how many molecules in 12 grams of h20

Atoms cannot be created or destroyed.

Atoms cannot be broken down into smaller pieces.

All atoms of an element are identical.

Chemical reactions cause atoms to be rearranged.

Electrons have a negative charge. Atoms usually contain an equal number of positively charged protons and negatively charged electrons. Protons and neutrons make up the atomic nucleus or nucleus, and small electrons cloud the nucleus. Protons and neutrons can be further broken down and both are made up of so-called quarks.

Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons. Atoms are the basic building blocks of matter. As far as we know, quarks cannot be broken down into smaller components making them the smallest we know of.

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Answer:

i think sulfur fluoride

The temperature at which the gas will occupy a volume of 2.5L is 472°C.

Charle's law states that "the volume of a fixed mass of gas held at constant pressure varies directly with the absolute temperature".

i.e we get [tex]$V_1[/tex]/[tex]$T_1[/tex] =[tex]$V2_1[/tex]/[tex]$T_2[/tex] .

Now, we have [tex]$V_1[/tex]= 1.0L, [tex]$T_1[/tex] = 25°C = (25+273) K = 298 K

                        [tex]$V_2[/tex]  = 2.5L, [tex]$T_2[/tex]  = ?

Let's substitute these values in the above equation,

[tex]$V_1[/tex]/[tex]$T_1[/tex] = [tex]$V_2[/tex]/[tex]$T_2[/tex]

1.0/298 = 2.5/[tex]$T_2[/tex]

[tex]$T_2[/tex] = 2.5 X 298

[tex]$T_2[/tex] = 745 K

OR

[tex]$T_2[/tex] = 745-273 = 472°C

Thus, the temperature at which the gas will occupy a volume of 2.5L is 472°C.

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Explanation:

Using Ideal Gas Equation

PV=nRT

P = 15.7, V = 50L, T = 21 +273= 294K, n=?, R= 0.8206atmK^-1mol^-1

n = PV/RT = (15.7 × 50) / (0.8206 × 294) = 3.25mol

n = m/M, m=?, M= 16(2) = 32, n = 3.25

m = nM = 3.25 × 32 = 104g

104 grams of oxygen (O2) gas are there in a 50.0 L tank at 21.0c when the oxygen pressure is 15.7 atm.

Ideal gas is also called as real gas. The ideal gas equation is PV = nRT. Where, P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

Ideal gas molecules do not attract or repel each other. The pressure of a gas times its volume same to the number of moles of the gas times a constant (R) times the temperature of the gas.

By using Ideal Gas Equation

PV = nRT

Pressure = 15.7,

Volume = 50L,

Temperature = 21 +273

= 294K,

n=?,

R= 0.8206atmK^-1mol^-1

n = PV/RT

= (15.7 × 50) / (0.8206 × 294)

= 3.25mol

n = m/M, m=?,

M= 16(2)

= 32, n = 3.25

m = nM

= 3.25 × 32 = 104g

Thus, 104g grams of oxygen (O2) gas are there in a 50.0 L tank at 21.0c when the oxygen pressure is 15.7 atm.

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Molecules can any forms of energy, except light energy.

The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.

Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.

Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.

Given options are-

A. light energy

B. Chemical energy

C. Sound energy

D. Kinetic Energy

Therefore, Molecules can any forms of energy, except light energy.

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Ether can only form one hydrogen bond per molecule.

We know that the hydrogen bond is the kind of bond that occurs when the dipole of water interacts with the dipole that is on another molecule. We can see this in a lot of hydrides of electronegative elements.

We can see that ether has only one electronegative atom and that is oxygen from the image that is shown in the answer. This oxygen atom can interact with the positive end of the dipole in only one water molecule at a time.

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Answer:

BeH2=sp

SF6=sp3d2

PO43−=sp3

PCl5=dsp3

Explanation:

The hybridization states of each of the central atoms are;

a) sp

b) [tex]sp^3d^2[/tex]

c)[tex]sp^3[/tex]

d) [tex]sp^3d[/tex]

When we talk about the idea of hybridization in chemistry what we are talking about is the way that there could be the mixing of the orbitals so that we could obtain the orbitals that have the kind of energy that is required for a reaction to occur.

In this case, we know that the hybridization of the central atom would determines the shape of the molecule and this is a very important thing to know.

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The equation for cellular respiration is in the given choices is option A. oxygen + sugar → carbon dioxide + water

Cellular respiratory is a chain of chemical reactions that smash down glucose to produce ATP, which may be used as power to energy many reactions throughout the body. There are 3 predominant steps of mobile respiratory: glycolysis, the citric acid cycle, and oxidative phosphorylation.

Cellular respiration is the process by the way which organic fuels are oxidized in the presence of an inorganic electron acceptor along with oxygen to provide massive quantities of power, to power the bulk manufacturing of ATP.

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Answer: C

l

2

→

H

C

l

O

C

l

2

→

2

H

C

l

O

(Cl balance)

C

l

2

+

2

H

2

O

→

2

H

C

l

O

(O balance)

C

l

2

+

2

H

2

O

→

2

H

C

l

O

+

2

H

+

(H balance)

C

l

2

+

2

H

2

O

→

2

H

C

l

O

+

2

H

+

+

2

e

−

(Charge balance)

C

l

2

+

2

H

2

O

→

2

H

C

l

O

+

2

H

+

+

2

e

−

balanced half-reaction)

Explanation:

the temperature of gas is [tex]4.14^{o}[/tex]K

The temperature can be calculated as follows:

we using the ideal gas Law where PV = nRT, we just need to subtitute the value

PV = nRT where the universal gas constant is 0.082[tex]L.atm.mol^{-1}.K^{2}[/tex]

1.3 atm x 1.7 L = 6.5 moles x 0.082[tex]L.atm.mol^{-1}.K^{2}[/tex] x T

T= [tex]\frac{1.3 atm X 1.7 L }{6.5 X 0.082 L.atm.mol^{-1}K^{-1} }[/tex]

T= [tex]4.14^{o}[/tex]K

hence the temperature of gas in K is [tex]4.14^{o}[/tex]K

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The number of mole of O₂ produced from the decomposition of H₂O₂ is 0.0033 mole

We'll begin by obtaining the mole of H₂O₂ that decomposed. This is obatined as follow:

PV = nRT

Divide both sides by RT

n = PV / RT

n = (0.978 × 0.082) / (0.0821 × 300)

n = 0.0033 mole

Finally, we shall determine the number of mole of O₂ produced. This is illustrated below

H₂O₂ -> H₂ + O₂

From the balanced equation above,

1 mole of H₂O₂ decomposed to produce 1 moles of O₂

Therefore,

0.0033 mole of H₂O₂ will also decompose to produce = 0.0033 mole of O₂

Thus, number of mole of O₂ produced from the reaction is 0.0033 mole

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The mass of oxygen gas consumed if 5.30 g of ethanol is involved in the reaction would be 3.68 grams.

The souring of wines through the reaction of the ethanol component with oxygen is a chemical reaction that is expressed by the following equation:

[tex]CH_3CH_2OH + O_2 -- > H_2O + CH_3COOH[/tex]

The equation already obeys the law of conservation of mass. Thus, it is a balanced reaction in which the mole ratio of the ethanol that reacts and the oxygen that is consumed is 1:1.

If, mole = mass/molar mass; the mole of 5.30 g of ethanol can be deduced as follows:

Molar mass of ethanol = 46.07 g/mol

Mole of 5.30 g ethanol = 5.3/46.07

                                      = 0.1150 mol

Since the mole ratio of ethanol and oxygen is 1:1, the equivalent mole of oxygen that is consumed in the reaction would also be 0.1150 mol.

If, mass = mole x molar mass; then the mass of 0.1150 mol oxygen can be deduced as follows:

Molar mass of oxygen = 32 g/mol

Mass of 0.1150 mol oxygen = 0.1150 x 32

                                             = 3.68 grams

Thus, the mass of oxygen that will be consumed by the reaction of 5.30 grams of ethanol is 3.68 grams.

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The final volume is 30.62L

Volume is the amount of space occupied by a three-dimensional figure as measured in cubic units

Here given data is

NH₄NO₃ = 17.5 g

Concentration = 1.75 M

We have to calculate final volume solution = ?

So Concentration = mass/volume

Volume = concentration × mass

Volume =  1.75 M ×  17.5 g

Volume = 30.62L

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Taking into account the definition of molarity, the concentration of the NaCl solution is 0.576 moles/L.

Molarity is a measure of the concentration of a solute that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles of solute÷ volume

Molarity is expressed in units moles/ L.

In this case, you know that:

Replacing in the definition of molarity:

molarity= 0.144 moles÷ 0.250 L

Solving:

molarity= 0.576 moles/L

Finally, the molarity in this case is 0.576 moles/L.

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The formulas below correctly represent the ionic compounds of the elements involved in CSCI Na3P Al2S3.

For binary ionic compounds, the compounds are named by writing the cation name first, followed by the anion name. For example, KCl, an ionic compound containing K+ and Cl- ions, is called potassium chloride. Consider the electronegativities of two related atoms. The greater the difference, the more ionic the bond.

For a compound as a whole, its polarity can be considered from the configuration of the polar bonds through the molecular conformation. An ionic bond is formed when an electron moves from one atom to another. Ions of different elements can be combined by forming ionic bonds. Cations and anions are formed when atoms lose or gain electrons.

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Answer:

explain how the electron was discovered

The direction of polarity of C-N is C to N

The direction of polarity of  F-N is N to F

The direction of polarity of F - C is is C to F

The direction of polarity in C - N is from C to N. the Nitrogen is more electronegative than the carbon. the carbon gets partially positive charge and the nitrogen gets partially negative charge.

The direction of polarity in F - N is from nitrogen to fluorine. the fluorine is more electronegative than the nitrogen so nitrogen gets partial positive and F have partial negative.

The direction of polarity of F - C is from carbon to fluorine because fluorine is more electronegative than carbon.

Thus, The direction of polarity of C-N is C to N

The direction of polarity of  F-N is N to F

The direction of polarity of F - C is is C to F

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There is no reaction between zinc II sulfate and magnesium sulfate.

We know that a reaction is said to occur when two species are combined and there are new products that appear in the system. This implies that if there are no new substances that appear in the system we can not say that a chemical reaction has taken place.

In this case, we can see that we can not be able to observe any change when wee mix a solution of magnesium sulfate and zinc II sulfate since the both of them have the same anion.

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1 is the maximum number of electrons in an atom that can have the follow set of quantum numbers.

According to Pauli's Exclusion Principle, no two electrons in the same atom can have the same values for all four of their quantum numbers. In other words, no more than two electrons can occupy the same orbital at the same time, and the spins of two electrons in the same orbital must be opposite. Bosons include photons, gravitons, and gluons.

Quantum numbers are the set of numbers used to describe the position and energy of an electron in an atom. There are four types of quantum numbers: principal, azimuthal, magnetic, and spin. There are four quantum numbers in atoms: the principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (ml), and electron spin quantum number.

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88 is the nearest whole number [tex]88\frac{196}{480}[/tex].

Rounding is a process to estimate a certain number in a context. To determine how to round a number, look at the next digit in the appropriate position; if it is less than 5, round down, and if it is more than 5, round up.

The major figures of a particular number are those key or significant digits that accurately represent the meaning of the number.

[tex]88\frac{196}{480}[/tex] is mixed friction.

Changing the mixed fraction into improper fraction number by :

Multiplying 88 × 480 = 42,240

Adding 196 to this number = 42240 + 196

= 42,436/480

= 88.40

≈ 88

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Answer: graduated cylinder: 4.25

Explanation:

Answer:

There are a few key factors to consider when designing a successful supply drop for Futura Amplify:

1. Make sure the drop is easily accessible for the intended recipients. If it is too difficult to reach, they may not be able to get to it in time.

2. Make sure the drop is large enough to accommodate the supplies you are sending. If it is too small, the supplies may not fit and may be lost or damaged.

3. Make sure the drop is well-protected from the elements. If it is exposed to the elements, the supplies may be damaged or lost.

Explanation:

Make sure the recipients of the drop can easily access it.

Amplifier is defined as a piece of electrical equipment that reacts to a variety of tiny input signals like power, voltage, or current. To raise a signal's amplitude, amplifiers are used in computers, audio equipment, music equipment, and electronic devices like television and radio receivers.  Without altering the frequency or wave shape of the waveform, an amplifier is used to boost the amplitude of a signal waveform.

They might not be able to get there in time if it is too challenging to get to. To ensure that the materials you are shipping fit, make sure the drop is big enough. The materials might not fit and could be damaged or lost if it is too tiny. Ensure that the drop is adequately shielded from the elements. The goods could become lost or destroyed if they are exposed to the elements.

Thus, make sure the recipients of the drop can easily access it.

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The weak (monoprotic) acid splits into its conjugate base and a proton; because the protons originated from the weak acid, the conjugate base that forms must be equimolar with the protons released into the solvent.

HA⇌A +H+

How can you tell whether kind of acid is a weak acid?

Based on its molar mass, pKa (determined from points on a titration curve), combined with its approximative melting point, you can determine your weak acid.

How can the concentration of an unidentified weak acid be determined?

Purpose: Titration with a standardized NaOH solution is used to determine the composition and identity of an unknown weak acid. where Mt is the titrant's concentration, Vt is its volume, and added titrant, Mx is the amount of the unidentified weak acid that is titrated, Mx is its concentration, and Vx is its volume.

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Answer: 9.36 × 10^-10

Explanation:

Answer: 9,36 x 10^-12

Explanation:

the a has to be in the range of 0 - 10

to get to 0.000 000 000 936 you have to divide 9,36 by 10, 12 times. As the expression goes.

Hope this was alright :)

Answer:

Explanation:

tt

The color of marker that is the least polar is the red dye because it shows the least interaction with the polar chromatography paper and the most interaction with the non-polar solvent.

The dyes that are most likely in the unknown sample are the blue and yellow dyes because the two spots produced by the unknown sample traveled almost the same distance as the blue and yellow dyes.

The most likely color of marker that the student tested is yellow.

Chromatography is a separation technique used to separate colored substances by means of their interactions with mobile solvent phase and a non-mobile solid phase.

The dye that has the most interaction with the solvent phase will travel farther in the chromatographic column whereas the dye that has the least interaction with the solvent will travel the least distance.

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The mass of the precipitate that can be recovered from the reaction is 2.2 g

We know that we have to obtain the number of moles of both of the reactants and then this would help us to determine the limiting reactant. When we determine the limiting reactant, we can now use it to obtain the theoretical yield of the reaction and this would help us to be able to get the actual yield which is what the question is about.

Number of moles of barium chloride = 25/1000 * 0.5 = 0.0125 moles

Number of moles potassium sulfate= 50/1000 * 0.25 = 0.0125 moles

Given that the reaction is 1:1, we can see that the theoretical yeild of the barium sulfate product is obtained from;

Theoretical yield= 0.0125 moles * 233 g/mol = 2.9 g

We already know that the formula to obtain the percentage yield is;

Actual yield/ theoretical yield * 100/1

We would now substitute the values and obtain; x/2.9 * 100 =75

Where x = actual yield of the reaction.

x = 75 * 2.9/100

x= 2.2 g

Thus we obtain 2.2 g.

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PHYSICAL CHANGE:

A change that does not involve the formation of new substances.

-------------------------------------------------------------------------------------------------------------

Physical changes are not represented by equations because they do not involve the rearrangement of atoms. Since no new substances are formed, this means that the atoms of the substance are not broken, changed, or rearranged. Unlike chemical changes, physical changes involve a change in the state of matter. For example, the crushing of a soda can. The physical appearance of the object itself changed, but no new substances were created and there weren't any changes to that object's molecular structure, therefore, those changes cannot be represented by equations.

Hope that helps and good luck!

The approximate diameter of each cell, given the number of cells and the diameter of the field of view, is c) 500 µm.

Cells are very small organisms and so they are measured in small units called micrometers. Micrometers are 1, 000 times smaller than millimeters. The diameter of the field of view is 1. 5 millimeters which means that combined, the diameter of these three cells will add up to 1. 5 millimeters in total.

Because cells have their diameter measured in micrometers, there is a need to convert the diameter of the field of view, from millimeters to micrometers:

= 1. 5 millimeters x 1, 000 micrometers per millimeter

= 1, 500 micrometers

The approximate diameter of each of the three cells is therefore :

= Diameter of the field of view / Number of cells

= 1, 500 micrometers / 3

= 500 micrometers

= 500 µm

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