What is the molarity of a NaOH solution if 25. 00ml is required to neutralize 40. 00ml of a 1. 50m solution of H2SO4

Answer:

Nucleus and mitochondria. Organism.

Explanation:

The two main organelles are the nucleus and the mitochondria . The nucleus is boss of the factory(controls everything). The mitochondria is the power house of the cell (provides the energy). Humans are organisms (made of organs systems working together) . Another example is plants they are also organisms

The number of atoms corresponding to the molecule is in the lower part of the atoms, when there is no number it will mean that the atom is present only once.

So, we have that in one molecule of NH4 there will be:

Outside the parentheses we see that there is a number two (NH4)2, this means that there are two molecules of NH4.

So we have:

And we have outside the molecule an atom of S

So, we have in total:

The answer will be the last one, 2-N, 8-H, 1-S

So,

There's an equation that we could use in order to find frequency, and it is the next one:

This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.

In this problem, we know the value of E and the value of h, so we need to solve for v:

Therefore, the correct answer option is A.

Answer:

540% according to an article I read on BBC

Explanation:

Answer:

creo q es electrico

Explanation:

The correct answer is (b) the rate of the overall reaction is slower than the slowest step.

In a multistep reaction mechanism, the overall reaction rate is determined by the slowest step, often referred to as the rate-determining step. The rate-determining step has the highest activation energy and limits the overall rate of the reaction. The other steps may occur more quickly, but their rates do not significantly affect the overall rate of the reaction. Therefore, the rate of the overall reaction is determined by the slowest step.

Hence, the correct answer is (b) the rate of the overall reaction is slower than the slowest step.

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The coupled G protein most likely interacts with this receptor at the loop between H5 and H6.

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Answer:

20 Km/hr

Explanation:

You have to divide the Km and Hr

I hope it help you

Answer: Mechanical energy usually means the sum of the kinetic energy and potential energy. So when you ride your bike you hope that the muscular (chemical) energy is converted mainly into mechanical energy.

Explanation:

Answer:

Isn't it neither.

Explanation:Because potential is going up and kinetic is going down.

Answer:

what is the question????

Answer:

10. it increases the boiling point because it is a stone bond and will require much energy to break it.

11.So, to boil liquid water, all hydrogen bonds have to be broken and it requires a large amount of energy. This isn't the case in HF; all hydrogen bonds need not to be broken, and therefore a lesser amount of energy is required. So HF boils at a much lower temperature as compared to water even though F has high electronegativity but the force of attraction or the intermolecular is is weak

The mass of the sample of the material is 0.1664 g.

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

By the formula of specific heat

\(Q = mc \Delta T\)

Given, that the specific heat (c) of material is 0.416 J/gC

The difference in temperatures is 30°C to 50°C

The mass=?

Q = heat, 50 J

Putting the values in the equation

\(\rm 50\;J = m \times 0.416 J/g^\circ C \times (50 - 30)\\\\m = \dfrac{0.416 J/g^\circ C \times 20}{50} = 0.1664 g\)

Thus, the mass of the samples is 0.166 g.

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A double displacement equation of silicon could be:
SiO_{2} + 2NaOH → Na_{2}SiO_{3} + H_{2}O

Silicon (Si) is a chemical element with the symbol Si and atomic number 14. It is a metalloid, which means it has properties of both metals and nonmetals. Silicon is commonly used in electronics and computer manufacturing because of its unique properties, such as its ability to conduct electricity and withstand high temperatures.
A double displacement reaction is a chemical reaction in which two compounds exchange ions or bonds to form two new compounds. In the case of silicon, a double displacement equation could be:
SiO_{2} + 2NaOH → Na_{2}SiO_{3} + H_{2}O
This equation represents the reaction between silicon dioxide (SiO_{2}), commonly known as silica, and sodium hydroxide (NaOH), commonly known as lye or caustic soda. In this reaction, the silicon dioxide and sodium hydroxide switch ions to form sodium silicate (Na_{2}SiO_{3}) and water (H_{2}O).

Overall, silicon plays an important role in many chemical reactions and industrial processes, and its unique properties make it a valuable material in various applications.

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A double displacement reaction involving silicon (Si) would typically involve a silicon compound reacting with another compound, causing the ions to exchange places.

An example equation is: SiCl₄ (aq) + 2NaOH (aq) → Si(OH)₄ (s) + 2NaCl (aq)
In this reaction, silicon tetrachloride (SiCl₄) reacts with sodium hydroxide (NaOH), resulting in the formation of silicon hydroxide (Si(OH)₄) and sodium chloride (NaCl) through a double displacement process. The  silicon plays an important role in many chemical reactions and industrial processes, and its unique properties make it a valuable material in various applications.

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Answer:

mud bricks.

Explanation:

Answer: Mud Bricks

Explanation: Fertile Crescent has important natural resources that encourage settlement including Mud

Answer:

4s

4p

4d

4f

these are the four quantum numbers

The two step synthesis 2‑hydroxy‑2,4‑dimethyl pentanoic acid of involves compounds as represented in the attached image.

From the task content:

It therefore follows that the Starting compound A and intermediate compound B are as represented in the attached image.

Remarks: The reagents provided are, H3O, Potassium cyanide and Hydrogen cyanide.

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Answer:

66 km.

Explanation:

88 km / 1 hour = 66 km / 0.75 hours.

You need to just multiply 0.75 by 88.

The answer is 66 km.

The chemical bonds formed between the oxygen and hydrogen atoms in a water molecule are called covalent bonds.

In a water molecule (H2O), each oxygen atom shares electrons with two hydrogen atoms. This sharing of electrons occurs through covalent bonds. Covalent bonds are formed when atoms share one or more pairs of electrons in order to achieve a more stable electron configuration.

In the case of water, the oxygen atom has six valence electrons, while each hydrogen atom has one valence electron. Oxygen needs two additional electrons to achieve a stable octet configuration, while each hydrogen atom needs one additional electron.

To fulfill these requirements, the oxygen atom forms two covalent bonds with the hydrogen atoms. Each hydrogen bonds atom shares one of its electrons with the oxygen atom, and the oxygen atom shares two of its electrons with the hydrogen atoms. This sharing of electrons allows each atom to achieve a more stable electron configuration, resulting in the formation of the water molecule.

Overall, the covalent bonds between the oxygen and hydrogen atoms in water play a crucial role in creating the stable molecular structure and properties of water.

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The equation that depicts a single replacement reaction would be: Zn(s) + 2HCl(aq)→ ZnCl2​​​(aq) ​​​​+ H2(g)

They are also known as single displacement reactions.

They are reactions in which one element takes the place of another in a compound. That is, one element replaces another in a compound.

Looking at all the reactions from A - D, one can see that the only reaction that exemplifies a single replacement reaction is D.

Here, Zn replaced H in HCl.

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Answer:

C.

reduce the amount of fossil fuels they combust

Explanation:

study island

Step 1

The reaction:

CaCO3 + heat => CaO + CO2 (completed and balanced)

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

Step 2

Information provided:

Actual yield = 0.53

The combine mass of the sled and the rider, given that each dog pulled with a force of 30 N is 200 Kg

We know that force is related to mass and acceleration according to the following formula:

Force (F) = mass (m) × acceleration (a)

F = ma

With the above formula, we can determine the combined mass of the sled and rider. Details below.

From the question given above, the following data were obtained:

The combined mass can be obtained as follow:

Force = mass × acceleration

240 = mass × 1.2

Divide both sides by 1.2

Mass = 240 / 1.2

Mass = 200 Kg

Thus, the combine mass is 200 Kg

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The correct IUPAC name of the compound is 7-chlorohept-(3E)-en-1-yne.

The IUPAC name of a compound is determined by following a set of rules established by the International Union of Pure and Applied Chemistry (IUPAC). To determine the correct name of the compound given, we need to analyze its structure and identify the functional groups, substituents, and their positions.

In this case, the compound has a chain of seven carbon atoms (hept) with a chlorine atom (chloro) attached at the 7th position. It also contains a triple bond (yne) and a double bond (en) on adjacent carbon atoms. The stereochemistry of the double bond is indicated by the E configuration, which means that the two highest priority substituents are on opposite sides of the double bond.

Therefore, the correct IUPAC name of the compound is 7-chlorohept-(3E)-en-1-yne.

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Answer:

The car has been on the road for 0.49 hours

Explanation:

A car is traveling 35 miles/hr for 17 miles.

Speed of a car = 35 miles/hr

Distance travelled = 17 miles

The relationship between speed, distance, and time is given by

Distance = Speed × Time

Put Speed = 35 miles/hr, Distance = 17 miles

\(17=35\) × Time

Time = \(\frac{17}{35}=0.49\) hours

So, the car has been on the road for 0.49 hours

The time car has been on the road has been 0.49 hours. Thus, option D is correct.

Speed can be defined as the distance traveled by the object in unit time. The speed can be expressed as:

\(\rm Speed\;=\;\dfrac{Distance}{Time}\)

The car has been given to be traveling at:

Speed = 35 miles/hr

Distance traveled = 17 miles.

The time taken by car to travel 17 miles can be calculated by substituting the values as:

\(\rm 35\;miles/hr\;=\;\dfrac{17\;miles}{Time}\\\\\\\\Time\;=\;\dfrac{17\;miles}{35\;miles/hr}\)

Time = 0.49 hr.

The time taken by car to travel 17 miles has been 0.49 hours. Thus, the correct option has been D.

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Answer:

3.) 195

Explanation:

Because platinum is 195.079 amu (its on the periodic table)

A purple box has P t at the center and 78 above. Below it says platinum and below that 195.08. Rounded to the nearest whole number, 195 is the atomic mass of platinum. Therefore, option C is correct.

The number of protons an element contains determines its atomic number, which is used to distinguish one element from another. The total number of protons and neutrons in an element determines its mass number.

The mass number is the total number of protons and neutrons in the nucleus. This is due to the fact that each proton and neutron has a mass of one atomic mass unit (amu). You can determine the mass of the atom by multiplying the total number of protons and neutrons by 1 amu.

Because its numerical value is equal to the element's molar mass, the average atomic mass is helpful. In turn, this helps determine how much of a solid.

The atomic mass of platinum is 195. Because atomic mass is always the bottom number below the name of the element.

Thus, option C is correct.

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Answer:

C-C

A carbon has 4 valence electrons meaning it can share 4 electrons and is in short of 4 electrons to fill it outer energy shell making it 8. Which results to 2 double covalent bonds ,meaning there was a sharing of 2(4) = 8 electrons . Hope this helps . Your statement above is true .

The range of the of the oxidation number of the first transition series is +2 to +6.

Transition elements or transition metals are elements or metals that have partially filled d orbitals.

The first main transition series begins with either;

Thus, the range of the of the oxidation number of the first transition series is +2 to +6.

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Answer:

0.313 liters

Explanation:

You want to use the Combined Gas Law Equation: (P1*V1)/(n1*T1)=(P2*V2)/(n2*T2). You then want to cross off things that don't change, so moles(n) in this example. Then convert the temperature to Kelvin (always), and solve algebraically.

The pressure exerted by the neon gas, when the volume is increased from 7.2 mL to 28.8 mL at constant temperature, can be calculated using Boyle's Law. The pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

Boyle's Law states that at constant temperature, the product of the pressure and volume of a gas remains constant. Mathematically, it can be expressed as P₁V₁ = P₂V₂. This law allows us to calculate the change in pressure when the volume changes.

In this case, the initial volume (V₁) is given as 7.2 mL, and the initial pressure (P₁) is 1.5 atm. The final volume (V₂) is 28.8 mL. By substituting these values into Boyle's Law equation, we can solve for the final pressure (P₂).

When we perform the calculations, we find that the pressure exerted by the neon gas, when the volume is increased to 28.8 mL, is 0.375 atm. As the volume increases, the pressure decreases due to the inverse relationship between pressure and volume.

Using Boyle's Law: P₁V₁ = P₂V₂

Given:

Initial volume (V₁) = 7.2 mL

Initial pressure (P₁) = 1.5 atm

Final volume (V₂) = 28.8 mL

To find the final pressure (P₂):

P₂ = (P₁ * V₁) / V₂

  = (1.5 atm * 7.2 mL) / 28.8 mL

  = 0.375 atm

Therefore, the pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

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