The airbags that protect people in car crashes are inflated by the extremely rapid decomposition of sodium azide, which produces large volumes of nitrogen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid sodium azide () into solid sodium and gaseous dinitrogen. 2. Suppose of dinitrogen gas are produced by this reaction, at a temperature of and pressure of exactly . Calculate the mass of sodium azide that must have reacted. Round your answer to significant digits.

Answer: A

Explanation: the iron is liquid (so not D), it’s below the mantle but not above the crust (so not B &C)

the ph is gonna be your value and the 4 is gonna be your main subject

so as the ph is your value u gonna ad your ph and 7 and 4 toghter then multiple your answer 2 times  because ph represent multiple and your value  

Answer:

hardness and brittleness

Explanation:

mark me brainiest if I got it right

Answer:

Butanoic acid.

Explanation:

Answer: Ecosystem services are the flows of benefits which people gain from natural ecosystems, and natural capital is the stock of natural ecosystems from which these benefits flow. So, a forest is a component of natural capital, while climate regulation or timber might be the ecosystem service it provides.

Answer:

.✓is related to the solute content

✓gives information about potential changes in cell volume when cells are placed in that solution

√is related to membrane permeability to solutes.

Explanation:

Tonicity of a solution can be explained as how an extracellular solution can give room for the liquid to move in and out of the cell through osmosis.

It should be noted that Tonicity of a solution is

.✓is related to the solute content

✓gives information about potential

changes in cell volume when cells are placed in that solution

√is related to membrane permeability to solutes.

Answer:

The final temperature is 181.92°C

Explanation:

Given

Initial Temperature, T1 = 0°C

Initial Volume, V1 = 555mL

Initial Pressure, P1 = 80.0kPa

Final Volume, V2 = 1880ml

Final Pressure, P2 = 39kPa

Required

Determine the Final Temperature, T1

This question illustrates ideal gas law and will be solved using:

(P1 * V1)/T1 = (P2 * V2)/T2

But first, we need to convert temperature to degree Kelvin

T1 = 0°C = 273 + 0 = 273k

Next, we substitute values for P1, V1, T1, P2 and V2

THE EQUATION BEFOMES

(80 * 550)/273 = (1880 * 39)/T2

44000/273 = 73320/T2

Cross Multiply

44000 * T2 = 73320 * 273

44000T2 = 20016360

Solve for T2

T2 = 20016360/44000

T2 = 454.92K

Convert to degree Celsius

T2 = 454.92 - 273

T2 = 181.92°C

Hence, the final temperature is 181.92°C

The ideal gas law, also called the general gas equation, is the equation of the state of a hypothetical ideal gas.

The ideal gas law work under the constant:-

Hence the formula we gonna use is as follows:-

\(PV = nRT\)

In the question, the pressure, temperature, and volume are given in two different system

Hence it is equal to

\(\frac{PV}{T} = \frac{PV}{T}\)

Put the value given,

\(\frac{80*50}{273} = \frac{1880*39}{T}\)

Solving the equation, the value T will be:-

\(T2 = \frac{20016360}{44000}\)

=181.92C

The temperature given is 181.92C

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Answer:

evidence you see with your eyes

Explanation:

The change in the velocity = 4 m/s

Acceleration = 4 m/s²

Given

vo = initial velocity = 4 m/s

vf = final velocity = 8 m/s

t = 1 s

Required

The change in the velocity

Acceleration

Solution

the change in velocity =

\(\tt vf-vo=8-4=4~m/s\)

Acceleration = ratio of a change in velocity and the time

\(\tt a=\dfrac{\Delta v}{t}= \dfrac{vf-vo}{t}\)

Input the value :

\(\tt a=\dfrac{4~m/s}{1~s}=4~m/s^2\)

Answer:

6 N to the left, or -6 N
unbalanced

Explanation:

The forces are two 3 N forces. The forces are additive, so 3+3 = 6, so the answer is 6 N to the left.
Since the net force isn't 0, the forces are unbalanced (aka the block will move since there is a force pushing the block)

Answer:

which class are you please mention

The equation  in the question is: H+H → H + H Complete the equation by filling in the missing parts. missing part is  1 → H+H-2 → →3 → He.

The atomic number of hydrogen is 1, which means it has only one proton in the nucleus and one electron in its shell. Two hydrogen atoms react with each other to form helium. Helium has 2 protons and 2 neutrons in its nucleus and two electrons in its shell. Therefore, the equation is:

H + H → HeIt can be seen that:1. H + H (Reactants)

2. → (Yields or Reacts to form)

3. He (Product)Therefore, the tiles will be arranged as shown below: 1 → H+H-2 → →3 → He

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Ethanol has the chemical formula C2H5OH. There will be twice as many carbon atoms as molecules, or two at a time 7.65 times Ten to something like a total of around 23.

When diluted, alcoholic beverages contain ethanol. It is used as a topical therapy to combat staph infections as well as in cosmetics, fragrances, and medicinal compounds. Bioethanol, ethanol, and denatured alcohol are examples of monohydric solvents, each of which has just one hydroxyl group.

Corn is the most widely used ingredient in ethanol produced domestically. It can also be produced utilizing cellulosic feedstocks such crop waste and wood, however this is less common. The majority of ethyl acetate plants in the US have been situated in the Midwest due to their proximity.

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Answer:

In a lab, a student mixes 25.0 ml of 0.115 M aluminum sulfate with 34.0 ml of 0.0975 M Lead (III) nitrate. Calculate the grams of the precipitate that is formed.

Explanation:

The order of reaction must be determined experimentally or by calculation.

The order of reaction is the power to which a reactant must be raised in the rate law of the reaction. The rate law must be determined experimentally or by calculation. It can not just be deduced from the reaction equation.

In this case, the question is incomplete hence we can not deduce the order of reaction with respect to HCl. However, this order of reaction can be obtained by calculation.

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The volume of the 1.75 M H₃PO₄ solution required to neutralize 50 ml of 3.5 M Ca(OH)₂ solution is 66.67 mL

2H₃PO₄ + 3Ca(OH)₂ —> Ca₃(PO₄)₂ + 6H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(1.75 × Va) / (3.5 × 50) = 2/3

(1.75 × Va) / 175= 2/3

Cross multiply

1.75 × 3 × Va  = 175 × 2

5.25 × Va = 350

Divide both side by 5.25

Va = 350 / 5.25

Va = 66.67 mL

Thus, the volume of the H₃PO₄ solution needed is 66.67 mL

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The balanced chemical equation for the reaction between strontium and oxygen can be written as follows: 2 Sr (s) + \(O_2\)(g) → 2 SrO (s).

In this equation, solid strontium (Sr) reacts with gaseous oxygen (\(O_2\)) to produce solid strontium oxide (SrO).

To determine the mass of product expected to form in this reaction, we need to consider the molar ratio between strontium and strontium oxide. From the balanced equation, we can see that 2 moles of strontium react to produce 2 moles of strontium oxide.

The molar mass of strontium (Sr) is 87.62 g/mol, and the molar mass of strontium oxide (SrO) is 119.62 g/mol. Since the molar ratio is 1:1 between strontium and strontium oxide, the mass of strontium oxide formed will be equal to the mass of strontium used.

In this case, the student added 4.93 g of strontium to the crucible. Therefore, the expected mass of strontium oxide formed will also be 4.93 g.

It's important to note that this calculation assumes that the reaction proceeds to completion, meaning that all of the strontium reacts with oxygen. In actual laboratory conditions, the yield of the reaction may be less than 100% due to factors such as incomplete reaction, side reactions, or product loss.

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Answer:

Volume of bacteria cell into Pico liters = 60.27 Pico liters

Explanation:

Given:

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Find:

Volume of bacteria cell into Pico liters

Computation:

1 L = 10¹² Pico liters

So,

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Volume of bacteria cell = 6.027 x 10⁻¹⁰ x 10¹² Pico liters

Volume of bacteria cell into Pico liters = 60.27 Pico liters

Answer:

Zamir walked

27

meters and Talia walked

19

meters.

Explanation:

27 and 19

Answer:

zamir:27  Talia:19

Explanation:

i got it right on my test :)

Answer:

it should be rinsed to clean the glassware

The volume of the solution is 39.6 mL. Solutions can be formed by dissolving solids, liquids, or gases in a liquid solvent or by dissolving gases in a solid solvent.

What is Solution?

A solution is a homogeneous mixture of two or more substances in which the components are uniformly distributed on a molecular or ionic level. In a solution, the substance that is present in the largest amount is called the solvent, and the substance that is present in smaller amounts is called the solute.

We can use the following formula to calculate the volume of the solution:

Molarity (M) = moles of solute (n) / volume of solution in liters (V)

First, we need to calculate the number of moles of Cu(NO3)2:

mass of Cu(NO3)2 = 6.25 g

molar mass of Cu(NO3)2 = 187.56 g/mol (63.55 g/mol for Cu + 2x14.01 g/mol for N + 6x16.00 g/mol for O)

moles of Cu(NO3)2 = mass / molar mass = 6.25 g / 187.56 g/mol = 0.0333 mol

Next, we can rearrange the formula to solve for the volume of the solution:

V = n / M

V = 0.0333 mol / 0.840 M = 0.0396 L

Finally, we convert the volume to milliliters:

V = 0.0396 L x 1000 mL/L = 39.6 mL

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The density of 200 cm^3 of pure water is 200 g / 200 cm^3 = 1 g/cm^3, and  is the same as the density of 1 cm^3 of water.

b. A Corn syrup on top, water in middle, and olive oil on bottom because corn syrup has the highest density of 1.4 g/cm^3, followed by water with a density of 1 g/cm^3, and olive oil with a density of 0.85 g/cm^3.

So option A is correct.

Density is described as the substance's mass per unit of volume.

We were able to determine which substance will stay in its relative position using Archimedes' principle which states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces.

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The answers include the following below:

This is defined as the various ways in which heat moves from one body to another and is usually from a higher temperature to that of a lower temperature. This occurs so as to create an equilibrium or balance between the bodies involved. This is therefore the reason why there ius usually a uniform value gotten when they are left for a while,

Conduction is a method of heat transfer occurs when the bodies are in contact with one another such as between two metals who are in close proximity, Convection is also a method which occurs mostly in fluids such as air and water while radiation occurs in space such as between the sun rays and the earth.

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The choices are:

1. electromagnetic waves transfer energy through space to Earth

2. heat energy on Earth escapes into space

3. moves from warmer to cooler

4. touching, direct contact

5. warm air circulates towards cooler polar regions

6. flow of heat energy through liquids and gases

7. heat energy transferred

8. responsible for weather patterns on Earth

9. transfer of heat through soil by the movement of molecules

10. warm air in atmosphere rises and is replaced by cooler air

The reaction starts with 0.200 M A and 0.250 M B, the equilibrium concentration of C.3.63x10⁻¹⁰ M.

Chemical equilibrium is the state in which both the reactants and the products of a reaction are at a concentration that does not change over time any longer. In this condition, the forward and backward reaction rates are equal.

2A(aq) + B(aq) <==> C(aq)

Equilibrium expression is

K = [C] / [A]2[B]

Prepare an ICE table:

2A(aq)  +  B(aq) <==>  C(aq)

0.2..........0.15...............0........Initial

-2x...........-x.................+x......Change

0.2-2x....0.15-x............x........Equilibrium

Substitute in the equilibrium expression:

1.10x10⁻⁴ = (x) / (0.2-2x)2(0.15-x)  ... b/c K is small, we can essentially avoid using the quadratic as follows..

1.1x10⁻⁴  = x/(0.2)2(0.15)

x = (2.2x10₋⁵) (1.65x10⁻⁵)

x = 3.63x10⁻¹⁰  M = [C]

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Answer:

The correct answer is 4.16 grams.

Explanation:

Based on the given information, the concentration of KCl solution is 16 % m/v, which means that 100 ml of the solution will contain 16 grams of KCl.

The molarity of the solution can be determined by using the formula,

M = weight/molecular mass × 1000/Volume

The molecular mass of KCl is 74.6 grams per mole.

M = 16/74.6 × 1000/100

M = 16/74.6

M = 2.14 M

Now the weight of KCl present in the solution of 26 ml will be,

2.14 = Wt./74.6 × 1000 /26

Wt. = 4.16 grams

The best description of the relationship between population size, carrying capacity, and limiting factors is: "The size of a population usually stays near its carrying capacity due to limiting factors."

Carrying capacity refers to the maximum number of individuals that a particular environment can sustainably support. It represents the limit to which a population can grow given the available resources, such as food, water, and habitat. Limiting factors, on the other hand, are the factors that restrict population growth by reducing birth rates, increasing death rates, or limiting access to resources.As a population approaches its carrying capacity, limiting factors come into play and regulate the population size. These limiting factors can include competition for resources, predation, disease, availability of suitable habitat, and other environmental factors. They act as checks on population growth, preventing it from exceeding the carrying capacity of the ecosystem.

Therefore, the size of a population usually stays near its carrying capacity because the limiting factors ensure that the population does not exceed the available resources and ecological limits of the environment. If the population surpasses the carrying capacity, the limiting factors will intensify, causing a decline in resources and an increase in mortality rates, which ultimately brings the population back towards the carrying capacity.It's important to note that the relationship between population size, carrying capacity, and limiting factors is dynamic and can vary depending on various ecological and environmental factors.

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Answer:I'm going to give some fictitious values just so that we can get some perspective on the matter.

Let's say that the surface temperature of our sun is 10, the surface temp of the bigger star- the red giant formed from leaving the main sequence, has a temp of 0.2. of that- 2.

We can also say that the radius of our sun is 10, and the radius of the red giant is 1000. (100 times more)

Using the equation:

L

=

σ

A

T

4

σ

= The Stefan-Boltzmann constant =

5.67

×

10

−

8

But we can ignore the constant, as we are only interested in a ratio of these values.

L

S

u

n

=

4

π

(

10

)

2

×

10

4

=

1.26

×

10

7

L

S

t

a

r

=

4

π

(

1000

)

2

×

2

4

≈

2.01

×

10

8

2.01

×

10

8

1.26

×

10

8

≈

16

So the newly formed, red giant star is almost 16 times more luminous than the sun. This is owing to the increased surface area of the star due to the massively increased radius.

A small sidenote:

There is an equation that might be useful for comparing the radii, temperature and luminosity of main sequence stars. As red giants are not on the main sequence it could not be used here, but if you stumble across a question where they ask you to find the radius, luminosity or temperature given the other two, you can relate it to the sun's characteristics:

r

s

t

a

r

r

s

u

n

=

√

L

s

t

a

r

L

s

u

n

×

(

T

s

u

n

T

s

t

a

r

)

2

(I know, it's not a beauty to look at- but it works)

Where

X

s

u

n

is the radius, temperature, and luminosity of the sun. These are not often given in numerical values, but this equation serves well when asked to find e.g the radius of a star, in solar radii given that a star is twice as luminous and has 5 times the temperature of that of the sun.

Hence:

T

s

t

a

r

=

5

T

s

u

n

L

s

t

a

r

=

2

L

s

u

n

r

s

t

a

r

r

s

u

n

=

√

2

L

s

u

n

L

s

u

n

×

(

T

s

u

n

5

T

s

u

n

)

2

(cancel the common terms)

r

s

t

a

r

r

s

u

n

=

√

2

×

(

1

5

)

2

r

s

t

a

r

≈

0.057

r

s

u

n

(divide both sides by 0.0057)

17.5

r

s

t

a

r

≈

r

s

u

n

So the star's radius is almost 17.5 times that of the sun.

Hopefully, you find this info useful!

Explanation:

Answer:

6 metres per second squared

Explanation:

Gain in velocity = 60 - 30 = 30 m/s.

Time taken for this gain = 5 seconds

Average acceleration = 30 / 5 = 6 m/s/s.

So, 6 metres per second squared.

Answer:

Burning gasoline in a lawnmower is a chemical change.

Explanation:

Here, a combustion reaction takes place. Freezing water to make ice cubes, melting gold to make jewellery and boiling water for soup are examples of physical change since, only a change in physical state takes place.

Considering the Brønsted–Lowry theory, the conjugate base of HBrO₂ is BrO₂⁻.

A Brønsted-Lowry acid is any species capable of donating a proton (H⁺).

A Brönsted-Lowry base is a substance capable of gaining or accepting a proton (H⁺).

Then a proton transfer occurs that requires the presence of a proton donor, that is, an acid and a base that accepts them.

When an acid donates H+, the species that remains is called the conjugate base of the acid because it reacts as a proton acceptor in the reverse reaction. Likewise, when a base accepts H+, it becomes its conjugate acid.

Considering the definition of conjugate base, the conjugate base of HBrO₂ will be BrO₂⁻ because the Brønsted-Lowry acid, HBrO₂, donates an H⁺.

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