Please look at the picture attached. If you understand it, it would be nice because I have a Science quiz tomorrow!

Answer:

[Ne] 3s² 3p³

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Answer:

Kinetic energy

Explanation:

Gravitational potential energy changes into kinetic energy. The equation for gravitational potential energy is GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on Earth), and h is the height above the ground in meters

Answer:

1.  7 ,   2.  0 crackers, 6 choc pieces and 1 marshmallow

Explanatio

Answer:

they have same number of electrons

Answer:

Acid

Explanation:

The given structure is that of formaldehyde.

Formaldehyde is a weak acid (pH = 3.5 / 3).

______

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Answer:

0.500

Explanation:

We presume your "centroid ratio theorem" tells you that AG = 2·DG, so ...

 (x+7) = 2(x -15)

 x + 7 = 2x - 30 . . . . eliminate parentheses

 37 = x  . . . . . . . . . . .add 30-x

Then AG = 37+7 = 44

and DG = 37-15 = 22.

Of course, AD = AG +GD = 44 +22 = 66

Answer:

an  alternative fuel is any automotive fuel other than gasoline and diesel fuel

Explanation:

Answer:

"cis" (Latin for Side)

Answer:

= 0.28M

Explanation:

data:

volume = 0.250 L

           = 0.250dm^3                       ( 1litre = 1dm^3)

moles = 0.70 moles

Solution:

      molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]

                 = 0.70 / 0.250

    molarity = 0.28 M

when a solid is dissolved in a liquid the vapor pressure of the liquid is decreases because the surface area from which molecules can evaporate is reduced

These are physical properties of solution that changes with the addition of solute , i.e. colligative properties are different for pure solvent and for solution which has solute .

those properties of a solution is a colligative property if it depends only on the ratio of the number of particles of solute and solvent in the solution, not the identity of the solute.

When a solute is added to the solvent, some of the solute molecules occupy the space near the surface of the liquid,

When a solute is dissolved in a solvent, the number of solvent molecules near the surface decreases, and the vapor pressure of the solvent decreases.

This has no effect on the rate at which solvent molecules in the gas phase condense to form a liquid.

But it decreases the rate at which the solvent molecules in the liquid can escape into the gas phase.

As a result, the vapor pressure of the solvent escaping from a solution should be smaller than the vapor pressure of the pure solvent.

Therefore when a solid is dissolved in a liquid the vapor pressure of the liquid is decreases because the surface area from which molecules can evaporate is reduced

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All metal nitrates are soluble in water, how are you going to do that?

But just for a theoretical exercise:

2AgNO3(aq) + Cu^2+(aq) >>>> 2Ag+(aq) + Cu(NO3)2

2 moles of silver nitrate produce 1 mole of copper nitrate.

Therefore 3 moles would produce 3/2 moles of copper nitrate.

Explanation:

The increasing order of the freezing point of the compounds are 0.10 M ethanol <  0.10 M CaCl2 < 0.10 M MgSO4​.

The freezing points of ethanol, calcium chloride and magnesium sulfate is determined as follows;

Thus, the increasing order of the freezing point of the compounds are as follows;

0.10 M ethanol <  0.10 M CaCl2 < 0.10 M MgSO4​.

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Answer:

nice

Explanation:

you can do it just try your best

The statement, that describe an isomer of a compound with an empirical formula of C₄H₁₀O₃ is "CHO."

The empirical formula of an organic compounds is the lowest whole number ratio of atoms contained in the substance, as defined in chemistry. The empirical formula gives the minimal ratio of the number of various atoms that existing. It's an empirical formula, if the formula is shortened, whereas not the exact number of atoms in the molecule, The given isomer of a compound is C₄H₁₀O₃. For this isomer, CHO is the empirical formula.

Hence, the correct answer is CHO.

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3 moles of I2 will be formed from 3 moles of chrlorine gas.

Explanation:

This is because, when you balance the given equation it allows for the mole ratio between the two given elements to be 1:1 so therefore 3 moles of chlorine gas will produce 3 moles of I2.

The number of micrograms of contaminant each person will receive is 5,742.64 ug.

The number of micrograms of contaminant each person will receive is calculated as follows;

Amount of contaminant (mg) = (1.01 x 10⁻⁴ mg/mL) x 2.28 x 10⁴ L

Amount of contaminant (mg) = 2.3028 mg.L/mL

Amount of contaminant (mg) = (2.3028 mg.L/mL) x (1000 mL/L) = 2,302.8 mg

Amount of contaminant (ug) = 2,302.8 mg x 1000 ug/mg = 2,302,800 ug

=  (2,302,800 ug) / (401 persons)

= 5,742.64 ug per person

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Answer: The pull of the moon's gravity on Earth's water causes tidal bulges to form on the side closest to the moon and farthest from the moon. In the place where there are tidal bulges, high tide occurs along coastline.

Explanation:

The composition of the stack gas are :

[tex]CH_4[/tex]= 0.8713

[tex]C_3H_8[/tex] = 0.0202

CO = 0.107

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of [tex]CH_4[/tex] : 70% of 100 g = 70 g

Mass of [tex]C_3H_8[/tex] : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of [tex]CH_4[/tex] : [tex]\frac{70 g}{16.04 g/mol}[/tex] = 4.3 mole

Number of moles of [tex]C_3H_8[/tex]: [tex]\frac{15 g}{144.1 g/mol}[/tex] = 0.10 mole

Mass of CO : [tex]\frac{15 g}{28.01 g/mol}[/tex] = 0.53 mole

Now to calculate the mole fraction of each we use the formula:

Mole fraction of [tex]CH_4[/tex]: [tex]\frac{4.3}{4.935}[/tex] = 0.8713

Mole fraction of [tex]C_3H_8[/tex] : [tex]\frac{0.10}{4.935}[/tex] = 0.0202

Mole fraction of CO : [tex]\frac{0.53}{4.935}[/tex] = 0.107

Hence, composition of the stack gas are:

[tex]CH_4[/tex] = 0.8713

[tex]C_3H_8[/tex] = 0.0202

CO = 0.107

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Since  the molecules tend to coalesce but still slide past one another, the substance was changed from gas to liquid.

The term phase change refers to a change from one state of matter to another. Now we know that one of the effects of heat is a change of state.

Hence, when heat is withdrawn, the molecules tend to coalesce but still slide past one another. This implies that the substance was changed from gas to liquid.

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Answer: Choice 3: O

Explanation:

EDG FINAL

Titration is used to describe a situation in which an acid is added slowly into a base to determine the amount of acid present.

The term titration is used to describe a situation in which an acid is added slowly into a base and the amount of acid is determined from the volume of  acid used.

We must note that the volume of acid is always the average volume of acid used and it can be used to compute the number of moles of acid. The question is incomplete as numerical values are not shown here.

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Answer:

Titration reveals that 12 mL of 1.5 M hydrochloric acid are required to neutralize 25 mL calcium hydroxide solution . What is the molarity of the Ca(OH) 2 solution

Explanation:

Answer:

Elements that occupy the same column on the periodic table

Answer:

Explanation:

In both of these reactions, the water acts as an acceptor of hydrogen ions, and is thus a base.

Answer:

The strong force binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks.

Answer:

Here, is the number of moles in the CO2. Substitute 0.20 g for weight and 44 g/mol for molecular weight of the CO2.

1 mol = 6.02.10²³ particles (atoms, molecules, ions)

mol CO₂ = 0.2 g : 44 g/mol = 0.0045

molecules = 0.0045 x 6.02 x 10²³ = 2.709 x 10²¹

Answer:

The hydrogen ion concentration in a solution, [H+], in mol L-1, can be calculated if the pH of the solution is known.

pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L-1 pH = -log10[H+] ...

[H+] in mol L-1 can be calculated using the equation (formula): [H+] = 10-pH