V = nRT/P

V = 1 *  0.082 *  250/2.5

V = 8.2 L

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The two reasons Democritus’ ideas about the atom were NOT accepted are atoms are indestructible and they move in infinite space.

An atom is the smallest unit of ordinary matter that forms a chemical element.

Democritus believed that atoms were uniform, solid, hard, incompressible, and indestructible and that they moved in infinite numbers through empty space until stopped.

Differences in atomic shape and size determined the various properties of matter.

Thus, the two reasons Democritus’ ideas about the atom were NOT accepted are atoms are indestructible and they move in infinite space.

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Answer:

Explanation:

rift valleys are created when two tectonic plates diverge or move away from each other

mountians are created when two tectonic plates converge or move towards each other therefore the answer is rift valley

Answer:

i think is probably A

Explanation:

because at constant temperature, the product of the pressure and volume of a given mass of and ideal gass in a closed system is always constant

Answer:

I believe the answer is A or D

Explanation:

I hope this helps you out!

The empirical formula : C₁₁O₁₄O₃

The assumption of the compound consists of C, H, and O

mass of C in CO₂ =

\(\tt \dfrac{12}{44}\times 2.492=0.680~g\)

mass of H in H₂O =

\(\tt \dfrac{2.1}{18}\times 0.6495=0.072~g\)

mass of O :

mass sample-(mass C + mass H)

\(\tt 1-(0.68+0.072)=0.248`g\)

mol of  C :

\(\tt \dfrac{0.68}{12}=0.056\)

mol of H :

\(\tt \dfrac{0.072}{1}=0.072\)

mol of O :

\(\tt \dfrac{0.248}{16}=0.0155\)

divide by 0.0155(the lowest ratio)

C : H : O ⇒

\(\tt \dfrac{0.056}{0.0155}\div \dfrac{0.072}{0.0155}\div \dfrac{0.0155}{0.0155}=3.6\div 4.6\div 1\\\\\dfrac{11}{3}\div \dfrac{14}{3}\div \dfrac{3}{3}=11:14:3\)

When the density is measure , the correct is  c. the temperature should be specified.

The density is the ratio between the mass in the kg and the volume in the m³. The density of the graduated cylinder should be measure in the specified temperature. The expression for the density is expressed as follows :

The density = mass / volume

The density of the substance is measurement of the mass per unit the volume. The SI unit of the density is kg/m³, or we use g/cm³ for the solids, g/ml for the liquids, and the g/L for gases.

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The energy of a photon whose frequency is 5.94 × 10¹⁷ Hz is 3.94 × 10-¹⁶J.

The energy of a photon wave can be calculated by using the following formula:

E = hf

Where;

According to this question, a photon has a frequency of 5.94 x 10¹⁷ Hz. The energy can be calculated as follows:

E = 6.626 × 10-³⁴J/s × 5.94 x 10¹⁷ Hz

E = 3.94 × 10-¹⁶J

Therefore, 3.94 × 10-¹⁶J is the energy of the photon.

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The number of moles in container 2 is 33.3moles when the container has 27.32L of gas inside it

The number of moles of gas in container 2 can be calculated using the Ideal Gas Law:  

n = PV/RT  

where n is the number of moles of the gas with known volume,

P is the pressure (assumed to be 1 atm for ideal gases),

V is the volume (27.32 liters),

R is the ideal gas constant (0.0821 L·atm/mol·K) and

T is the temperature (assumed to be 273.15 K).  

Plugging in the values, we get:  

n = (1 atm)(27.32 L)/(0.0821 L·atm/mol·K)(273.15 K)

n = 33.3 mol  

Therefore, there are 33.3 moles of gas in container 2.

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Answer:

Number of moles = 2.72 mol

Explanation:

Given data:

Number of moles of H₃PO₄ present = ?

Molarity of solution = 18.1 M

Volume of solution = 150.0 mL (150/1000 = 0.15 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

By putting values,

18.1 M = number of moles / 0.15 L

Number of miles = 18.1 M × 0.15 L

Number of moles = 2.72 mol

Answer:

La masa de Bi (NO₃) ₃ producida es de aproximadamente 2.117,09 gramos

Explanation:

La ecuación química de la reacción se presenta como sigue;

2Mn (NO₃) ₂ + 5NaBiO₃ + 14HNO₃ → 2HMnO₄ + 5Bi (NO₃) ₃ + 5NaNO₃ + 7H₂O

La masa dada de Mn (NO₃) ₂ = 650 g

La masa de NaBiO₃ = 750 g

El número de moles de Mn (NO₃) ₂ = 650 g / (178.95 g / mol) ≈ 3.63 moles

El número de moles de NaBiO₃ = 750 g / (279.968 g / mol) ≈ 2.68 moles

Por lo tanto, el NaBiO₃, es el reactivo limitante, y el rendimiento teórico de Bi (NO₃) ₃ ≈ 5/2 × 2.68 = 6.7 moles

Dado que la eficiencia del proceso es del 80%, el rendimiento real de Bi (NO₃) ₃ = 0,8 × 6,7 moles = 5,36 moles de Bi (NO₃) ₃

La masa molar de Bi (NO₃) ₃ ≈ 394,98 g / mol

La masa de Bi (NO₃) ₃ = 394,98 g / mol × 5,36 moles ≈ 2,117,09 g

La masa de Bi (NO₃) ₃ produjo ≈ 2,117.09 g

Answer:

B-Sorry if this isn't right :/ Good luck.

Explanation:

Answer:

D. Scoot

Explanation:

Grew, Rude and truth all have the sound /OO/ scoot follows that pattern.

One example of particles that can be drawn closer to occupy a smaller volume is a gas.

In the gaseous state, particles have high kinetic energy and are not strongly attracted to each other. They move freely and randomly, colliding with each other and the container walls.

Since there are minimal intermolecular forces holding them together, gas particles can be compressed or drawn closer together by reducing the volume of the container.

By decreasing the volume of a gas, such as by compressing it in a cylinder or container, the particles have less space to move around. They collide with each other more frequently, increasing the frequency of intermolecular collisions. As a result, the gas particles are drawn closer together, and the overall volume occupied by the gas decreases.

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In scientific investigations, the effect of fertilizer on plant growth can be studied by examining various variables. Two key variables in this context are the presence or absence of fertilizer (independent variable) and the size or growth of the plant (dependent variable).

When investigating the effect of fertilizer on plant growth, the independent variable is the presence or absence of fertilizer. This variable is controlled by having two groups of plants: one group receiving fertilizer (experimental group) and another group without fertilizer (control group). By comparing the growth of these two groups, we can determine the impact of fertilizer on plant size.

The dependent variable, on the other hand, is the size or growth of the plant. This variable is measured or observed as the outcome of interest. In this case, it would be the height, weight, or overall size of the plants.

By systematically changing the independent variable (presence or absence of fertilizer), we can observe how it affects the dependent variable (plant growth). The experimental group receiving fertilizer is expected to show greater plant growth compared to the control group without fertilizer. This allows us to draw conclusions about the effect of fertilizer on plant growth.

However, it is important to note that the specific outcome may vary depending on other factors such as plant species, soil conditions, and environmental factors. Conducting a controlled experiment while considering these factors helps in obtaining more reliable results.

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Answer:

NO2=Nitrogen dioxide

KCL=potassium chloride

NH3=Ammonia

Q = mcΔt

Q = 50 g x 4.184 J/g°c (100 - 20)°C

Q = 16736 J

Answer:

Q = mcΔt

Explanation:

Specific heat capacity of water = 4.18 J °C g

Mass of water = 50g

Δt = 100 - 20 = 80°C

Q = (50) x (4.18) x (80)

Q = 16720 J is required to raise the temperature of the water

Answer: 1 mole carbon dioxide contains 6.02 x 1023 molecules.

Hope this helps!

Answer:

C=4 H=12

Explanation:

the 2 in front of the equation tells how many atoms there are the C2 and H6 tells you how much is in each atom, multiply to get the total

Answer:

ooooooooooo0000000000000

Answer:

0.0178

Explanation:

because you can work out the amount of moles in KOH using moles = mass/mr.

The mr of the KOH is 39.1+16+1=56.1 so you do

\( \frac{3}{56.1} \)

which equals to 0.053475 so u 3SF which is 0.0535moles

than u uses the molar ratio which is 3 to 1

so 0.0535÷3=0.0178 which is the moles of FeCl3.

hope this make sense:)

Answer:

6

What do AIA, SAG, AFP and AMA all stand for? Select four options.

American Institute of Architects

American Society of Mechanical Engineers

American Medical Association

Screen Actors Guild

Association for Finance Professionals

Professional Colleges

1. Adenine, cytosine, guanine, or thymine.

2. Calcium

3. They are many different radioactive heavy metals, but the most dangerous elements is arguably Polonium.

4. They are all odorless, colorless, monatomic gases with very low chemical reactivity.