Increasing ions in solution will decrease the pH of a solution, while increasing the. ions in solution will increase the pH of a solution. Fill the Blank
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Answer:

The answer is It recognizes specific common pathogens. :)

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Answer:

Number of valence electrons in two F atom = 2(7) = 14

Total number of valence electrons = 6 + 14 = 20 electrons

Placing a bonding pair of electrons between the atoms to form the chemical bonds.

Electrons used in bonding = 4

The remaining electrons are used as a lone pair for central or terminal atoms to achieve an octet to finish the Lewis dot structure.

Electrons used as a lone pair = 20 - 4 = 16

Explanation:

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The true statements is that nerve cells do not look like skin cells because they make up different organs and have different functions.

Cells are the basic functional and fundamental unit of any living organism.

Each and every cells that are present inside the body have same DNA, but they all have different function and different structures. As nerve cells are present only in the brain and spinal cord part and skin cells are present all over the body.

Hence both the cells are different as they have different functions.

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Answer:

50 years old

Explanation:

Antoine Lavoisier died by the guillotine at the age of 50 on May 8, 1794 in Paris.

Hope this helps...

- profparis

Answer:

Antoine Lavoisier died at the age of 50

Answer and Explanation: The answer is false.

Answer:

trueee is the answer heh need points

When a liquid is heated, the average kinetic energy of its particles will increase.

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.

Average kinetic energy = 3KT/2

If temperature increases, kinetic energy also increases.

Therefore, When a liquid is heated, the average kinetic energy of its particles will increase.

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Taking into account the ideal gas law and the definition of molar mass, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 [tex]\frac{g}{moles}[/tex].

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

In this case, you know:

Replacing in the ideal gas law:

1.25 atm× 3.21 L = n× 0.082 [tex]\frac{atmL}{mol K}[/tex]× 298 K

Solving:

n= (1.25 atm× 3.21 L)÷ (0.082 [tex]\frac{atmL}{mol K}[/tex]× 298 K)

n= 0.1642 moles

So, the number of moles in this case are 0.1642 moles.

In this case, you know:

Then, considering the definition of molar mass, it is calculated as:

[tex]molar mass=\frac{3.228 g}{0.1642 moles}[/tex]

Solving:

molar mass= 19.66[tex]\frac{g}{moles}[/tex]

Finally, the molar mass of a 3.228 g sample of a gas if it occupies 3.21 L at 298 K and 1.25 atm is 19.66 [tex]\frac{g}{moles}[/tex].

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Answer:

54 protons

Explanation:

51 electrons 'balance' the charge of 51 protons....but there is three more PLUS charges ......means three more protons

51 + 3 = 54

Answer:

There is no net loss of energy from the collisions.

Explanation:

Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions. Gas particles are small and the total volume occupied by gas molecules is negligible relative to the total volume of their container.

The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g

Zn + I₂ —> ZnI₂

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 254 = 254 g

SUMMARY

From the balanced equation above,

254 g of I₂ required 65 g of Zn

From the balanced equation above,

254 g of I₂ required 65 g of Zn

Therefore,

0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn

Thus, the minimum mass of Zn required is 0.128 g

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Answer: the interactions that are going on with the intermolecular. And depending how much space their is between each particle.

Explanation: Gases behave the least like ideal gases at low temperatures in high pressures because of the interactions that are going on with the intermolecular. And depending how much space their is between each particle. And whether the sizes are compared to small or large spaces are really insignificant.

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Answer:

14 mol O₂

Explanation:

The reaction between CO and O₂ is the following:

CO + O₂ → CO₂

We balance the equation with a coefficient 2 in CO and CO₂ to obtain the same number of O atoms:

2CO + O₂ → 2CO₂

As we can see from the balanced equation, 1 mol of O₂ is required to react with 2 moles of CO. Thus, the conversion factor is 1 mol of O₂/2 mol CO. We multiply the moles of CO by the conversion factor to calculate the moles of O₂ that are required:

28 mol CO x 1 mol of O₂/2 mol CO = 14 mol O₂

Answer:

C

Explanation:

because 37 does not end with 5 or 0, so it'd be harder to see if the water temperature is accurate if your thermometer goes up by 5s or 10s. And using D, the one that goes up by 20s is out of the question, it'd be too difficult to read. Using a thermometer that goes up by 1s is just best because you can be positive when the water is at 37°C

Answer:

b. 16 protons, 18 neutrons, and 18 electrons

Explanation:

Things to be remembered

Negative charge on any ionic species indicates gained the electrons

Positive charge on any ionic species indicates lost the electrons

A sulfur atom has 16 protons, 18 neutrons, and 16 electrons, A sulfide ion has a 2– charge which indicates that sulphur has gained two electron from any other atom, ion or species!

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Answer:

Its a chemical conducting electricity

Answer:

true

Explanation:

Answer:

dog

Explanation:

cats hide and break stuff pigs will probally stay outside all day and i ove dogs

I prefer a pig

Benefits of having a pig

- you can eat them

- they taste good

- they have bacon

- Richard

- they are good to eat

- they taste very good because of the bacon

- you can cook them

- they are good cooked

The products of this reaction between aluminum and sulfuric acid are two: hydrogen and aluminum sulfate.

This concept refers to the substances obtained at the end of the reaction.

It means to make sure there are the same molecules in the reactants and products.

2Al + 3H2SO4 = Al2 (SO4)3 + 3H2

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Answer:

mass is the amount of matter in an object

Explanation:

Answer:

95.965 grams

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of NH₃, then 3.4×10²⁴ molecules are contained in how many moles of NH₃?

amount of moles of NH₃= (3.4×10²⁴ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of NH₃= 5.645 moles

Being the molar mass of NH₃, that is, the amount of mass that a substance contains in one mole, 17 , then the amount of mass that 5.645 moles of the compound contain can be calculated as:

5.645 moles× 17=  95.965 grams

Finally, 95.965 grams of NH₃ are in 3.4×10²⁴ molecules of NH₃.

Answer:

Sift the mixture to separate the rock from the iron filings, soil and salt.

You can then use a magnet to separate the iron filings from the salt and soil.

Afterwards, you can pour water into the remaining salt- soil mixture. Salt will dissolve but the soil will remain at the bottom of the water.

If you want to separate the salt from the water, you can boil it till all the water evaporates. The only thing that'd be left in the pan is salt.

Answer:

3

Explanation:

the answer is 3 because it is 3 for the o2 so 3 you have to pay more attention for the small ditails

The mole fraction of the sulfur dioxide gas present in a falsk which contains 21.8 g of chlorine gas and 47.8 g of sulfur dioxide gas is 0.708.

Mole fraction of any substance will be calculated by dividing the moles of desired substance by the total moles of the species present in that sample.

Moles can be calculated as:

n = W/M, where

W = given mass

M = molar mass

Moles of 21.8g of chlorine gas = 21.8g / 71g/mol = 0.307mol

Moles of 47.8g of sulphur dioxide gas = 47.8g / 64g/mol = 0.746mol

Mole fraction of sulphur dioxide gas = 0.746 / 0.746+0.307 = 0.708

Hence required mole fraction of sulphur dioxide gas is 0.708.

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Answer:

the narrator means that before the universe was out forward to completion,

there were little things that came together to form other things

a typical example can be found in the big bang theory

Answer:The narrator is pointing out that energy is involved in every event, and each event can be described in terms of energy.

Explanation:

Inhibition of protein synthesis is the mode of action done by most antifungal drugs.

Antifungals drugs inhibit the synthesis of ergosterol the main fungal sterol, polyenes which interact with fungal membrane sterols and 5-fluorocytosine inhibits macromolecular synthesis.

So we can conclude that inhibition of protein synthesis is the mode of action done by most antifungal drugs.

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Answer:

concentration [H_3O^+][H3O+] decreased by 4.46334\sdot10^{-4}M.4.46334⋅10−4M.

Explanation:

pH=−log[H3O+]; [H_3O^+]=10^{-pH};[H3O+]=10−pH;

If pH=3.350;pH=3.350;

[H_3O^+]=10^{-3.35}=4.467\sdot10^{-4}M;[H3O+]=10−3.35=4.467⋅10−4M;

If pH=6.780;pH=6.780;

[H_3O^+]=10^{-6.78}=1.66\sdot10^{-7}M;[H3O+]=10−6.78=1.66⋅10−7M;

4.467\sdot10^{-4}-1.66\sdot10^{-7}=4467\sdot10^{-7}-1.66\sdot10^{-7}=4465.34\sdot10^{-7}=4.467⋅10−4−1.66⋅10−7=4467⋅10−7−1.66⋅10−7=4465.34⋅10−7=

=4.46534\sdot10^{-4}M;=4.46534⋅10−4M;

The positive difference in concentration of [[tex]H_3O^+[/tex]] is [tex]4.46534 X 10^{-4}M[/tex] when NaOH was added to a 7.75 x [tex]10^-3[/tex] M solution of HCl so that the end solution has a pH of 3.500.

It is the measure of how much of a given substance there is mixed with another substance.

pH=−log[[tex]H_3O^+[/tex]]

[[tex]H_3O^+[/tex]]=[tex]10^{-pH}[/tex]

[[tex]H_3O^+[/tex]]=[tex]10^-^p^H[/tex]

If pH=3.350

pH=3.350

[[tex]H_3O^+[/tex]]=[tex]10^{-3.35}[/tex]=[tex]4.467 X 10^{-4}M[/tex]

[[tex]H_3O^+[/tex]]=[tex]10^{-3.35}[/tex]

=[tex]4.467 X 10^{-4}M[/tex]

If pH=6.780

pH=6.780

[[tex]H_3O^+[/tex]]= [tex]10^{-6.78}[/tex]=[tex]1.66 X 10^{-7}M[/tex]

Hence, the positive difference in concentration of [[tex]H_3O^+[/tex]] is[tex]= 4.46534 X 10^{-4}M[/tex]

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Answer:

ion

Explanation:

more protons than electrons