What is the speed of each vehicle? (Remember S=d/t)

A: 50 km/h, B: 40 km/h

A:5 km/h, B: 2 km/h

A: 10 km/h, B: 5 km/h

A: 20 km/h, B: 10 km/h

Answer:

I think its 1.72 (:

Explanation:

Answer:

The consequences of soil erosion go beyond the loss of fertile land. It has contributed to increased runoff and sedimentation in streams and rivers, clogging these waters and causing declines in fish and other animals.

We can protect the community from soil erosion by -:

Explanation:

SOIL EROSION -: The soil erosion mechanism is both natural and man-made. In nature, this refers to the removal of the top layer of soil caused by wind and water, while human activity may increase exposure to these elements.

MAJOR EFFECTS OF SOIL EROSION -:

PROTECTION OF COMMUNITY FROM SOIL EROSION -

Some of the effects of erosion on the environment includes :

Ways to protect the earth from soil erosion includes

Soli erosion is the washing away of the top soil of the earth's crust which can be caused by the movement of wind , water or ice over the surface of the earth crust. this action leads to the degradation of the soil

Soli erosion leads to the washing away of soil nutrients and the pollution of waterways because of the deposition of soil particles into the waterways.  the washed away soil can also block the drainages leading to a bigger problem ( flooding ).

Some of the steps that would help protect the soil from the effects of soil erosion are planting of cover crops , mulching and use of crush rocks on areas that are used most frequently to prevent the washing away of the soil.

Hence we can conclude that the effects of soil erosion are Washing away of soil nutrients , Pollution of the waterways, Blockage of drainages while ways to protect the earth from erosion are ;planting of cover crops, Mulching, use of crush rocks on certain areas

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Answer:

The molar mass of NaOH is 40.00 g/mol.

The number of moles of NaOH is equal to the ratio of its mass to molar mass.

The number of moles of NaOH =

40 g/mol

40 g

​

=1,000 mol

The molarity of NaOH solution is the ratio of number of moles of NaOH to total volume of solution in L.

M=

1 L

1 mol

​

=1 M

Explanation ;)

Answer:

stroke

Explanation:

Answer: Newtons Second Law states that acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated), the greater the amount of force needed to accelerate the object (bullet in our case). Everyone inherently knows that heavier objects require more force to move the same distance as lighter objects.

Explanation:

Answer:

The amount of salt solution.

Explanation:

so first you have to think about it as a y = mx + b function, where m and x are constants. So basically the independent variable is represented by the amount of salt solution because the health of the patient is affected by the amount of salt solution. this is how you would write it out as an equation so you can understand it better.

The Health of the patient   = The amount of salt solution + b

Since y depends on the values of m, x, and b, The amount of salt solution would be the independent variable.

The missing graph is in the attachment.

Answer: (a) [S] = 0.0016M

              (b) Vmax = 3V; Vmax = [tex]\frac{3V}{2}[/tex]; Vmax = [tex]\frac{11V}{10}[/tex]

              (c) Enzyme A: black graph; Enzyme B = red graph

Explanation: Enzyme is a protein-based molecule that speed up the rate of a reaction. Enzyme Kinetics studies the reaction rates of it.

The relationship between substrate and rate of reaction is determined by the Michaelis-Menten Equation:

[tex]V=\frac{V_{max}[S]}{K_{M}+[S]}[/tex]

in which:

V is initial velocity of reaction

Vmax is maximum rate of reaction when enzyme's active sites are saturated;

[S] is substrate concentration;

Km is measure of affinity between enzyme and its substrate;

(a) To determine concentration:

[tex]0.25V_{max}=\frac{V_{max}[S]}{0.005+[S]}[/tex]

[tex]0.25V_{max}(0.005+[S])=V_{max}[S][/tex]

[tex]0.00125+0.25[S]=[S][/tex]

0.75[S] = 0.00125

[S] = 0.0016M

For a Km of 0.005M, substrate's concentration is 0.0016M.

(b) Still using Michaelis-Menten:

[tex]V=\frac{V_{max}[S]}{K_{M}+[S]}[/tex]

Rearraging for Vmax:

[tex]V_{max}=\frac{V(K_{M}+[S])}{[S]}[/tex]

(b-I) for [S] = 1/2Km

[tex]V_{max}=\frac{V(K_{M}+0.5K_{M})}{0.5K_{M}}[/tex]

[tex]V_{max}=\frac{V(1.5K_{M})}{0.5K_{M}}[/tex]

[tex]V_{max}=[/tex] 3V

(b-II) for [S] = 2Km

[tex]V_{max}=\frac{V(K_{M}+2K_{M})}{2K_{M}}[/tex]

[tex]V_{max}=\frac{V(3K_M)}{2K_M}[/tex]

[tex]V_{max}=\frac{3V}{2}[/tex]

(b-III) for [S] = 10Km

[tex]V_{max}=\frac{V(K_{M}+10K_M)}{10K_M}[/tex]

[tex]V_{max}=\frac{V(11K_{M})}{10K_{M}}[/tex]

[tex]V_{max}=\frac{11V}{10}[/tex]

(c) Being the affinity between enzyme and substrate, the lower Km is the less substrate is needed to reach half of maximum velocity.

Km of enzyme A is 2μM and of enzyme B is 0.5μM.

Enzyme B has lower Km than enzyme A, which means the first will need a lower concnetration of substrate to reach half of Vmax.

Analyzing each plot, notice that the red-coloured graph reaches half at a lower concentration, therefore, red-coloured plot is for enzyme B, while black-coloured plot is for enzyme A

Answer:B

Explanation:

Answer:

chemically resistant

durable

non-reactive

easy to manufacture

Explanation:

Plastics are polymer materials which can be moulded or shaped into any desired shape when hot. There are two types of plastics; thermoplastics and thermo sets.

Most plastics are easily manufactured. They are light weight materials , chemically stable, durable and do not undergo chemical reactions upon prolonged exposure to the atmosphere.

The study of chemicals is called chemistry.

The correct answer is options B, C, and E

The plastic is made by the carbon by joining with itself by a covalent bond and this property of carbon is known as catenation.

In today's time plastic is used all over the world and it is because of the following reasons.

Hence, the correct answer is B, C, and E.

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Answer:

there are no term

Explanation:

what are the term

Answer:true

Explanation:

The neutrons and the protons are what stay there

Answer:

[tex]P_N=1.33atm\\\\P_O=0.67atm[/tex]

[tex]P_T=2.00 atm[/tex]

Explanation:

Hello.

In this case, the first step is to compute the moles of nitrogen and oxygen given their initial P, T and V conditions via the ideal gas equation:

[tex]n_{N}=\frac{P_{N}V_{N}}{RT} =\frac{2.00atm*24.0L}{0.082\frac{atm*L}{mol*K}*273K}\\ \\n_{N}=2.144molN\\\\n_{O}=\frac{P_{O}V_{O}}{RT} =\frac{2.00atm*12.0L}{0.082\frac{atm*L}{mol*K}*273K}\\ \\n_{O}=1.072molO[/tex]

After that, since the total volume now, once the mixture is formed is the addition between the initial volumes (12.0 L + 24.0 L) is 36.0 L, the partial pressure of each gas turns out:

[tex]P_N=\frac{2.144mol*0.082\frac{atm*L}{mol*K}*273K}{36.0L}\\\\P_N=1.33atm\\\\P_O=\frac{1.072mol*0.082\frac{atm*L}{mol*K}*273K}{36.0L}\\\\P_O=0.67atm[/tex]

Thus, the final total pressure is:

[tex]P_T= P_N+P_O=1.33atm+0.67atm\\\\P_T=2.00 atm[/tex]

Best regards.

Answer: The answer is “ By dissolving the same number of nmoles of each substance in the same volume of water ”

Explanation:

By dissolving the same number of moles of each substance in the same volume of water. Hence, option D is correct.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution.

Adding water to a solution and the number of moles of the solvent stay the same while the volume increases.

If there is no flow of solute into or out of the volume during the addition of the solvent, the number of moles of solute remains the same.

Hence, option D is correct.

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Velocity change increases as the force increases.

Even though this question is incomplete, but we can approach it from the stand point of Newton's second law of motion.

According to this law, force is directly proportional to change in velocity.

F = m(v - u)/t

F = force applied

m = mass of the body

v = final velocity of the body

u = initial velocity of the body

t = time taken

This means that velocity change increases as force increases.

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Answer:

Yes

Explanation:

Or maybe i dont really know what it mean

Answer:

• the warmth from the sun

• the heat from another a heater

• A cup of hot chocolate

•baking in an oven

Two everyday example that we say for the thermal energy of a substance being increased are, faster movement of the substances and boiling if liquids as well light absorption.

Thermal energy is a form of energy generated by heating up a substance. It can also be generated by the movement of its particles.

Vibrating molecules increases the thermal energy of a substance. Similarly, when we heat a substance it acquires more thermal energy.

Another way of increasing thermal energy is light absorption by the substance. Thermal energy associated with light increases the temperature of of the system which is absorbed the light.

Hence, the two ways by which thermal energy of a substance is increased are heating or boiling and faster movement.

To learn more about thermal energy, refer the link below:

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Answer:

The solution is acidic.

Explanation:

Answer:

H+ (aq) + OH- (aq) → H2O (l)

Explanation:

The net ionic equation is the main reaction going on in the system. The reaction between nitric acid and sodium hydroxide is a neutralization reaction.

In a neutralization reaction, the main reaction is the combination of hydrogen ions and hydroxide ions to form water. This reaction has been shown in the answer box.

Explanation:

1a) CaCO₃(s) → Ca²⁺(aq) + CO₃²⁻(aq)

1b) Remember, solids are not included in the equilibrium equation.

K = [Ca²⁺] [CO₃²⁻]

1c) Adding CO₃²⁻ ions will shift the reaction to the left, producing CaCO₃(s) until equilibrium is restored.

2) 2 SO₂(g) + O₂(g) → 2 SO₃(g)

Kc = 2.5×10¹⁰ = [SO₃]² / ([SO₂]² [O₂])

2a) SO₂(g) + ½ O₂(g) → SO₃(g)

Kc = [SO₃] / ([SO₂] [O₂]^½)

Kc² = [SO₃]² / ([SO₂]² [O₂])

Kc² = 2.5×10¹⁰

Kc ≈ 1.58×10⁵

2b) SO₃(g) → SO₂(g) + ½ O₂(g)

Kc = [SO₂] [O₂]^½ / [SO₃]

Kc = 1 / (1.58×10⁵)

Kc ≈ 6.33×10⁻⁶

2c) 3 SO₂(g) + ³/₂ O₂(g) → 3 SO₃(g)

Kc = [SO₃]³ / ([SO₂]³ [O₂]^³/₂)

Kc = ([SO₃] / ([SO₂] [O₂]^½))³

Kc = (1.58×10⁵)³

Kc ≈ 3.95×10¹⁵

3) H₂(g) + I₂(g) → 2 HI(g)

K = [HI]² / ([H₂] [I₂])

Make an ICE table.

[tex]\left[\begin{array}{cccc}&Initial&Change&Equilibrium\\H_{2}&0.400&-0.240&0.160\\I_{2}&1.60&-0.240&1.360\\HI&0&+0.480&0.480\end{array}\right][/tex]

K = (0.480)² / (0.160 × 1.360)

K = 1.06

Answer:

The oxygen atom has lone pairs of electrons.

Explanation:

Answer:

GDSSHCVJDJD

Explanation:

Answer:

option b is correct option = (6.76×10¹⁴ Hz)

Explanation:

Given data:

Wavelength of photon = 4.42×10⁻⁷ m

Speed of light = 2.99×10⁸ m/s

Frequency of radiation = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

Now we will rearrange this formula.

frequency  = Speed of wave / wavelength

f = c/ λ

f =  2.99×10⁸ m/s / 4.42×10⁻⁷ m

f = 0.676×10¹⁵ Hz   (s⁻¹ = Hz)

f = 6.76×10¹⁴ Hz

Thus option b is correct option.

Answer:

[tex]Kc=3.8x10^{-7}[/tex]

Explanation:

Hello.

In this case, for the chemical reaction:

[tex]2CH_3OH(l)+3O_2(g)\rightarrow 2CO_2(g)+4H_2O(g)[/tex]

We write the equilibrium expression including the gaseous or aqueous species only, that is why the methanol is not included due to heterogeneous equilibrium:

[tex]Kc=\frac{[CO_2]^2[H_2O]^4}{[O_2]^3}[/tex]

Whereas each gaseous species is powered to its stoichiometric coefficient (number before the species). In such a way, considering the equilibrium masses of carbon dioxide (44 g/mol), water (18 g/mol) and oxygen (32 g/mol) to be 1.56 g, 2.28 g and 3.33 g respectively, we compute the moles as we need molar concentrations in the equilibrium constant calculation:

[tex]n_{CO_2}=1.56g/(44g/mol)=0.0355mol\\\\n_{H_2O}=2.28g/(18g/mol)=0.127mol\\\\n_{O_2}=3.33 g/(32g/mol)=0.104mol[/tex]

Thus, into the 9.3.L vessel, the equilibrium concentrations are:

[tex][CO_2]=\frac{0.0355mol}{9.3L}=0.00382M[/tex]

[tex][H_2O]=\frac{0.127mol}{9.3L}=0.0137M[/tex]

[tex][O_2]=\frac{0.104mol}{9.3L}=0.0112M[/tex]

Therefore, the equilibrium constant shown with two significant figures is:

[tex]Kc=\frac{(0.00382M)^2(0.0138M)^4}{(0.0112M)^3} \\\\Kc=3.8x10^{-7}[/tex]

Best regards.

Answer:

[tex]\mathbf{FeCl_3}[/tex] is the lewis acid

[tex]\mathbf{CH_3COCl}[/tex] is the lewis base

Explanation:

The Lewis acid is a compound capable of accepting a doublet of electrons and which has an electronic gap on its valence layer.

The lewis base is a compound capable of donating a doublet of electrons.

A Lewis acid associates with a Lewis base through a covalent bond (sharing of two electrons between two atoms). The reaction between an acid and a Lewis base produces a compound called the Lewis adduct.

We can see the illustration of the diagrammatic expression in the image attached below.

Answer:

20 degree and 4000000N