help please it’s due today

Answer:

Filtration is a process in which insoluble matter is separated from a liquid. Filtration is a separation process in which a mixture is passed through a filter that allows one component to pass-through but blocks another component from passing through because of its matter and consistency. Heterogeneous mixtures can be separated into their respective constituents. For example, a mixture of mud and water can be separated through filtration process easily, because water being liquid will pass through the filter paper easily but the mud will not because of it being solid

Answer:

Q1 b.

Q2 a

Q3. b

Explanation:

filteration= separate solids from liquids or gases using a filter medium.

The car acceleration form 0 to 1 will be 20 mph/s.

The rate at which an object's velocity changes with respect to time is called acceleration. Accelerations are measured in terms of vectors. The orientation of the force is acting on an item determines the orientation of its acceleration. Acceleration can be calculated by using this formula:

a = v-u/ΔT.

where, a = acceleration, v = final velocity, u = initial velocity and T is temperature.

Calculation of acceleration.

It is given that v = 20 , u = 0,

ΔT can be calculated as,

[tex]=T_{2} - T_{1} \\= 2-1\\ = 1[/tex]

Now , put the values given data in acceleration formula

a = 20-0/ 1

= 20 mph/ s.

Therefore, acceleration of car will be 20 mph/s.

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#SPJ2

Answer:

Both can react to form acidic compunds. Both are brittle.

Explanation:

Answer:

Explanation:

1 )

amount of heat required = mass x specific heat x rise in temperature

= 25 x 4.2 x 20 = 2100 J .

2 )

Amount of heat required

= mass x latent heat of vaporisation

= 50 x 2260 = 113000 J  .

3 )

Amount of heat required in melting the ice

= mass x latent heat of fusion

= 15 x 336 = 5040 J

4)

heat released in cooling water

= mass x specific heat x fall in temperature

= 5 x 4.2 x 10

= 210 J

5 )

amount of heat required = mass x specific heat x rise in temperature

84 = mass x 4.2 x 10

mass = 2 grams .

Answer:

False

Explanation:

Answer:

shorter wavelength = alpha wave

Explanation:

Given that,

The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz.

We need to compare the wavelengths of these two waves.

For alpha wave,

[tex]\lambda_1=\dfrac{c}{f_1}\\\\\lambda_1=\dfrac{3\times 10^8}{5}\\\\=6\times 10^7\ m[/tex]

For beta wave,

[tex]\lambda_2=\dfrac{c}{f_2}\\\\\lambda_2=\dfrac{3\times 10^8}{2}\\\\=15\times 10^7\ m[/tex]

From the above calculations, we find that the wavelength of the alpha wave is shorter than the wavelength of the beta wave.

Answer:

In ionic compounds, the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N

Explanation:

Answer:

the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N

Explanation:

Answer:

See explanation

Explanation:

The overall charge on ClO3−  is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.

This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .

The molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

When all the electrons of an atom are shared equally, the charge attained by the atom is known as a formal charge.

The formal charge can be calculated as:

Formal charge = valence electron - non-bonding electron - [tex]\rm \dfrac{bonding\;electron}{2}[/tex]

In the molecule, the formal charge of Oxygen = -1.

In the molecule, the formal charge of Chlorine = +2

The oxygen atom has 8 electrons, in which 2 are shared in the bond formation, and 6 electrons are valence electrons.

The chlorine atom has 7 valence electrons in which 6 electron pairs are shared with the oxygen atom, and 1 lone pair has been available with Cl.

The structure of [tex]\rm ClO_3^-[/tex] molecule has been given in the image attached. The image shows the available lone pairs and the bonding in the structure.

Thus, the molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.

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The elements that have least protons to those having the most protons in the atoms are:

B. C, Al, P, Cl

There is an equal number of protons and electrons in an atom. So when moving across a period in a periodic table the number of electrons increases which also shows the increases in a number of protons. So as the atomic number increases, the number of protons and electrons also increases.

Thus, the order of elements having least to greatest protons are:

C, Al, P, Cl

C has 6 atomic number, Aluminium has 13 atomic number , Phosphorus has 14 atomic number and atomic number of chlorine is 17.

Thus, option B is correct.

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Answer: B < C < A

Explanation:

Ok so things that have the lowest pka are the strongest acids. the higher the pka the less acidic it is.

Answer:

Number of candies

Explanation:

The independent variable in this experiment is the number of candies eaten by the student.

An independent variable is best pictured as the cause in an experiment. It is the reason why the effects in experiments are produced.

In this experiment, the hyperactivity is the hyperactivity is the dependent variable. It is the effect that is produced in this set up.

Answer:

Just to make it short, its eating a lot of candy

Explanation:

Answer:

D:2

Explanation:

H is hydrogen, and the subscript represents the amount of atoms it has so H2SO is two hydrogens

Answer:

D. 2 I think, not 100% sure.

Answer: 600K and 50kPa

Explanation:

600k as well as 50kPa since the pressure seems to be the lowest as well as the temperature is the greatest throughout this situation.

Under high temperatures and low pressures, actual gases behaved like ideal gases. such as the rule

Even though at high temperatures, the kinetic energy of such gas particles surpasses the intermolecular attractive forces, — in other words this same potential energy of something like the molecules (gaseous).

Thus the above answer i.e., "option 4" is right.

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Answer:

its minerals :)

Explanation:

i hope its right

alsooo heyyyy

Answer:

minerals!!!!! i think anyway

Explanation:

Answer:

I think it

C

because you cant view them with a naked eye

Answer:

It's funny cause i'm doing the same exact thing as you.

Explanation:

You need to go to the Gizmo, and it explains everything. But When you're looking at "Valence Electrons" thats how many "dots" (electrons) there are on the outermost circle, so Fluorine has 7 Valence Electrons.   To find the valency, you need to first identify the Valence Electrons. Fluorine has 7 valence electrons, and it would be a lot easier for this atom to gain an electron, rather than lose 7. So 8-7 is 1, meaning the Valency of Fluorine will be 1. For the sum, just add the total number, so 7+1 is 8, so the sum of Fluorine will be 8. This is confusing, so I'm sorry if this doesn't make sense.

Answer:

Explanation:

not sure if this is totally correct but checked with classmates and this seems to be around what most got

Answer:

Explanation:

C

The phrase to indicate the flood mitigation technique it describes are:

Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

Flood mitigation is the control and management of movement of the blood water.    

It includes flood gates and flood walls which manage the water of flood and prevent it from destroying building and homes.

There are different types of flood mitigation techniques for different areas.

Thus, Floodplain management – protects buildings in low-lying areas

stormwater management – reduces water runoff into streets, lawns, and other sites, and enhanced by the addition of urban green spaces.

Elevated structures-used mainly on the coast, raises structures above flood level.

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Flood mitigation manages and controls the flood water by removing inhabitants from the area.  Floodplain management protects buildings.

A flood mitigation is the control and management of the flood water by floodgates and floodwalls to prevent and protect the buildings and people.

The floodplain management of the mitigation technique involves the protection of low-lying buildings, stormwater management controls the flow of the floodwater flow in the streets and elevated structures are used in coastal regions to raise the level of the floodwater.

Therefore, different flood mitigation techniques are used to control and manage flood water.

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Answer:

triumph

Explanation:

Because women had been fighting so much that she feels triumphant that they will succeed and they are willing to continue until they reach success

Answer:

triumph

Explanation:

i got it right

if I am correct I think its I'm am not 100 percent sure but I think this should be the answer

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

Using the formula of gravitational attraction

F = G*M1M2/d²

where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²

M1 = 8000Kg

M2 = 1500 Kg

F =  6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)²

F = 3.56 * 10⁻⁴ N

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

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Answer: 10^-11

Explanation:

to find the concentration of H+ ions given the ph, we use the formula 10^(-pH).

so 10^-11

Answer:around 7

If your dish soap is labeled mild, gentle, or great for hands, chances are its pH level is somewhere right around 7. This mildness makes dish soap perfect for day to day cleaning. Most surfaces won't be damaged by dish soap, and there are a lot of places it can be used besides in the kitchen sink

Explanation: I have had this question before

Answer:

7

Explanation:

Considering that you use dish soap on a daily occurence... it is best for it to be versatile. By making it 7... it is very neutral.

This means it's not too acidic for some situations... nor is it too basic in other situations.

Answer:

E = 21.22 ×10⁻³⁶ J

Explanation:

Given data:

Energy of photon = ?

Frequency of photon = 3.2×10⁻² Hz

Solution:

Formula:

E = hf

h = 6.63×10⁻³⁴ Js

Now we will put the values in formula.

E = 6.63×10⁻³⁴ Js × 3.2×10⁻² Hz

E = 21.22 ×10⁻³⁶ J    (Hz= s⁻¹)

Answer:

Belong to the same group.

Explanation:

Different elements are most likely to react in similar ways when they belong to the same group.

This is because the elements in the same group always have similar number of valence electrons which implies that they all have the same number of electrons in their outermost shell. For example,barium (Ba), beryllium (Be), calcium (Ca), magnesium (Mg), radium (Ra), strontium (Sr) all have 2 electrons in their outermost shell and thus they belong to group 2 of elements which are known as Alkaline earth metals and they all tend to react in the same manner with other substances

The elements that has been belonging to the same group have been able to react in similar ways.

The reactivity of the elements has been based on the presence of the valence electrons. The elements that has been belonging to the same group have consisted of the same number of valence electrons with the increase in the number of shells moving from left to right.

Thus, the elements that have been belonging to the same group have consisted of the same reactive properties.

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Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{2 \times 99.9}{8} = \frac{199.8}{8} \\ = 24.975[/tex]

We have the final answer as

Hope this helps you

Answer:

25 atm

Explanation:

Hope I helped

Answer:

I think is D. The same atoms must be in the products and the reactants.

Explanation:

Explanation:

DThe same atoms must be in the products and the reactants.