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The statements which are true about heterogeneous mixtures are they settle out, they exhibit the tyndall effect and they exhibit brownian motion.

Heterogeneous mixtures are those mixtures in which composition of their constituent partiles are not identical or even, they may vary place to place.

Hence, options (1), (2) & (4) are correct.

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Answer:

A,B,D

Explanation:

i got it right

The affect of ground water depletion is Lower water level, Loss of vegetation and Wildlife disruption.

The amount of water that is present below the upper surface area of the land, which are not easily accessible is known as ground water.

And this ground water keeps the soil hydrated and responsible for good vegetation by providing many minerals through water, wildlife is also depends on the ground water as they provide survival for many species. If the ground water is deplected then it also affects the flow of streams and lower water level.

Hence option (d) is correct i.e. All of the above.

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Answer

D. All of the above

Explanation

The dissociation of a weaker acid can be suppressed or stopped by the addition of stronger acids which is known as common ion effect

Let's check about group || reagents

[tex]\\ \rm\rightarrowtail H_2S\longrightarrow H^++S^{2-}[/tex]

[tex]\\ \rm\rightarrowtail HCl \longrightarrow H^++Cl^-[/tex]

Here Hydrogen sulphide is neutralized by a stronger acid HCl

Answer:

b

Explanation:

because they can't change over 1 day it's takes time

Answer:

b

Explanation:

Answer:

viscosity

Explanation:

one one left is mercury and the other one is honey right?

Answer:

high surface tension versus low surface tension

Explanation:

hope this helps!^^

The value of the equilibrium constant for the reverse reaction is 5 × 10⁻⁶.

The equilibrium constant is the value of the reaction quotient at equilibrium.

Given that at a certain temperature, the value of the equilibrium constant, K, for the reaction represented above is 2.0 × 10⁵.

We require the equilibrium constant for the reverse reaction at the same temperature.

Let K' be the equilibrium constant for the reverse reaction.

So, we have that K' = 1/K

Substituting the value of K into the equation, we have

K' = 1/K

K' = 1/(2.0 × 10⁵)

K' = 1/2.0 × 1/10⁵

K' = 0.5 × 10⁻⁵

K' = 5 × 10⁻⁶.

So, the value of the equilibrium constant for the reverse reaction is 5 × 10⁻⁶.

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Answer: 2.576 kPa

Explanation:

Since the volume does not change, the formula: P/T = P/T can be used.

However, all temperatures must be in kelvin, so to convert the -62 Celsius add 273 and get: 211 K.

Now, plug in to the formula: 6.58 / 539 = P / 211 → Cross multiply and then divide to get: P = 2.576 kPa :)

Answer:

the other person gets brainliest <3

Explanation:

Answer:

the water evaporates

Explanation:

have a good day

Answer:

Massachusetts Institute of Technology

Summary:

A new surgical technique could allow prosthetic limbs to feel much more like natural limbs. Through coordination of the patient's prosthetic limb, existing nerves, and an artificial muscle graft, amputees would be able to sense where their limbs are in space and to feel how much force is being applied to them.

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Answer:

The function of tendons can be classified into two categories: tensile force transmission, and storage and release of elastic energy during locomotion. The action of tendons in storing and releasing energy is mainly seen in sports activities with stretch‐shortening cycles (SSCs). The more intense the SSC movements are (jumping‐like activities), the more frequently tendon problems are observed. High SSC movements impose high loads on tendons. Consequently, tendons that frequently deal with high SSC motion require a high energy‐absorbing capacity to store and release this large amount of elastic energy. As the elasticity of tendon structures is a leading factor in the amount of stored energy, prevention and rehabilitation programmes for tendon injuries should focus on increasing this tendon elasticity in athletes performing high SSC movements. Recently, it has been shown that ballistic stretching can significantly increase tendon elasticity. These findings have important clinical implications for treatment and prevention of tendon injuries.

Explanation:

Answer:

A, D

Explanation:

After one half life, 188mg

46.9 mg of Ba-142

After 5 half lives

After 106 minutes

20 half lives , only 0.000358 mg remains

Hope this helps

The given statement could be filled in as follows:

After one half-life, 188mg

46.9 mg of Ba-142 After 5 half-lives

After 106 minutes 20 half-lives, only 0.000358 mg remains.

Half-life is described as the meantime necessary of 1/2 of radioactive decomposition's sample to break up.

In the given study,

Amount of Radiocontrast dye [tex]= 375 mg[/tex]

Half-life [tex]= 10.6[/tex] minutes

Therefore,

The amount left post 1 half-life = 188 mg

Now,

The amount left post 5 half-lives [tex]= 46.9 mg[/tex]

Lastly,

The amount left post 20 half-lives [tex]= 0.000358 mg[/tex]

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Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Answer:

1.33 moles CO2

Explanation:

The number you are converting is 58.4 g CO2, so you start with this value. The conversion factor is 44.0 g/mol CO2. In order to cross out the grams, the grams must go on the bottom of the conversion factor.

                                  1   mol CO2      
58.4 g CO2   x   --------------------------    =    1.33 moles CO2
                              44.0   grams

The answer has three sig figs.

Answer:

This is because water molecules are made of atoms. Atoms may have special ends that attract to each-other magnetically, causing the water to look like it merges into 2 different drops.

Since rate of reaction depends on the surface area of the reactants,  lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium carbonate.

The rate of reaction is affected by many factors among which is the surface area of the reactants. We must note that the greater the surface area the quicker the rate of reaction.

As such, the surface area of the powdered sodium carbonate is greater than that of the lumps of sodium carbonate. Therefore, lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium carbonate. This is because the particles of the powdered sodium carbonate collide more easily with the acid molecules than the lumps of sodium carbonate.

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Answer:

3

Carbon readily forms ionic bonds with other carbon atoms.

Explanation:

Answer:

Acids, Bases, and the pH Scale

The terms acid and base describe chemical characteristics of many substances that we use daily. Acidic things taste sour. Basic or alkaline things taste soapy. Strong acids are corrosive and strong bases are caustic; both can cause severe skin damage that feels like a burn. However, mild acids and bases are common and relatively harmless to us. What makes a substance acidic or basic? The following equation is a good place to start:

2 H2O ⇌ 1 H3O+ + 1 OH-

We begin with two water molecules, and move some hydrogen atoms around. One water molecule gains a hydrogen and therefore takes on a positive charge, while the other water molecule loses a hydrogen atom and therefore becomes negatively charged. H3O+ is called a hydronium ion, and it makes things acidic. OH- is called a hydroxyl ion and it makes things basic. However, in water, there is a balance between hydroniums and hydroxyls so they cancel each others' charges. Pure water is neither acidic or basic; it is neutral.

So how does something become acidic or basic? That happens when the hydroniums and the hydroxyls are out of balance. If there are more positively charged hydroniums than negatively charged hydroxyls, then the substance is acidic. If there are more negatively charged hydroxyls than positively charged hydroniums, then the substance becomes basic. pH actually stands for the "potential (or power) of hydrogen."

Note: Sometimes people write H+ as a shorthand for H3O+ and that can cause confusion, because sometimes when people write H+ they really do mean only H+ and not H3O+. Watch out for that, and ask for clarification!

When we dissolve acids in water, we create an excess of hydroniums. When we dissolve bases in water, we create an excess of hydroxyls. Here are two examples. Vinegar, a weak acid, has a chemical formula of CH3COOH. When dissolved in water, it becomes CH3COO- and H+. The H+ ions combine with water molecules to form H3O+ so the solution becomes acidic. Now let's look at lye, a strong base with the chemical formula NaOH (sodium hydroxide). If we add NaOH to water, it dissociates into Na+ and OH-. The sodiums don't do anything important, but the hydroxyls make the solution more basic.

One last question: Why are strong acids and strong bases so nasty? It's because they are out of balance. They either have too many positive charges and are looking for negatives to get back into balance, or they have too many negative charges and are looking for positives to get back into balance. This makes them very reactive with anything they contact. When the positives and negatives are in equal number, they neutralize each other

Answer:

Incandescence is the emission of light caused by high temperature. ... Metals, such as aluminum, magnesium, and titanium, burn very brightly and are useful for increasing the temperature of the firework. Luminescence the emission of light by a substance that has not been heated.

Explanation:

The word incandescence refer to the light produce from heat. When solution is heated it will rise up the light scale through infrared, red and the rest of the color. Fireworks is create by controlling the amount of heat which keep it in one color.

Fireworks are a class of low explosive pyrotechnic device used for aesthetics and entertainment purpose.

They are commonly used in displays, combining a large number of devices in an outdoor setting.

With increase in sound level it can lead to restlessness, temporary or permanent hearing loss, high blood pressure and sleep disturbance.

Fireworks can also cause respiratory problems such as chronic or allergic bronchitis, asthma etc.

Fireworks release a fine cloud of smoke and particulate matter affecting local area quality.

Thus, the word incandescence refer to the light produce from heat. Fireworks is create by controlling the amount of heat which keep it in one color.

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Answer:

Covalent

Explanation:

Covalent Bonds. Another type of strong chemical bond between two or more atoms is a covalent bond. These bonds form when an electron is shared between two elements and are the strongest and most common form of chemical bond in living organisms.

The final temperature, in degrees Celsius, of the gas is 34.62 °C

From the question, we are to determine the final temperature, in degrees Celsius

From the Pressure law or Gay-Lussac's law

We have that, for a given mass and constant volume of an ideal gas, the pressure exerted on the sides of its container is directly proportional to its absolute temperature.

Using the formula,

[tex]\frac{P_{1} }{T_{1}} = \frac{P_{2} }{T_{2}}[/tex]

Where P₁ is the initial pressure

T₁ is the initial temperature

P₂ is the final pressure

and T₂ is the final temperature

From the given information,

P₁ = 739 mmHg

T₁ = 23 °C = 23 + 273.15 = 296.15 K

P₂ = 768 mmHg

T₂ = ?

Putting the parameters into the formula, we get

[tex]\frac{739}{296.15}=\frac{768}{T_{2} }[/tex]

Then,

[tex]T_{2} = \frac{768 \times 296.15}{739}[/tex]

T₂ = 307.77 K

Therefore,

T₂ = 307.77 - 273.15 = 34.62 °C

Hence, the final temperature, in degrees Celsius, of the gas is 34.62 °C

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Here is the complete question:

A gas sample has a pressure of 739 mmHg when the temperature is 23 °C. What is the final temperature, in degrees Celsius, when the pressure is 768 mmHg, with no change in the volume or amount of gas?

Answer:

number of protons in the nucleus, number of energy levels, and the shielding effect.

Explanation:

I hope this helps :)

Answer:

the specific combination of genes contained within the cell.

Explanation:

ex: AaBg

When you burned the chip, The original source of energy conversions was chemical energy. Which then converted to light, thermal, sound, and kinetic energy.

Answer:

I think you're supposed to answer that yourself because it's asking your personal opinion. I'd personally like to know in advance

1 mole of water are contained in the given sample of water of 18.00 grams.

Moles of any substance will be calculated as:

n = W/M, where

W = given or required mass

M = molar mass

In the question given that,

Molar mass of water H₂O = 18 g/mole

Given mass of water H₂O = 18 grams

Now we put all these values in the above equation, we get

Moles of H₂O = 18 grams / 18 g/mole = 1 mole

Hence, option (1) is correct, i.e. 1 mole of water is present.

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